splunk-security_content/docs/stories.md

Splunk Security Content Analytic Stories

All the Analytic Stories shipped to different Splunk products. Below is a breakdown by kind.

Abuse

details

Brand Monitoring

Detect and investigate activity that may indicate that an adversary is using faux domains to mislead users into interacting with malicious infrastructure. Monitor DNS, email, and web traffic for permutations of your brand name.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Email, Endpoint, Web
• ATT&CK:
• Last Updated: 2017-12-19

details

Detection Profile

• DNSTwist Domain Names

• Get Email Info

• Get Emails From Specific Sender

• Get Notable History

• Get Process Responsible For The DNS Traffic

• Monitor Email For Brand Abuse

• Monitor Web Traffic For Brand Abuse

ATT&CK

ID	Technique	Tactic

Kill Chain Phase

• Delivery

Reference

• https://www.zerofox.com/blog/what-is-digital-risk-monitoring/

• https://securingtomorrow.mcafee.com/consumer/family-safety/what-is-typosquatting/

• https://blog.malwarebytes.com/cybercrime/2016/06/explained-typosquatting/

version: 1

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DNS Amplification Attacks

DNS poses a serious threat as a Denial of Service (DOS) amplifier, if it responds to ANY queries. This Analytic Story can help you detect attackers who may be abusing your company's DNS infrastructure to launch amplification attacks, causing Denial of Service to other victims.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Network_Resolution
• ATT&CK: T1498.002
• Last Updated: 2016-09-13

details

Detection Profile

• Get Notable History

• Large Volume of DNS ANY Queries

ATT&CK

ID	Technique	Tactic
T1498.002	Reflection Amplification	Impact

Kill Chain Phase

• Actions on Objectives

Reference

• https://www.us-cert.gov/ncas/alerts/TA13-088A

• https://www.imperva.com/learn/application-security/dns-amplification/

version: 1

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Data Protection

Fortify your data-protection arsenal--while continuing to ensure data confidentiality and integrity--with searches that monitor for and help you investigate possible signs of data exfiltration.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Resolution, Network_Traffic
• ATT&CK: T1189
• Last Updated: 2017-09-14

details

Detection Profile

• Detect hosts connecting to dynamic domain providers

• Get DNS Server History for a host

• Get DNS traffic ratio

• Get Notable History

• Get Process Info

• Get Process Responsible For The DNS Traffic

ATT&CK

ID	Technique	Tactic
T1189	Drive-by Compromise	Initial Access

Kill Chain Phase

• Actions on Objectives

• Command and Control

Reference

• https://www.cisecurity.org/controls/data-protection/

• https://www.sans.org/reading-room/whitepapers/dns/splunk-detect-dns-tunneling-37022

• https://umbrella.cisco.com/blog/2013/04/15/on-the-trail-of-malicious-dynamic-dns-domains/

version: 1

---

Netsh Abuse

Detect activities and various techniques associated with the abuse of netsh.exe, which can disable local firewall settings or set up a remote connection to a host from an infected system.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK: T1562.004
• Last Updated: 2017-01-05

details

Detection Profile

• Baseline of SMB Traffic - MLTK

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Previously seen command line arguments

• Processes launching netsh

ATT&CK

ID	Technique	Tactic
T1562.004	Disable or Modify System Firewall	Defense Evasion

Kill Chain Phase

• Actions on Objectives

Reference

• https://docs.microsoft.com/en-us/previous-versions/tn-archive/bb490939(v=technet.10)

• https://htmlpreview.github.io/?https://github.com/MatthewDemaske/blogbackup/blob/master/netshell.html

• http://blog.jpcert.or.jp/2016/01/windows-commands-abused-by-attackers.html

version: 1

---

Adversary Tactics

details

Active Directory Password Spraying

Monitor for activities and techniques associated with Password Spraying attacks within Active Directory environments.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1110.003
• Last Updated: 2021-04-07

details

Detection Profile

• Multiple Disabled Users Failing To Authenticate From Host Using Kerberos

• Multiple Invalid Users Failing To Authenticate From Host Using Kerberos

• Multiple Invalid Users Failing To Authenticate From Host Using NTLM

• Multiple Users Attempting To Authenticate Using Explicit Credentials

• Multiple Users Failing To Authenticate From Host Using Kerberos

• Multiple Users Failing To Authenticate From Host Using NTLM

• Multiple Users Failing To Authenticate From Process

• Multiple Users Remotely Failing To Authenticate From Host

ATT&CK

ID	Technique	Tactic
T1110.003	Password Spraying	Credential Access

Kill Chain Phase

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1110/003/

• https://www.microsoft.com/security/blog/2020/04/23/protecting-organization-password-spray-attacks/

• https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/dn452415(v=ws.11)

version: 1

---

BITS Jobs

Adversaries may abuse BITS jobs to persistently execute or clean up after malicious payloads.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1105, T1197
• Last Updated: 2021-03-26

details

Detection Profile

• BITS Job Persistence

• BITSAdmin Download File

• PowerShell Start-BitsTransfer

ATT&CK

ID	Technique	Tactic
T1197	BITS Jobs	Defense Evasion, Persistence
T1105	Ingress Tool Transfer	Command And Control

Kill Chain Phase

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1197/

• https://docs.microsoft.com/en-us/windows/win32/bits/bitsadmin-tool

version: 1

---

Baron Samedit CVE-2021-3156

Uncover activity consistent with CVE-2021-3156. Discovered by the Qualys Research Team, this vulnerability has been found to affect sudo across multiple Linux distributions (Ubuntu 20.04 and prior, Debian 10 and prior, Fedora 33 and prior). As this vulnerability was committed to code in July 2011, there will be many distributions affected. Successful exploitation of this vulnerability allows any unprivileged user to gain root privileges on the vulnerable host.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1068
• Last Updated: 2021-01-27

details

Detection Profile

• Detect Baron Samedit CVE-2021-3156

• Detect Baron Samedit CVE-2021-3156 Segfault

• Detect Baron Samedit CVE-2021-3156 via OSQuery

ATT&CK

ID	Technique	Tactic
T1068	Exploitation for Privilege Escalation	Privilege Escalation

Kill Chain Phase

• Exploitation

Reference

• https://blog.qualys.com/vulnerabilities-research/2021/01/26/cve-2021-3156-heap-based-buffer-overflow-in-sudo-baron-samedit

version: 1

---

Cobalt Strike

Cobalt Strike is threat emulation software. Red teams and penetration testers use Cobalt Strike to demonstrate the risk of a breach and evaluate mature security programs. Most recently, Cobalt Strike has become the choice tool by threat groups due to its ease of use and extensibility.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1036.003, T1055, T1059.003, T1127, T1127.001, T1218.010, T1218.011, T1543.003, T1548, T1560.001
• Last Updated: 2021-02-16

details

Detection Profile

• Anomalous usage of 7zip

• CMD Echo Pipe - Escalation

• Cobalt Strike Named Pipes

• DLLHost with no Command Line Arguments with Network

• Detect Regsvr32 Application Control Bypass

• GPUpdate with no Command Line Arguments with Network

• Rundll32 with no Command Line Arguments with Network

• SearchProtocolHost with no Command Line with Network

• Services Escalate Exe

• Suspicious DLLHost no Command Line Arguments

• Suspicious GPUpdate no Command Line Arguments

• Suspicious MSBuild Rename

• Suspicious Rundll32 StartW

• Suspicious Rundll32 no Command Line Arguments

• Suspicious SearchProtocolHost no Command Line Arguments

• Suspicious microsoft workflow compiler rename

• Suspicious msbuild path

ATT&CK

ID	Technique	Tactic
T1560.001	Archive via Utility	Collection
T1059.003	Windows Command Shell	Execution
T1543.003	Windows Service	Persistence, Privilege Escalation
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1071.002	File Transfer Protocols	Command And Control
T1218.010	Regsvr32	Defense Evasion
T1218.005	Mshta	Defense Evasion
T1569.002	Service Execution	Execution
T1027	Obfuscated Files or Information	Defense Evasion
T1218.011	Rundll32	Defense Evasion
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation
T1548	Abuse Elevation Control Mechanism	Privilege Escalation, Defense Evasion
T1203	Exploitation for Client Execution	Execution
T1505.003	Web Shell	Persistence
T1127.001	MSBuild	Defense Evasion
T1036.003	Rename System Utilities	Defense Evasion
T1127	Trusted Developer Utilities Proxy Execution	Defense Evasion
T1071.001	Web Protocols	Command And Control
T1018	Remote System Discovery	Discovery

Kill Chain Phase

• Actions on Objective

• Actions on Objectives

• Exploitation

• Privilege Escalation

Reference

• https://www.cobaltstrike.com/

• https://www.infocyte.com/blog/2020/09/02/cobalt-strike-the-new-favorite-among-thieves/

• https://bluescreenofjeff.com/2017-01-24-how-to-write-malleable-c2-profiles-for-cobalt-strike/

• https://blog.talosintelligence.com/2020/09/coverage-strikes-back-cobalt-strike-paper.html

• https://www.fireeye.com/blog/threat-research/2020/12/unauthorized-access-of-fireeye-red-team-tools.html

• https://github.com/MichaelKoczwara/Awesome-CobaltStrike-Defence

• https://github.com/zer0yu/Awesome-CobaltStrike

version: 1

---

Collection and Staging

Monitor for and investigate activities--such as suspicious writes to the Windows Recycling Bin or email servers sending high amounts of traffic to specific hosts, for example--that may indicate that an adversary is harvesting and exfiltrating sensitive data.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK: T1036, T1114.001, T1114.002, T1560.001
• Last Updated: 2020-02-03

details

Detection Profile

• Detect Renamed 7-Zip

• Detect Renamed WinRAR

• Email files written outside of the Outlook directory

• Email servers sending high volume traffic to hosts

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Hosts receiving high volume of network traffic from email server

• Suspicious writes to windows Recycle Bin

ATT&CK

ID	Technique	Tactic
T1560.001	Archive via Utility	Collection
T1114.001	Local Email Collection	Collection
T1114.002	Remote Email Collection	Collection
T1036	Masquerading	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Exfiltration

• Exploitation

Reference

• https://attack.mitre.org/wiki/Collection

• https://attack.mitre.org/wiki/Technique/T1074

version: 1

---

Command and Control

Detect and investigate tactics, techniques, and procedures leveraged by attackers to establish and operate command and control channels. Implants installed by attackers on compromised endpoints use these channels to receive instructions and send data back to the malicious operators.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Resolution, Network_Traffic
• ATT&CK: T1048, T1048.003, T1071.001, T1071.004, T1095, T1189
• Last Updated: 2018-06-01

details

Detection Profile

• AWS Investigate User Activities By ARN

• AWS Network ACL Details from ID

• AWS Network Interface details via resourceId

• Baseline of DNS Query Length - MLTK

• Baseline of blocked outbound traffic from AWS

• DNS Exfiltration Using Nslookup App

• DNS Query Length Outliers - MLTK

• DNS Query Length With High Standard Deviation

• Detect Large Outbound ICMP Packets

• Detect Spike in blocked Outbound Traffic from your AWS

• Detect hosts connecting to dynamic domain providers

• Excessive DNS Failures

• Excessive Usage of NSLOOKUP App

• Get All AWS Activity From IP Address

• Get DNS Server History for a host

• Get DNS traffic ratio

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Get Process Information For Port Activity

• Get Process Responsible For The DNS Traffic

• Multiple Archive Files Http Post Traffic

• Plain HTTP POST Exfiltrated Data

• Prohibited Network Traffic Allowed

• Protocol or Port Mismatch

• TOR Traffic

ATT&CK

ID	Technique	Tactic
T1048	Exfiltration Over Alternative Protocol	Exfiltration
T1071.004	DNS	Command And Control
T1048.003	Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol	Exfiltration
T1095	Non-Application Layer Protocol	Command And Control
T1041	Exfiltration Over C2 Channel	Exfiltration
T1189	Drive-by Compromise	Initial Access
T1537	Transfer Data to Cloud Account	Exfiltration
T1114.001	Local Email Collection	Collection
T1114	Email Collection	Collection
T1114.003	Email Forwarding Rule	Collection
T1071.001	Web Protocols	Command And Control

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Delivery

• Exfiltration

• Exploitation

Reference

• https://attack.mitre.org/wiki/Command_and_Control

• https://searchsecurity.techtarget.com/feature/Command-and-control-servers-The-puppet-masters-that-govern-malware

version: 1

---

Credential Dumping

Uncover activity consistent with credential dumping, a technique wherein attackers compromise systems and attempt to obtain and exfiltrate passwords. The threat actors use these pilfered credentials to further escalate privileges and spread throughout a target environment. The included searches in this Analytic Story are designed to identify attempts to credential dumping.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Authentication, Endpoint
• ATT&CK: T1003, T1003.001, T1003.002, T1003.003, T1055, T1059.001, T1068, T1078, T1087, T1098, T1134, T1201, T1543, T1547, T1548, T1552, T1554, T1555, T1556, T1558, T1558.003
• Last Updated: 2020-02-04

details

Detection Profile

• Access LSASS Memory for Dump Creation

• Applying Stolen Credentials via Mimikatz modules

• Applying Stolen Credentials via PowerSploit modules

• Assessment of Credential Strength via DSInternals modules

• Attempted Credential Dump From Registry via Reg exe

• Create Remote Thread into LSASS

• Creation of Shadow Copy

• Creation of Shadow Copy with wmic and powershell

• Creation of lsass Dump with Taskmgr

• Credential Dumping via Copy Command from Shadow Copy

• Credential Dumping via Symlink to Shadow Copy

• Credential Extraction indicative of FGDump and CacheDump with s option

• Credential Extraction indicative of FGDump and CacheDump with v option

• Credential Extraction indicative of Lazagne command line options

• Credential Extraction indicative of use of DSInternals credential conversion modules

• Credential Extraction indicative of use of DSInternals modules

• Credential Extraction indicative of use of Mimikatz modules

• Credential Extraction indicative of use of PowerSploit modules

• Credential Extraction native Microsoft debuggers peek into the kernel

• Credential Extraction native Microsoft debuggers via z command line option

• Credential Extraction via Get-ADDBAccount module present in PowerSploit and DSInternals

• Detect Copy of ShadowCopy with Script Block Logging

• Detect Credential Dumping through LSASS access

• Detect Dump LSASS Memory using comsvcs

• Detect Kerberoasting

• Detect Mimikatz Using Loaded Images

• Dump LSASS via comsvcs DLL

• Dump LSASS via procdump

• Dump LSASS via procdump Rename

• Esentutl SAM Copy

• Extract SAM from Registry

• Investigate Failed Logins for Multiple Destinations

• Investigate Pass the Hash Attempts

• Investigate Pass the Ticket Attempts

• Investigate Previous Unseen User

• Ntdsutil Export NTDS

• SAM Database File Access Attempt

• SecretDumps Offline NTDS Dumping Tool

• Set Default PowerShell Execution Policy To Unrestricted or Bypass

ATT&CK

ID	Technique	Tactic
T1003.001	LSASS Memory	Credential Access
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1068	Exploitation for Privilege Escalation	Privilege Escalation
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1098	Account Manipulation	Persistence
T1134	Access Token Manipulation	Defense Evasion, Privilege Escalation
T1543	Create or Modify System Process	Persistence, Privilege Escalation
T1547	Boot or Logon Autostart Execution	Persistence, Privilege Escalation
T1548	Abuse Elevation Control Mechanism	Privilege Escalation, Defense Evasion
T1554	Compromise Client Software Binary	Persistence
T1556	Modify Authentication Process	Credential Access, Defense Evasion, Persistence
T1558	Steal or Forge Kerberos Tickets	Credential Access
T1555	Credentials from Password Stores	Credential Access
T1087	Account Discovery	Discovery
T1201	Password Policy Discovery	Discovery
T1552	Unsecured Credentials	Credential Access
T1003	OS Credential Dumping	Credential Access
T1003.002	Security Account Manager	Credential Access
T1003.003	NTDS	Credential Access
T1558.003	Kerberoasting	Credential Access
T1059.001	PowerShell	Execution

Kill Chain Phase

• Actions on Objectives

• Exploitation

• Installation

• Lateral Movement

• Privilege Escalation

Reference

• https://attack.mitre.org/wiki/Technique/T1003

• https://cyberwardog.blogspot.com/2017/03/chronicles-of-threat-hunter-hunting-for.html

version: 3

---

DNS Hijacking

Secure your environment against DNS hijacks with searches that help you detect and investigate unauthorized changes to DNS records.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Network_Resolution
• ATT&CK: T1189
• Last Updated: 2020-02-04

details

Detection Profile

• Detect hosts connecting to dynamic domain providers

• Discover DNS records

• Get DNS Server History for a host

ATT&CK

ID	Technique	Tactic
T1189	Drive-by Compromise	Initial Access

Kill Chain Phase

• Actions on Objectives

• Command and Control

Reference

• https://www.fireeye.com/blog/threat-research/2017/09/apt33-insights-into-iranian-cyber-espionage.html

• https://umbrella.cisco.com/blog/2013/04/15/on-the-trail-of-malicious-dynamic-dns-domains/

• http://www.noip.com/blog/2014/07/11/dynamic-dns-can-use-2/

• https://www.splunk.com/blog/2015/08/04/detecting-dynamic-dns-domains-in-splunk.html

version: 1

---

Data Exfiltration

The stealing of data by an adversary.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK: T1041, T1048, T1048.003, T1114, T1114.001, T1114.003, T1537
• Last Updated: 2020-10-21

details

Detection Profile

• DNS Exfiltration Using Nslookup App

• Detect SNICat SNI Exfiltration

• Detect shared ec2 snapshot

• Excessive Usage of NSLOOKUP App

• Get Notable History

• Mailsniper Invoke functions

• Multiple Archive Files Http Post Traffic

• O365 PST export alert

• O365 Suspicious Admin Email Forwarding

• O365 Suspicious User Email Forwarding

• Plain HTTP POST Exfiltrated Data

ATT&CK

ID	Technique	Tactic
T1048	Exfiltration Over Alternative Protocol	Exfiltration
T1071.004	DNS	Command And Control
T1048.003	Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol	Exfiltration
T1095	Non-Application Layer Protocol	Command And Control
T1041	Exfiltration Over C2 Channel	Exfiltration
T1189	Drive-by Compromise	Initial Access
T1537	Transfer Data to Cloud Account	Exfiltration
T1114.001	Local Email Collection	Collection
T1114	Email Collection	Collection
T1114.003	Email Forwarding Rule	Collection
T1071.001	Web Protocols	Command And Control

Kill Chain Phase

• Actions on Objective

• Actions on Objectives

• Exfiltration

• Exploitation

Reference

• https://attack.mitre.org/tactics/TA0010/

version: 1

---

Deobfuscate-Decode Files or Information

Adversaries may use Obfuscated Files or Information to hide artifacts of an intrusion from analysis.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1140
• Last Updated: 2021-03-24

details

Detection Profile

• CertUtil With Decode Argument

ATT&CK

ID	Technique	Tactic
T1140	Deobfuscate/Decode Files or Information	Defense Evasion

Kill Chain Phase

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1140/

version: 1

---

Detect Zerologon Attack

Uncover activity related to the execution of Zerologon CVE-2020-11472, a technique wherein attackers target a Microsoft Windows Domain Controller to reset its computer account password. The result from this attack is attackers can now provide themselves high privileges and take over Domain Controller. The included searches in this Analytic Story are designed to identify attempts to reset Domain Controller Computer Account via exploit code remotely or via the use of tool Mimikatz as payload carrier.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1003.001, T1190, T1210
• Last Updated: 2020-09-18

details

Detection Profile

• Detect Computer Changed with Anonymous Account

• Detect Credential Dumping through LSASS access

• Detect Mimikatz Using Loaded Images

• Detect Zerologon via Zeek

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1210	Exploitation of Remote Services	Lateral Movement
T1003.001	LSASS Memory	Credential Access
T1190	Exploit Public-Facing Application	Initial Access

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://attack.mitre.org/wiki/Technique/T1003

• https://github.com/SecuraBV/CVE-2020-1472

• https://www.secura.com/blog/zero-logon

• https://nvd.nist.gov/vuln/detail/CVE-2020-1472

version: 1

---

Disabling Security Tools

Looks for activities and techniques associated with the disabling of security tools on a Windows system, such as suspicious reg.exe processes, processes launching netsh, and many others.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK: T1112, T1543.003, T1553.004, T1562.001, T1562.004
• Last Updated: 2020-02-04

details

Detection Profile

• Attempt To Add Certificate To Untrusted Store

• Attempt To Stop Security Service

• Baseline of SMB Traffic - MLTK

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Previously seen command line arguments

• Processes launching netsh

• Sc exe Manipulating Windows Services

• Suspicious Reg exe Process

• Unload Sysmon Filter Driver

ATT&CK

ID	Technique	Tactic
T1553.004	Install Root Certificate	Defense Evasion
T1562.001	Disable or Modify Tools	Defense Evasion
T1562.004	Disable or Modify System Firewall	Defense Evasion
T1543.003	Windows Service	Persistence, Privilege Escalation
T1112	Modify Registry	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Installation

Reference

• https://attack.mitre.org/wiki/Technique/T1089

• https://blog.malwarebytes.com/cybercrime/2015/11/vonteera-adware-uses-certificates-to-disable-anti-malware/

• https://www.operationblockbuster.com/wp-content/uploads/2016/02/Operation-Blockbuster-Tools-Report.pdf

version: 2

---

Domain Trust Discovery

Adversaries may attempt to gather information on domain trust relationships that may be used to identify lateral movement opportunities in Windows multi-domain/forest environments.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1018, T1482
• Last Updated: 2021-03-25

details

Detection Profile

• DSQuery Domain Discovery

• NLTest Domain Trust Discovery

• Windows AdFind Exe

ATT&CK

ID	Technique	Tactic
T1482	Domain Trust Discovery	Discovery
T1018	Remote System Discovery	Discovery

Kill Chain Phase

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1482/

version: 1

---

F5 TMUI RCE CVE-2020-5902

Uncover activity consistent with CVE-2020-5902. Discovered by Positive Technologies researchers, this vulnerability affects F5 BIG-IP, BIG-IQ. and Traffix SDC devices (vulnerable versions in F5 support link below). This vulnerability allows unauthenticated users, along with authenticated users, who have access to the configuration utility to execute system commands, create/delete files, disable services, and/or execute Java code. This vulnerability can result in full system compromise.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1190
• Last Updated: 2020-08-02

details

Detection Profile

• Detect F5 TMUI RCE CVE-2020-5902

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1190	Exploit Public-Facing Application	Initial Access

Kill Chain Phase

• Exploitation

Reference

• https://www.ptsecurity.com/ww-en/about/news/f5-fixes-critical-vulnerability-discovered-by-positive-technologies-in-big-ip-application-delivery-controller/

• https://support.f5.com/csp/article/K52145254

• https://blog.cloudflare.com/cve-2020-5902-helping-to-protect-against-the-f5-tmui-rce-vulnerability/

version: 1

---

HAFNIUM Group

HAFNIUM group was identified by Microsoft as exploiting 4 Microsoft Exchange CVEs in the wild - CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK: T1003.001, T1003.003, T1021.002, T1059.001, T1114.002, T1136.001, T1190, T1505.003, T1569.002
• Last Updated: 2021-03-03

details

Detection Profile

• Any Powershell DownloadString

• Detect Exchange Web Shell

• Detect New Local Admin account

• Detect PsExec With accepteula Flag

• Detect Renamed PSExec

• Dump LSASS via comsvcs DLL

• Dump LSASS via procdump

• Dump LSASS via procdump Rename

• Email servers sending high volume traffic to hosts

• Malicious PowerShell Process - Connect To Internet With Hidden Window

• Malicious PowerShell Process - Execution Policy Bypass

• Nishang PowershellTCPOneLine

• Ntdsutil Export NTDS

• Set Default PowerShell Execution Policy To Unrestricted or Bypass

• Unified Messaging Service Spawning a Process

• W3WP Spawning Shell

ATT&CK

ID	Technique	Tactic
T1059.001	PowerShell	Execution
T1505.003	Web Shell	Persistence
T1136.001	Local Account	Persistence
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1569.002	Service Execution	Execution
T1003.001	LSASS Memory	Credential Access
T1114.002	Remote Email Collection	Collection
T1003.003	NTDS	Credential Access
T1190	Exploit Public-Facing Application	Initial Access

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Execution

• Exploitation

• Installation

• Lateral Movement

Reference

• https://www.splunk.com/en_us/blog/security/detecting-hafnium-exchange-server-zero-day-activity-in-splunk.html

• https://www.volexity.com/blog/2021/03/02/active-exploitation-of-microsoft-exchange-zero-day-vulnerabilities/

• https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/

• https://blog.rapid7.com/2021/03/03/rapid7s-insightidr-enables-detection-and-response-to-microsoft-exchange-0-day/

version: 1

---

Ingress Tool Transfer

Adversaries may transfer tools or other files from an external system into a compromised environment. Files may be copied from an external adversary controlled system through the command and control channel to bring tools into the victim network or through alternate protocols with another tool such as FTP.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1059.001, T1105, T1197
• Last Updated: 2021-03-24

details

Detection Profile

• Any Powershell DownloadFile

• Any Powershell DownloadString

• BITSAdmin Download File

• CertUtil Download With URLCache and Split Arguments

• CertUtil Download With VerifyCtl and Split Arguments

• Suspicious Curl Network Connection

ATT&CK

ID	Technique	Tactic
T1059.001	PowerShell	Execution
T1197	BITS Jobs	Defense Evasion, Persistence
T1105	Ingress Tool Transfer	Command And Control
T1003	OS Credential Dumping	Credential Access
T1021	Remote Services	Lateral Movement
T1113	Screen Capture	Collection
T1123	Audio Capture	Collection
T1563	Remote Service Session Hijacking	Lateral Movement
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1134	Access Token Manipulation	Defense Evasion, Privilege Escalation
T1548	Abuse Elevation Control Mechanism	Privilege Escalation, Defense Evasion
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1106	Native API	Execution
T1569	System Services	Execution
T1027	Obfuscated Files or Information	Defense Evasion
T1027.005	Indicator Removal from Tools	Defense Evasion
T1546.015	Component Object Model Hijacking	Privilege Escalation, Persistence
T1140	Deobfuscate/Decode Files or Information	Defense Evasion
T1592	Gather Victim Host Information	Reconnaissance
T1562	Impair Defenses	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1105/

version: 1

---

Lateral Movement

Detect and investigate tactics, techniques, and procedures around how attackers move laterally within the enterprise. Because lateral movement can expose the adversary to detection, it should be an important focus for security analysts.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Authentication, Email, Endpoint, Network_Traffic
• ATT&CK: T1021.001, T1021.002, T1053.005, T1550.002, T1558.003, T1569.002
• Last Updated: 2020-02-04

details

Detection Profile

• Detect Activity Related to Pass the Hash Attacks

• Detect Pass the Hash

• Detect PsExec With accepteula Flag

• Detect Renamed PSExec

• Get History Of Email Sources

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Get Process Information For Port Activity

• Investigate Successful Remote Desktop Authentications

• Kerberoasting spn request with RC4 encryption

• Remote Desktop Network Traffic

• Remote Desktop Process Running On System

• Schtasks scheduling job on remote system

ATT&CK

ID	Technique	Tactic
T1550.002	Pass the Hash	Defense Evasion, Lateral Movement
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1569.002	Service Execution	Execution
T1558.003	Kerberoasting	Credential Access
T1021.001	Remote Desktop Protocol	Lateral Movement
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation

Kill Chain Phase

• Actions on Objectives

• Execution

• Exploitation

• Lateral Movement

Reference

• https://www.fireeye.com/blog/executive-perspective/2015/08/malware_lateral_move.html

version: 2

---

Malicious PowerShell

Attackers are finding stealthy ways "live off the land," leveraging utilities and tools that come standard on the endpoint--such as PowerShell--to achieve their goals without downloading binary files. These searches can help you detect and investigate PowerShell command-line options that may be indicative of malicious intent.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Email, Endpoint
• ATT&CK: T1003, T1021, T1027, T1027.005, T1053, T1055, T1059.001, T1106, T1113, T1123, T1134, T1140, T1546.015, T1548, T1562, T1563, T1569, T1592
• Last Updated: 2017-08-23

details

Detection Profile

• Any Powershell DownloadFile

• Any Powershell DownloadString

• Credential Extraction indicative of use of DSInternals credential conversion modules

• Credential Extraction indicative of use of DSInternals modules

• Credential Extraction indicative of use of PowerSploit modules

• Credential Extraction via Get-ADDBAccount module present in PowerSploit and DSInternals

• Detect Empire with PowerShell Script Block Logging

• Detect Mimikatz With PowerShell Script Block Logging

• Get History Of Email Sources

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Illegal Access To User Content via PowerSploit modules

• Illegal Privilege Elevation and Persistence via PowerSploit modules

• Illegal Service and Process Control via PowerSploit modules

• Malicious PowerShell Process - Connect To Internet With Hidden Window

• Malicious PowerShell Process - Encoded Command

• Malicious PowerShell Process With Obfuscation Techniques

• PowerShell 4104 Hunting

• PowerShell Domain Enumeration

• PowerShell Loading DotNET into Memory via System Reflection Assembly

• Powershell Creating Thread Mutex

• Powershell Enable SMB1Protocol Feature

• Powershell Execute COM Object

• Powershell Fileless Process Injection via GetProcAddress

• Powershell Fileless Script Contains Base64 Encoded Content

• Powershell Processing Stream Of Data

• Powershell Using memory As Backing Store

• Recon AVProduct Through Pwh or WMI

• Recon Using WMI Class

• Set Default PowerShell Execution Policy To Unrestricted or Bypass

• Unloading AMSI via Reflection

• WMI Recon Running Process Or Services

ATT&CK

ID	Technique	Tactic
T1059.001	PowerShell	Execution
T1197	BITS Jobs	Defense Evasion, Persistence
T1105	Ingress Tool Transfer	Command And Control
T1003	OS Credential Dumping	Credential Access
T1021	Remote Services	Lateral Movement
T1113	Screen Capture	Collection
T1123	Audio Capture	Collection
T1563	Remote Service Session Hijacking	Lateral Movement
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1134	Access Token Manipulation	Defense Evasion, Privilege Escalation
T1548	Abuse Elevation Control Mechanism	Privilege Escalation, Defense Evasion
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1106	Native API	Execution
T1569	System Services	Execution
T1027	Obfuscated Files or Information	Defense Evasion
T1027.005	Indicator Removal from Tools	Defense Evasion
T1546.015	Component Object Model Hijacking	Privilege Escalation, Persistence
T1140	Deobfuscate/Decode Files or Information	Defense Evasion
T1592	Gather Victim Host Information	Reconnaissance
T1562	Impair Defenses	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Exploitation

• Installation

• Privilege Escalation

• Reconnaissance

Reference

• https://blogs.mcafee.com/mcafee-labs/malware-employs-powershell-to-infect-systems/

• https://www.crowdstrike.com/blog/bears-midst-intrusion-democratic-national-committee/

version: 5

---

Masquerading - Rename System Utilities

Adversaries may rename legitimate system utilities to try to evade security mechanisms concerning the usage of those utilities.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1036, T1036.003, T1127, T1127.001, T1218.011
• Last Updated: 2021-04-26

details

Detection Profile

• Execution of File with Multiple Extensions

• Suspicious MSBuild Rename

• Suspicious Rundll32 Rename

• Suspicious microsoft workflow compiler rename

• Suspicious msbuild path

• System Process Running from Unexpected Location

• System Processes Run From Unexpected Locations

ATT&CK

ID	Technique	Tactic
T1036.003	Rename System Utilities	Defense Evasion
T1127.001	MSBuild	Defense Evasion
T1218.011	Rundll32	Defense Evasion
T1127	Trusted Developer Utilities Proxy Execution	Defense Evasion
T1036	Masquerading	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1036/003/

version: 1

---

Meterpreter

Meterpreter provides red teams, pen testers and threat actors interactive access to a compromised host to run commands, upload payloads, download files, and other actions.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1033
• Last Updated: 2021-06-08

details

Detection Profile

• Excessive number of taskhost processes

ATT&CK

ID	Technique	Tactic
T1033	System Owner/User Discovery	Discovery

Kill Chain Phase

• Exploitation

Reference

• https://www.offensive-security.com/metasploit-unleashed/about-meterpreter/

• https://doubleoctopus.com/security-wiki/threats-and-tools/meterpreter/

• https://www.rapid7.com/products/metasploit/

version: 1

---

NOBELIUM Group

Sunburst is a trojanized updates to SolarWinds Orion IT monitoring and management software. It was discovered by FireEye in December 2020. The actors behind this campaign gained access to numerous public and private organizations around the world.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic, Web
• ATT&CK: T1018, T1027, T1053.005, T1059.003, T1071.001, T1071.002, T1203, T1218.005, T1505.003, T1543.003, T1560.001, T1569.002
• Last Updated: 2020-12-14

details

Detection Profile

• Anomalous usage of 7zip

• Detect Outbound SMB Traffic

• Detect Prohibited Applications Spawning cmd exe

• Detect Rundll32 Inline HTA Execution

• First Time Seen Running Windows Service

• Malicious PowerShell Process - Encoded Command

• Previously Seen Running Windows Services - Initial

• Previously Seen Running Windows Services - Update

• Sc exe Manipulating Windows Services

• Scheduled Task Deleted Or Created via CMD

• Schtasks scheduling job on remote system

• Sunburst Correlation DLL and Network Event

• Supernova Webshell

• TOR Traffic

• Windows AdFind Exe

ATT&CK

ID	Technique	Tactic
T1560.001	Archive via Utility	Collection
T1059.003	Windows Command Shell	Execution
T1543.003	Windows Service	Persistence, Privilege Escalation
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1071.002	File Transfer Protocols	Command And Control
T1218.010	Regsvr32	Defense Evasion
T1218.005	Mshta	Defense Evasion
T1569.002	Service Execution	Execution
T1027	Obfuscated Files or Information	Defense Evasion
T1218.011	Rundll32	Defense Evasion
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation
T1548	Abuse Elevation Control Mechanism	Privilege Escalation, Defense Evasion
T1203	Exploitation for Client Execution	Execution
T1505.003	Web Shell	Persistence
T1127.001	MSBuild	Defense Evasion
T1036.003	Rename System Utilities	Defense Evasion
T1127	Trusted Developer Utilities Proxy Execution	Defense Evasion
T1071.001	Web Protocols	Command And Control
T1018	Remote System Discovery	Discovery

Kill Chain Phase

• Actions on Objective

• Actions on Objectives

• Command and Control

• Exfiltration

• Exploitation

• Installation

Reference

• https://www.microsoft.com/security/blog/2021/03/04/goldmax-goldfinder-sibot-analyzing-nobelium-malware/

• https://www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-leverages-solarwinds-supply-chain-compromises-with-sunburst-backdoor.html

• https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/

version: 2

---

Possible Backdoor Activity Associated With MUDCARP Espionage Campaigns

Monitor your environment for suspicious behaviors that resemble the techniques employed by the MUDCARP threat group.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Email, Endpoint
• ATT&CK: T1059.001, T1547.001
• Last Updated: 2020-01-22

details

Detection Profile

• Baseline of Command Line Length - MLTK

• Get History Of Email Sources

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Malicious PowerShell Process - Connect To Internet With Hidden Window

• Previously seen command line arguments

• Registry Keys Used For Persistence

• Unusually Long Command Line

• Unusually Long Command Line - MLTK

ATT&CK

ID	Technique	Tactic
T1059.001	PowerShell	Execution
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation

Kill Chain Phase

• Actions on Objectives

• Command and Control

Reference

• https://www.infosecurity-magazine.com/news/scope-of-mudcarp-attacks-highlight-1/

• http://blog.amossys.fr/badflick-is-not-so-bad.html

version: 1

---

SQL Injection

Use the searches in this Analytic Story to help you detect structured query language (SQL) injection attempts characterized by long URLs that contain malicious parameters.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Web
• ATT&CK: T1190
• Last Updated: 2017-09-19

details

Detection Profile

• Get Notable History

• SQL Injection with Long URLs

ATT&CK

ID	Technique	Tactic
T1190	Exploit Public-Facing Application	Initial Access

Kill Chain Phase

• Delivery

Reference

• https://capec.mitre.org/data/definitions/66.html

• https://www.incapsula.com/web-application-security/sql-injection.html

version: 1

---

Silver Sparrow

Silver Sparrow, identified by Red Canary Intelligence, is a new forward looking MacOS (Intel and M1) malicious software downloader utilizing JavaScript for execution and a launchAgent to establish persistence.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1074, T1105, T1543.001
• Last Updated: 2021-02-24

details

Detection Profile

• Suspicious Curl Network Connection

• Suspicious PlistBuddy Usage

• Suspicious PlistBuddy Usage via OSquery

• Suspicious SQLite3 LSQuarantine Behavior

ATT&CK

ID	Technique	Tactic
T1105	Ingress Tool Transfer	Command And Control
T1543.001	Launch Agent	Persistence, Privilege Escalation
T1074	Data Staged	Collection

Kill Chain Phase

• Actions on Objectives

Reference

• https://redcanary.com/blog/clipping-silver-sparrows-wings/

• https://www.sentinelone.com/blog/5-things-you-need-to-know-about-silver-sparrow/

version: 1

---

Spearphishing Attachments

Detect signs of malicious payloads that may indicate that your environment has been breached via a phishing attack.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1003.002, T1566.001, T1566.002
• Last Updated: 2019-04-29

details

Detection Profile

• Detect Outlook exe writing a zip file

• Excel Spawning PowerShell

• Excel Spawning Windows Script Host

• Office Application Spawn rundll32 process

• Office Document Creating Schedule Task

• Office Document Executing Macro Code

• Office Document Spawned Child Process To Download

• Office Product Spawning BITSAdmin

• Office Product Spawning CertUtil

• Office Product Spawning MSHTA

• Office Product Spawning Rundll32 with no DLL

• Office Product Spawning Wmic

• Process Creating LNK file in Suspicious Location

• Winword Spawning Cmd

• Winword Spawning PowerShell

ATT&CK

ID	Technique	Tactic
T1566.001	Spearphishing Attachment	Initial Access
T1003.002	Security Account Manager	Credential Access
T1566.002	Spearphishing Link	Initial Access

Kill Chain Phase

• Actions on Objectives

• Exploitation

• Installation

Reference

• https://www.fireeye.com/blog/threat-research/2019/04/spear-phishing-campaign-targets-ukraine-government.html

version: 1

---

Suspicious Command-Line Executions

Leveraging the Windows command-line interface (CLI) is one of the most common attack techniques--one that is also detailed in the MITRE ATT&CK framework. Use this Analytic Story to help you identify unusual or suspicious use of the CLI on Windows systems.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1036.003, T1059, T1059.003
• Last Updated: 2020-02-03

details

Detection Profile

• Baseline of Command Line Length - MLTK

• Detect Prohibited Applications Spawning cmd exe

• Detect Use of cmd exe to Launch Script Interpreters

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Previously seen command line arguments

• System Processes Run From Unexpected Locations

• Unusually Long Command Line

• Unusually Long Command Line - MLTK

ATT&CK

ID	Technique	Tactic
T1059.003	Windows Command Shell	Execution
T1059	Command and Scripting Interpreter	Execution
T1068	Exploitation for Privilege Escalation	Privilege Escalation
T1036.003	Rename System Utilities	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://attack.mitre.org/wiki/Technique/T1059

• https://www.microsoft.com/en-us/wdsi/threats/macro-malware

• https://www.fireeye.com/content/dam/fireeye-www/services/pdfs/mandiant-apt1-report.pdf

version: 2

---

Suspicious Compiled HTML Activity

Monitor and detect techniques used by attackers who leverage the mshta.exe process to execute malicious code.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1218.001
• Last Updated: 2021-02-11

details

Detection Profile

• Detect HTML Help Renamed

• Detect HTML Help Spawn Child Process

• Detect HTML Help URL in Command Line

• Detect HTML Help Using InfoTech Storage Handlers

ATT&CK

ID	Technique	Tactic
T1218.001	Compiled HTML File	Defense Evasion

Kill Chain Phase

• Actions on Objectives

Reference

• https://redcanary.com/blog/introducing-atomictestharnesses/

• https://attack.mitre.org/techniques/T1218/001/

• https://docs.microsoft.com/en-us/windows/win32/api/htmlhelp/nf-htmlhelp-htmlhelpa

version: 1

---

Suspicious DNS Traffic

Attackers often attempt to hide within or otherwise abuse the domain name system (DNS). You can thwart attempts to manipulate this omnipresent protocol by monitoring for these types of abuses.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Resolution, Network_Traffic
• ATT&CK: T1048, T1048.003, T1071.004, T1189
• Last Updated: 2017-09-18

details

Detection Profile

• Baseline of DNS Query Length - MLTK

• DNS Exfiltration Using Nslookup App

• DNS Query Length Outliers - MLTK

• DNS Query Length With High Standard Deviation

• Detect hosts connecting to dynamic domain providers

• Excessive DNS Failures

• Excessive Usage of NSLOOKUP App

• Get DNS Server History for a host

• Get DNS traffic ratio

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Get Process Responsible For The DNS Traffic

ATT&CK

ID	Technique	Tactic
T1048	Exfiltration Over Alternative Protocol	Exfiltration
T1071.004	DNS	Command And Control
T1048.003	Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol	Exfiltration
T1095	Non-Application Layer Protocol	Command And Control
T1041	Exfiltration Over C2 Channel	Exfiltration
T1189	Drive-by Compromise	Initial Access
T1537	Transfer Data to Cloud Account	Exfiltration
T1114.001	Local Email Collection	Collection
T1114	Email Collection	Collection
T1114.003	Email Forwarding Rule	Collection
T1071.001	Web Protocols	Command And Control

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Exploitation

Reference

• http://blogs.splunk.com/2015/10/01/random-words-on-entropy-and-dns/

• http://www.darkreading.com/analytics/security-monitoring/got-malware-three-signs-revealed-in-dns-traffic/d/d-id/1139680

• https://live.paloaltonetworks.com/t5/Threat-Vulnerability-Articles/What-are-suspicious-DNS-queries/ta-p/71454

version: 1

---

Suspicious Emails

Email remains one of the primary means for attackers to gain an initial foothold within the modern enterprise. Detect and investigate suspicious emails in your environment with the help of the searches in this Analytic Story.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Email
• ATT&CK: T1566.001
• Last Updated: 2020-01-27

details

Detection Profile

• DNSTwist Domain Names

• Email Attachments With Lots Of Spaces

• Get Email Info

• Get Emails From Specific Sender

• Get Notable History

• Monitor Email For Brand Abuse

• Suspicious Email Attachment Extensions

ATT&CK

ID	Technique	Tactic
T1566.001	Spearphishing Attachment	Initial Access

Kill Chain Phase

• Delivery

Reference

• https://www.splunk.com/blog/2015/06/26/phishing-hits-a-new-level-of-quality/

version: 1

---

Suspicious MSHTA Activity

Monitor and detect techniques used by attackers who leverage the mshta.exe process to execute malicious code.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1059, T1059.003, T1218.005, T1547.001
• Last Updated: 2021-01-20

details

Detection Profile

• Baseline of Command Line Length - MLTK

• Detect MSHTA Url in Command Line

• Detect Prohibited Applications Spawning cmd exe

• Detect Rundll32 Inline HTA Execution

• Detect mshta inline hta execution

• Detect mshta renamed

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Previously seen command line arguments

• Registry Keys Used For Persistence

• Suspicious mshta child process

• Suspicious mshta spawn

ATT&CK

ID	Technique	Tactic
T1218.005	Mshta	Defense Evasion
T1059.003	Windows Command Shell	Execution
T1059	Command and Scripting Interpreter	Execution
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://redcanary.com/blog/introducing-atomictestharnesses/

• https://redcanary.com/blog/windows-registry-attacks-threat-detection/

• https://attack.mitre.org/techniques/T1218/005/

• https://medium.com/@mbromileyDFIR/malware-monday-aebb456356c5

version: 2

---

Suspicious Okta Activity

Monitor your Okta environment for suspicious activities. Due to the Covid outbreak, many users are migrating over to leverage cloud services more and more. Okta is a popular tool to manage multiple users and the web-based applications they need to stay productive. The searches in this story will help monitor your Okta environment for suspicious activities and associated user behaviors.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1078.001
• Last Updated: 2020-04-02

details

Detection Profile

• Investigate Okta Activity by IP Address

• Investigate Okta Activity by app

• Investigate User Activities In Okta

• Multiple Okta Users With Invalid Credentials From The Same IP

• Okta Account Lockout Events

• Okta Failed SSO Attempts

• Okta User Logins From Multiple Cities

ATT&CK

ID	Technique	Tactic
T1078.001	Default Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access

Kill Chain Phase

Reference

• https://attack.mitre.org/wiki/Technique/T1078

• https://owasp.org/www-community/attacks/Credential_stuffing

• https://searchsecurity.techtarget.com/answer/What-is-a-password-spraying-attack-and-how-does-it-work

version: 1

---

Suspicious Regsvcs Regasm Activity

Monitor and detect techniques used by attackers who leverage the mshta.exe process to execute malicious code.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1218.009
• Last Updated: 2021-02-11

details

Detection Profile

• Detect Regasm Spawning a Process

• Detect Regasm with Network Connection

• Detect Regasm with no Command Line Arguments

• Detect Regsvcs Spawning a Process

• Detect Regsvcs with Network Connection

• Detect Regsvcs with No Command Line Arguments

ATT&CK

ID	Technique	Tactic
T1218.009	Regsvcs/Regasm	Defense Evasion

Kill Chain Phase

• Actions on Objectives

Reference

• https://attack.mitre.org/techniques/T1218/009/

• https://github.com/rapid7/metasploit-framework/blob/master/documentation/modules/evasion/windows/applocker_evasion_regasm_regsvcs.md

• https://oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/

version: 1

---

Suspicious Regsvr32 Activity

Monitor and detect techniques used by attackers who leverage the regsvr32.exe process to execute malicious code.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1218.010
• Last Updated: 2021-01-29

details

Detection Profile

• Detect Regsvr32 Application Control Bypass

• Suspicious Regsvr32 Register Suspicious Path

ATT&CK

ID	Technique	Tactic
T1218.010	Regsvr32	Defense Evasion

Kill Chain Phase

• Actions on Objectives

Reference

• https://attack.mitre.org/techniques/T1218/010/

• https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.010/T1218.010.md

• https://lolbas-project.github.io/lolbas/Binaries/Regsvr32/

version: 1

---

Suspicious Rundll32 Activity

Monitor and detect techniques used by attackers who leverage rundll32.exe to execute arbitrary malicious code.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1003.001, T1036.003, T1218.011
• Last Updated: 2021-02-03

details

Detection Profile

• Detect Rundll32 Application Control Bypass - advpack

• Detect Rundll32 Application Control Bypass - setupapi

• Detect Rundll32 Application Control Bypass - syssetup

• Dump LSASS via comsvcs DLL

• Rundll32 with no Command Line Arguments with Network

• Suspicious Rundll32 Rename

• Suspicious Rundll32 StartW

• Suspicious Rundll32 dllregisterserver

• Suspicious Rundll32 no Command Line Arguments

ATT&CK

ID	Technique	Tactic
T1218.011	Rundll32	Defense Evasion
T1003.001	LSASS Memory	Credential Access
T1036.003	Rename System Utilities	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1218/011/

• https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.011/T1218.011.md

• https://lolbas-project.github.io/lolbas/Binaries/Rundll32

version: 1

---

Suspicious WMI Use

Attackers are increasingly abusing Windows Management Instrumentation (WMI), a framework and associated utilities available on all modern Windows operating systems. Because WMI can be leveraged to manage both local and remote systems, it is important to identify the processes executed and the user context within which the activity occurred.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1047, T1546.003
• Last Updated: 2018-10-23

details

Detection Profile

• Detect WMI Event Subscription Persistence

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Get Sysmon WMI Activity for Host

• Process Execution via WMI

• Remote Process Instantiation via WMI

• Remote WMI Command Attempt

• Script Execution via WMI

• WMI Permanent Event Subscription

• WMI Permanent Event Subscription - Sysmon

• WMI Temporary Event Subscription

ATT&CK

ID	Technique	Tactic
T1546.003	Windows Management Instrumentation Event Subscription	Privilege Escalation, Persistence
T1047	Windows Management Instrumentation	Execution

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://www.blackhat.com/docs/us-15/materials/us-15-Graeber-Abusing-Windows-Management-Instrumentation-WMI-To-Build-A-Persistent%20Asynchronous-And-Fileless-Backdoor-wp.pdf

• https://www.fireeye.com/blog/threat-research/2017/03/wmimplant_a_wmi_ba.html

version: 2

---

Suspicious Windows Registry Activities

Monitor and detect registry changes initiated from remote locations, which can be a sign that an attacker has infiltrated your system.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1546.011, T1546.012, T1547.001, T1547.010, T1548.002
• Last Updated: 2018-05-31

details

Detection Profile

• Disabling Remote User Account Control

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Monitor Registry Keys for Print Monitors

• Registry Keys Used For Persistence

• Registry Keys Used For Privilege Escalation

• Registry Keys for Creating SHIM Databases

ATT&CK

ID	Technique	Tactic
T1548.002	Bypass User Account Control	Privilege Escalation, Defense Evasion
T1547.010	Port Monitors	Persistence, Privilege Escalation
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation
T1546.012	Image File Execution Options Injection	Privilege Escalation, Persistence
T1546.011	Application Shimming	Privilege Escalation, Persistence

Kill Chain Phase

• Actions on Objectives

Reference

• https://redcanary.com/blog/windows-registry-attacks-threat-detection/

• https://attack.mitre.org/wiki/Technique/T1112

version: 1

---

Suspicious Zoom Child Processes

Attackers are using Zoom as an vector to increase privileges on a sytems. This story detects new child processes of zoom and provides investigative actions for this detection.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1059, T1059.003, T1068
• Last Updated: 2020-04-13

details

Detection Profile

• Detect Prohibited Applications Spawning cmd exe

• First Time Seen Child Process of Zoom

• Get Process File Activity

• Previously Seen Zoom Child Processes - Initial

• Previously Seen Zoom Child Processes - Update

ATT&CK

ID	Technique	Tactic
T1059.003	Windows Command Shell	Execution
T1059	Command and Scripting Interpreter	Execution
T1068	Exploitation for Privilege Escalation	Privilege Escalation
T1036.003	Rename System Utilities	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://blog.rapid7.com/2020/04/02/dispelling-zoom-bugbears-what-you-need-to-know-about-the-latest-zoom-vulnerabilities/

• https://threatpost.com/two-zoom-zero-day-flaws-uncovered/154337/

version: 1

---

Trusted Developer Utilities Proxy Execution

Monitor and detect behaviors used by attackers who leverage trusted developer utilities to execute malicious code.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1036.003, T1127
• Last Updated: 2021-01-12

details

Detection Profile

• Suspicious microsoft workflow compiler rename

• Suspicious microsoft workflow compiler usage

ATT&CK

ID	Technique	Tactic
T1127	Trusted Developer Utilities Proxy Execution	Defense Evasion
T1036.003	Rename System Utilities	Defense Evasion

Kill Chain Phase

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1127/

• https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218/T1218.md

• https://lolbas-project.github.io/lolbas/Binaries/Microsoft.Workflow.Compiler/

version: 1

---

Trusted Developer Utilities Proxy Execution MSBuild

Monitor and detect techniques used by attackers who leverage the msbuild.exe process to execute malicious code.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1036.003, T1127.001
• Last Updated: 2021-01-21

details

Detection Profile

• Suspicious MSBuild Rename

• Suspicious MSBuild Spawn

• Suspicious msbuild path

ATT&CK

ID	Technique	Tactic
T1127.001	MSBuild	Defense Evasion
T1036.003	Rename System Utilities	Defense Evasion

Kill Chain Phase

• Exploitation

Reference

• https://attack.mitre.org/techniques/T1127/001/

• https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1127.001/T1127.001.md

• https://github.com/infosecn1nja/MaliciousMacroMSBuild

• https://github.com/xorrior/RandomPS-Scripts/blob/master/Invoke-ExecuteMSBuild.ps1

• https://lolbas-project.github.io/lolbas/Binaries/Msbuild/

• https://github.com/MHaggis/CBR-Queries/blob/master/msbuild.md

version: 1

---

Windows DNS SIGRed CVE-2020-1350

Uncover activity consistent with CVE-2020-1350, or SIGRed. Discovered by Checkpoint researchers, this vulnerability affects Windows 2003 to 2019, and is triggered by a malicious DNS response (only affects DNS over TCP). An attacker can use the malicious payload to cause a buffer overflow on the vulnerable system, leading to compromise. The included searches in this Analytic Story are designed to identify the large response payload for SIG and KEY DNS records which can be used for the exploit.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Network_Resolution
• ATT&CK: T1203
• Last Updated: 2020-07-28

details

Detection Profile

• Detect Windows DNS SIGRed via Splunk Stream

• Detect Windows DNS SIGRed via Zeek

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1203	Exploitation for Client Execution	Execution

Kill Chain Phase

• Exploitation

Reference

• https://research.checkpoint.com/2020/resolving-your-way-into-domain-admin-exploiting-a-17-year-old-bug-in-windows-dns-servers/

• https://support.microsoft.com/en-au/help/4569509/windows-dns-server-remote-code-execution-vulnerability

version: 1

---

Windows Defense Evasion Tactics

Detect tactics used by malware to evade defenses on Windows endpoints. A few of these include suspicious reg.exe processes, files hidden with attrib.exe and disabling user-account control, among many others

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1036, T1112, T1222.001, T1548.002, T1562.001, T1564.001
• Last Updated: 2018-05-31

details

Detection Profile

• Disable Registry Tool

• Disable Show Hidden Files

• Disable Windows Behavior Monitoring

• Disable Windows SmartScreen Protection

• Disabling CMD Application

• Disabling ControlPanel

• Disabling Firewall with Netsh

• Disabling FolderOptions Windows Feature

• Disabling NoRun Windows App

• Disabling Remote User Account Control

• Disabling SystemRestore In Registry

• Disabling Task Manager

• Eventvwr UAC Bypass

• Excessive number of service control start as disabled

• FodHelper UAC Bypass

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Hiding Files And Directories With Attrib exe

• NET Profiler UAC bypass

• SLUI RunAs Elevated

• SLUI Spawning a Process

• Sdclt UAC Bypass

• SilentCleanup UAC Bypass

• Suspicious Reg exe Process

• System Process Running from Unexpected Location

• UAC Bypass MMC Load Unsigned Dll

• WSReset UAC Bypass

• Windows DisableAntiSpyware Registry

ATT&CK

ID	Technique	Tactic
T1562.001	Disable or Modify Tools	Defense Evasion
T1564.001	Hidden Files and Directories	Defense Evasion
T1548.002	Bypass User Account Control	Privilege Escalation, Defense Evasion
T1112	Modify Registry	Defense Evasion
T1222.001	Windows File and Directory Permissions Modification	Defense Evasion
T1036	Masquerading	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Delivery

• Exploitation

• Privilege Escalation

Reference

• https://attack.mitre.org/wiki/Defense_Evasion

version: 1

---

Windows Discovery Techniques

Monitors for behaviors associated with adversaries discovering objects in the environment that can be leveraged in the progression of the attack.

• Product: Splunk Behavioral Analytics, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1007, T1012, T1021.002, T1039, T1046, T1047, T1053, T1055, T1057, T1068, T1078, T1083, T1087, T1098, T1135, T1199, T1482, T1484, T1518, T1543, T1547, T1574, T1589.001, T1590, T1590.001, T1590.003, T1591, T1592, T1592.002, T1595, T1595.002
• Last Updated: 2021-03-04

details

Detection Profile

• Reconnaissance and Access to Accounts Groups and Policies via PowerSploit modules

• Reconnaissance and Access to Accounts and Groups via Mimikatz modules

• Reconnaissance and Access to Active Directoty Infrastructure via PowerSploit modules

• Reconnaissance and Access to Computers and Domains via PowerSploit modules

• Reconnaissance and Access to Computers via Mimikatz modules

• Reconnaissance and Access to Operating System Elements via PowerSploit modules

• Reconnaissance and Access to Processes and Services via Mimikatz modules

• Reconnaissance and Access to Shared Resources via Mimikatz modules

• Reconnaissance and Access to Shared Resources via PowerSploit modules

• Reconnaissance of Access and Persistence Opportunities via PowerSploit modules

• Reconnaissance of Connectivity via PowerSploit modules

• Reconnaissance of Credential Stores and Services via Mimikatz modules

• Reconnaissance of Defensive Tools via PowerSploit modules

• Reconnaissance of Privilege Escalation Opportunities via PowerSploit modules

• Reconnaissance of Process or Service Hijacking Opportunities via Mimikatz modules

ATT&CK

ID	Technique	Tactic
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1087	Account Discovery	Discovery
T1484	Domain Policy Modification	Defense Evasion, Privilege Escalation
T1199	Trusted Relationship	Initial Access
T1482	Domain Trust Discovery	Discovery
T1590	Gather Victim Network Information	Reconnaissance
T1591	Gather Victim Org Information	Reconnaissance
T1595	Active Scanning	Reconnaissance
T1592	Gather Victim Host Information	Reconnaissance
T1007	System Service Discovery	Discovery
T1012	Query Registry	Discovery
T1046	Network Service Scanning	Discovery
T1047	Windows Management Instrumentation	Execution
T1057	Process Discovery	Discovery
T1083	File and Directory Discovery	Discovery
T1518	Software Discovery	Discovery
T1592.002	Software	Reconnaissance
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1135	Network Share Discovery	Discovery
T1039	Data from Network Shared Drive	Collection
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1068	Exploitation for Privilege Escalation	Privilege Escalation
T1543	Create or Modify System Process	Persistence, Privilege Escalation
T1547	Boot or Logon Autostart Execution	Persistence, Privilege Escalation
T1574	Hijack Execution Flow	Persistence, Privilege Escalation, Defense Evasion
T1589.001	Credentials	Reconnaissance
T1590.001	Domain Properties	Reconnaissance
T1590.003	Network Trust Dependencies	Reconnaissance
T1098	Account Manipulation	Persistence
T1595.002	Vulnerability Scanning	Reconnaissance
T1055	Process Injection	Defense Evasion, Privilege Escalation

Kill Chain Phase

• Actions on Objectives

Reference

• https://attack.mitre.org/tactics/TA0007/

• https://cyberd.us/penetration-testing

• https://attack.mitre.org/software/S0521/

version: 1

---

Windows Log Manipulation

Adversaries often try to cover their tracks by manipulating Windows logs. Use these searches to help you monitor for suspicious activity surrounding log files--an essential component of an effective defense.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1070, T1070.001, T1490
• Last Updated: 2017-09-12

details

Detection Profile

• Deleting Shadow Copies

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Illegal Deletion of Logs via Mimikatz modules

• Suspicious Event Log Service Behavior

• Suspicious wevtutil Usage

• USN Journal Deletion

• WevtUtil Usage To Clear Logs

• Wevtutil Usage To Disable Logs

• Windows Event Log Cleared

ATT&CK

ID	Technique	Tactic
T1490	Inhibit System Recovery	Impact
T1070	Indicator Removal on Host	Defense Evasion
T1070.001	Clear Windows Event Logs	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://www.crowdstrike.com/blog/bears-midst-intrusion-democratic-national-committee/

• https://zeltser.com/security-incident-log-review-checklist/

• http://journeyintoir.blogspot.com/2013/01/re-introducing-usnjrnl.html

version: 2

---

Windows Persistence Techniques

Monitor for activities and techniques associated with maintaining persistence on a Windows system--a sign that an adversary may have compromised your environment.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1053, T1053.005, T1068, T1078, T1098, T1134, T1207, T1222.001, T1484, T1543.003, T1546.011, T1547.001, T1547.010, T1548, T1574.009, T1574.011, T1585
• Last Updated: 2018-05-31

details

Detection Profile

• Certutil exe certificate extraction

• Detect Path Interception By Creation Of program exe

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Hiding Files And Directories With Attrib exe

• Illegal Account Creation via PowerSploit modules

• Illegal Enabling or Disabling of Accounts via DSInternals modules

• Illegal Management of Active Directory Elements and Policies via DSInternals modules

• Illegal Management of Computers and Active Directory Elements via PowerSploit modules

• Illegal Privilege Elevation and Persistence via PowerSploit modules

• Monitor Registry Keys for Print Monitors

• Reg exe Manipulating Windows Services Registry Keys

• Registry Keys Used For Persistence

• Registry Keys for Creating SHIM Databases

• Sc exe Manipulating Windows Services

• Schedule Task with HTTP Command Arguments

• Schedule Task with Rundll32 Command Trigger

• Schtasks used for forcing a reboot

• Setting Credentials via DSInternals modules

• Setting Credentials via Mimikatz modules

• Setting Credentials via PowerSploit modules

• Shim Database File Creation

• Shim Database Installation With Suspicious Parameters

• Suspicious Scheduled Task from Public Directory

• WinEvent Scheduled Task Created Within Public Path

• WinEvent Scheduled Task Created to Spawn Shell

ATT&CK

ID	Technique	Tactic
T1574.009	Path Interception by Unquoted Path	Persistence, Privilege Escalation, Defense Evasion
T1222.001	Windows File and Directory Permissions Modification	Defense Evasion
T1585	Establish Accounts	Resource Development
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1098	Account Manipulation	Persistence
T1207	Rogue Domain Controller	Defense Evasion
T1484	Domain Policy Modification	Defense Evasion, Privilege Escalation
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1134	Access Token Manipulation	Defense Evasion, Privilege Escalation
T1548	Abuse Elevation Control Mechanism	Privilege Escalation, Defense Evasion
T1547.010	Port Monitors	Persistence, Privilege Escalation
T1574.011	Services Registry Permissions Weakness	Persistence, Privilege Escalation, Defense Evasion
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation
T1546.011	Application Shimming	Privilege Escalation, Persistence
T1543.003	Windows Service	Persistence, Privilege Escalation
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation
T1068	Exploitation for Privilege Escalation	Privilege Escalation

Kill Chain Phase

• Actions on Objectives

• Exploitation

• Installation

• Privilege Escalation

Reference

• http://www.fuzzysecurity.com/tutorials/19.html

• https://www.fireeye.com/blog/threat-research/2010/07/malware-persistence-windows-registry.html

• http://resources.infosecinstitute.com/common-malware-persistence-mechanisms/

• https://www.fireeye.com/blog/threat-research/2017/05/fin7-shim-databases-persistence.html

• https://www.youtube.com/watch?v=dq2Hv7J9fvk

version: 2

---

Windows Privilege Escalation

Monitor for and investigate activities that may be associated with a Windows privilege-escalation attack, including unusual processes running on endpoints, modified registry keys, and more.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1068, T1078, T1098, T1134, T1546.008, T1546.012, T1548
• Last Updated: 2020-02-04

details

Detection Profile

• Child Processes of Spoolsv exe

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Illegal Privilege Elevation via Mimikatz modules

• Overwriting Accessibility Binaries

• Probing Access with Stolen Credentials via PowerSploit modules

• Registry Keys Used For Privilege Escalation

ATT&CK

ID	Technique	Tactic
T1068	Exploitation for Privilege Escalation	Privilege Escalation
T1134	Access Token Manipulation	Defense Evasion, Privilege Escalation
T1548	Abuse Elevation Control Mechanism	Privilege Escalation, Defense Evasion
T1546.008	Accessibility Features	Privilege Escalation, Persistence
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1098	Account Manipulation	Persistence
T1546.012	Image File Execution Options Injection	Privilege Escalation, Persistence

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://attack.mitre.org/tactics/TA0004/

version: 2

---

Best Practices

details

Asset Tracking

Keep a careful inventory of every asset on your network to make it easier to detect rogue devices. Unauthorized/unmanaged devices could be an indication of malicious behavior that should be investigated further.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Network_Sessions
• ATT&CK:
• Last Updated: 2017-09-13

details

Detection Profile

• Count of assets by category

• Detect Unauthorized Assets by MAC address

• Get First Occurrence and Last Occurrence of a MAC Address

• Get Notable History

ATT&CK

ID	Technique	Tactic

Kill Chain Phase

• Actions on Objectives

• Delivery

• Reconnaissance

Reference

• https://www.cisecurity.org/controls/inventory-of-authorized-and-unauthorized-devices/

version: 1

---

Monitor for Updates

Monitor your enterprise to ensure that your endpoints are being patched and updated. Adversaries notoriously exploit known vulnerabilities that could be mitigated by applying routine security patches.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Updates
• ATT&CK:
• Last Updated: 2017-09-15

details

Detection Profile

• Get Notable History

• No Windows Updates in a time frame

ATT&CK

ID	Technique	Tactic

Kill Chain Phase

Reference

• https://learn.cisecurity.org/20-controls-download

version: 1

---

Prohibited Traffic Allowed or Protocol Mismatch

Detect instances of prohibited network traffic allowed in the environment, as well as protocols running on non-standard ports. Both of these types of behaviors typically violate policy and can be leveraged by attackers.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Resolution, Network_Traffic
• ATT&CK: T1021, T1021.001, T1048, T1048.003, T1071.001, T1189
• Last Updated: 2017-09-11

details

Detection Profile

• Allow Inbound Traffic By Firewall Rule Registry

• Allow Inbound Traffic In Firewall Rule

• Detect hosts connecting to dynamic domain providers

• Enable RDP In Other Port Number

• Get DNS Server History for a host

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Get Process Information For Port Activity

• Prohibited Network Traffic Allowed

• Protocol or Port Mismatch

• TOR Traffic

ATT&CK

ID	Technique	Tactic
T1021.001	Remote Desktop Protocol	Lateral Movement
T1189	Drive-by Compromise	Initial Access
T1021	Remote Services	Lateral Movement
T1048	Exfiltration Over Alternative Protocol	Exfiltration
T1048.003	Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol	Exfiltration
T1071.001	Web Protocols	Command And Control

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Delivery

• Exploitation

Reference

• http://www.novetta.com/2015/02/advanced-methods-to-detect-advanced-cyber-attacks-protocol-abuse/

version: 1

---

Router and Infrastructure Security

Validate the security configuration of network infrastructure and verify that only authorized users and systems are accessing critical assets. Core routing and switching infrastructure are common strategic targets for attackers.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Authentication, Network_Traffic
• ATT&CK: T1020.001, T1200, T1498, T1542.005, T1557, T1557.002
• Last Updated: 2017-09-12

details

Detection Profile

• Detect ARP Poisoning

• Detect IPv6 Network Infrastructure Threats

• Detect New Login Attempts to Routers

• Detect Port Security Violation

• Detect Rogue DHCP Server

• Detect Software Download To Network Device

• Detect Traffic Mirroring

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1200	Hardware Additions	Initial Access
T1498	Network Denial of Service	Impact
T1557.002	ARP Cache Poisoning	Credential Access, Collection
T1557	Man-in-the-Middle	Credential Access, Collection
T1542.005	TFTP Boot	Defense Evasion, Persistence
T1020.001	Traffic Duplication	Exfiltration

Kill Chain Phase

• Actions on Objectives

• Delivery

• Exploitation

• Reconnaissance

Reference

• https://www.fireeye.com/blog/executive-perspective/2015/09/the_new_route_toper.html

• https://www.cisco.com/c/en/us/about/security-center/event-response/synful-knock.html

version: 1

---

Use of Cleartext Protocols

Leverage searches that detect cleartext network protocols that may leak credentials or should otherwise be encrypted.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK:
• Last Updated: 2017-09-15

details

Detection Profile

• Get Notable History

• Get Process Information For Port Activity

• Protocols passing authentication in cleartext

ATT&CK

ID	Technique	Tactic

Kill Chain Phase

• Actions on Objectives

• Reconnaissance

Reference

• https://www.monkey.org/~dugsong/dsniff/

version: 1

---

Cloud Security

details

AWS Cross Account Activity

Track when a user assumes an IAM role in another AWS account to obtain cross-account access to services and resources in that account. Accessing new roles could be an indication of malicious activity.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1078, T1550
• Last Updated: 2018-06-04

details

Detection Profile

• AWS Investigate User Activities By AccessKeyId

• Get Notable History

• Previously Seen AWS Cross Account Activity

• aws detect attach to role policy

• aws detect permanent key creation

• aws detect role creation

• aws detect sts assume role abuse

• aws detect sts get session token abuse

ATT&CK

ID	Technique	Tactic
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1550	Use Alternate Authentication Material	Defense Evasion, Lateral Movement

Kill Chain Phase

• Lateral Movement

Reference

• https://aws.amazon.com/blogs/security/aws-cloudtrail-now-tracks-cross-account-activity-to-its-origin/

version: 1

---

AWS IAM Privilege Escalation

This analytic story contains detections that query your AWS Cloudtrail for activities related to privilege escalation.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1069.003, T1078.004, T1098, T1110, T1136.003, T1580
• Last Updated: 2021-03-08

details

Detection Profile

• AWS Create Policy Version to allow all resources

• AWS CreateAccessKey

• AWS CreateLoginProfile

• AWS IAM Assume Role Policy Brute Force

• AWS IAM Delete Policy

• AWS IAM Failure Group Deletion

• AWS IAM Successful Group Deletion

• AWS SetDefaultPolicyVersion

• AWS UpdateLoginProfile

ATT&CK

ID	Technique	Tactic
T1078.004	Cloud Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1136.003	Cloud Account	Persistence
T1580	Cloud Infrastructure Discovery	Discovery
T1110	Brute Force	Credential Access
T1098	Account Manipulation	Persistence
T1069.003	Cloud Groups	Discovery

Kill Chain Phase

• Actions on Objectives

• Reconnaissance

Reference

• https://rhinosecuritylabs.com/aws/aws-privilege-escalation-methods-mitigation/

• https://www.cyberark.com/resources/threat-research-blog/the-cloud-shadow-admin-threat-10-permissions-to-protect

• https://labs.bishopfox.com/tech-blog/privilege-escalation-in-aws

version: 1

---

AWS Network ACL Activity

Monitor your AWS network infrastructure for bad configurations and malicious activity. Investigative searches help you probe deeper, when the facts warrant it.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK: T1562.007
• Last Updated: 2018-05-21

details

Detection Profile

• AWS Investigate User Activities By ARN

• AWS Network ACL Details from ID

• AWS Network Access Control List Created with All Open Ports

• AWS Network Access Control List Deleted

• AWS Network Interface details via resourceId

• Baseline of Network ACL Activity by ARN

• Baseline of blocked outbound traffic from AWS

• Detect Spike in blocked Outbound Traffic from your AWS

• Get All AWS Activity From IP Address

• Get DNS Server History for a host

• Get DNS traffic ratio

• Get Notable History

• Get Process Info

• Get Process Information For Port Activity

• Get Process Responsible For The DNS Traffic

ATT&CK

ID	Technique	Tactic
T1562.007	Disable or Modify Cloud Firewall	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Command and Control

Reference

• https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Appendix_NACLs.html

• https://aws.amazon.com/blogs/security/how-to-help-prepare-for-ddos-attacks-by-reducing-your-attack-surface/

version: 2

---

AWS Security Hub Alerts

This story is focused around detecting Security Hub alerts generated from AWS

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK:
• Last Updated: 2020-08-04

details

Detection Profile

• AWS Investigate User Activities By ARN

• Detect Spike in AWS Security Hub Alerts for EC2 Instance

• Detect Spike in AWS Security Hub Alerts for User

• Get EC2 Instance Details by instanceId

• Get EC2 Launch Details

ATT&CK

ID	Technique	Tactic

Kill Chain Phase

Reference

• https://aws.amazon.com/security-hub/features/

version: 1

---

AWS User Monitoring

Detect and investigate dormant user accounts for your AWS environment that have become active again. Because inactive and ad-hoc accounts are common attack targets, it's critical to enable governance within your environment.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1526
• Last Updated: 2018-03-12

details

Detection Profile

• AWS Excessive Security Scanning

• Baseline of API Calls per User ARN

• Baseline of Security Group Activity by ARN

• Create a list of approved AWS service accounts

• Get Notable History

• Investigate AWS User Activities by user field

• Previously seen API call per user roles in CloudTrail

ATT&CK

ID	Technique	Tactic
T1526	Cloud Service Discovery	Discovery

Kill Chain Phase

• Actions on Objectives

Reference

• https://d0.awsstatic.com/whitepapers/aws-security-best-practices.pdf

• https://redlock.io/blog/cryptojacking-tesla

version: 1

---

Cloud Cryptomining

Monitor your cloud compute instances for activities related to cryptojacking/cryptomining. New instances that originate from previously unseen regions, users who launch abnormally high numbers of instances, or compute instances started by previously unseen users are just a few examples of potentially malicious behavior.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Change
• ATT&CK: T1078.004, T1535
• Last Updated: 2019-10-02

details

Detection Profile

• AWS Investigate Security Hub alerts by dest

• AWS Investigate User Activities By ARN

• Abnormally High Number Of Cloud Instances Launched

• Baseline Of Cloud Instances Destroyed

• Baseline Of Cloud Instances Launched

• Cloud Compute Instance Created By Previously Unseen User

• Cloud Compute Instance Created In Previously Unused Region

• Cloud Compute Instance Created With Previously Unseen Image

• Cloud Compute Instance Created With Previously Unseen Instance Type

• Get EC2 Instance Details by instanceId

• Get EC2 Launch Details

• Get Notable History

• Investigate AWS activities via region name

• Previously Seen Cloud Compute Creations By User - Initial

• Previously Seen Cloud Compute Creations By User - Update

• Previously Seen Cloud Compute Images - Initial

• Previously Seen Cloud Compute Images - Update

• Previously Seen Cloud Compute Instance Types - Initial

• Previously Seen Cloud Compute Instance Types - Update

• Previously Seen Cloud Regions - Initial

• Previously Seen Cloud Regions - Update

ATT&CK

ID	Technique	Tactic
T1078.004	Cloud Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1535	Unused/Unsupported Cloud Regions	Defense Evasion

Kill Chain Phase

• Actions on Objectives

Reference

• https://d0.awsstatic.com/whitepapers/aws-security-best-practices.pdf

version: 1

---

Cloud Federated Credential Abuse

This analytical story addresses events that indicate abuse of cloud federated credentials. These credentials are usually extracted from endpoint desktop or servers specially those servers that provide federation services such as Windows Active Directory Federation Services. Identity Federation relies on objects such as Oauth2 tokens, cookies or SAML assertions in order to provide seamless access between cloud and perimeter environments. If these objects are either hijacked or forged then attackers will be able to pivot into victim's cloud environements.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1003.001, T1078, T1136.003, T1546.012, T1556
• Last Updated: 2021-01-26

details

Detection Profile

• AWS SAML Access by Provider User and Principal

• AWS SAML Update identity provider

• Certutil exe certificate extraction

• Detect Mimikatz Using Loaded Images

• Detect Rare Executables

• O365 Add App Role Assignment Grant User

• O365 Added Service Principal

• O365 Excessive SSO logon errors

• O365 New Federated Domain Added

• Registry Keys Used For Privilege Escalation

ATT&CK

ID	Technique	Tactic
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1003.001	LSASS Memory	Credential Access
T1136.003	Cloud Account	Persistence
T1556	Modify Authentication Process	Credential Access, Defense Evasion, Persistence
T1546.012	Image File Execution Options Injection	Privilege Escalation, Persistence

Kill Chain Phase

• Actions on Objective

• Actions on Objectives

• Command and Control

• Installation

Reference

• https://www.cyberark.com/resources/threat-research-blog/golden-saml-newly-discovered-attack-technique-forges-authentication-to-cloud-apps

• https://www.fireeye.com/content/dam/fireeye-www/blog/pdfs/wp-m-unc2452-2021-000343-01.pdf

• https://us-cert.cisa.gov/ncas/alerts/aa21-008a

version: 1

---

Container Implantation Monitoring and Investigation

Use the searches in this story to monitor your Kubernetes registry repositories for upload, and deployment of potentially vulnerable, backdoor, or implanted containers. These searches provide information on source users, destination path, container names and repository names. The searches provide context to address Mitre T1525 which refers to container implantation upload to a company's repository either in Amazon Elastic Container Registry, Google Container Registry and Azure Container Registry.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1525
• Last Updated: 2020-02-20

details

Detection Profile

• New container uploaded to AWS ECR

ATT&CK

ID	Technique	Tactic
T1525	Implant Internal Image	Persistence

Kill Chain Phase

Reference

• https://github.com/splunk/cloud-datamodel-security-research

version: 1

---

Dev Sec Ops

This story is focused around detecting attacks on a DevSecOps lifeccycle which consists of the phases plan, code, build, test, release, deploy, operate and monitor.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1204.003, T1212, T1526
• Last Updated: 2021-08-18

details

Detection Profile

• AWS ECR Container Scanning Findings High

• AWS ECR Container Scanning Findings Low Informational Unknown

• AWS ECR Container Scanning Findings Medium

• AWS ECR Container Upload Outside Business Hours

• AWS ECR Container Upload Unknown User

• Kubernetes Nginx Ingress LFI

• Kubernetes Nginx Ingress RFI

• Kubernetes Scanner Image Pulling

ATT&CK

ID	Technique	Tactic
T1204.003	Malicious Image	Execution
T1212	Exploitation for Credential Access	Credential Access
T1526	Cloud Service Discovery	Discovery

Kill Chain Phase

• Actions on Objectives

Reference

• https://www.redhat.com/en/topics/devops/what-is-devsecops

version: 1

---

GCP Cross Account Activity

Track when a user assumes an IAM role in another GCP account to obtain cross-account access to services and resources in that account. Accessing new roles could be an indication of malicious activity.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1078
• Last Updated: 2020-09-01

details

Detection Profile

• GCP Detect gcploit framework

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access

Kill Chain Phase

• Lateral Movement

Reference

• https://cloud.google.com/iam/docs/understanding-service-accounts

version: 1

---

Kubernetes Scanning Activity

This story addresses detection against Kubernetes cluster fingerprint scan and attack by providing information on items such as source ip, user agent, cluster names.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1526
• Last Updated: 2020-04-15

details

Detection Profile

• Amazon EKS Kubernetes Pod scan detection

• Amazon EKS Kubernetes activity by src ip

• Amazon EKS Kubernetes cluster scan detection

• GCP Kubernetes activity by src ip

• GCP Kubernetes cluster pod scan detection

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1526	Cloud Service Discovery	Discovery

Kill Chain Phase

• Reconnaissance

Reference

• https://github.com/splunk/cloud-datamodel-security-research

version: 1

---

Kubernetes Sensitive Object Access Activity

This story addresses detection and response of accounts acccesing Kubernetes cluster sensitive objects such as configmaps or secrets providing information on items such as user user, group. object, namespace and authorization reason.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK:
• Last Updated: 2020-05-20

details

Detection Profile

• Get Notable History

• Kubernetes AWS detect suspicious kubectl calls

ATT&CK

ID	Technique	Tactic

Kill Chain Phase

• Lateral Movement

Reference

• https://www.splunk.com/en_us/blog/security/approaching-kubernetes-security-detecting-kubernetes-scan-with-splunk.html

version: 1

---

Office 365 Detections

This story is focused around detecting Office 365 Attacks.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1110, T1110.001, T1114, T1114.002, T1114.003, T1136.003, T1556, T1562.007
• Last Updated: 2020-12-16

details

Detection Profile

• High Number of Login Failures from a single source

• O365 Add App Role Assignment Grant User

• O365 Added Service Principal

• O365 Bypass MFA via Trusted IP

• O365 Disable MFA

• O365 Excessive Authentication Failures Alert

• O365 Excessive SSO logon errors

• O365 New Federated Domain Added

• O365 PST export alert

• O365 Suspicious Admin Email Forwarding

• O365 Suspicious Rights Delegation

• O365 Suspicious User Email Forwarding

ATT&CK

ID	Technique	Tactic
T1110.001	Password Guessing	Credential Access
T1136.003	Cloud Account	Persistence
T1562.007	Disable or Modify Cloud Firewall	Defense Evasion
T1556	Modify Authentication Process	Credential Access, Defense Evasion, Persistence
T1110	Brute Force	Credential Access
T1114	Email Collection	Collection
T1114.003	Email Forwarding Rule	Collection
T1114.002	Remote Email Collection	Collection

Kill Chain Phase

• Actions on Objective

• Actions on Objectives

• Not Applicable

Reference

• https://i.blackhat.com/USA-20/Thursday/us-20-Bienstock-My-Cloud-Is-APTs-Cloud-Investigating-And-Defending-Office-365.pdf

version: 1

---

Suspicious AWS Login Activities

Monitor your AWS authentication events using your CloudTrail logs. Searches within this Analytic Story will help you stay aware of and investigate suspicious logins.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Authentication
• ATT&CK: T1535
• Last Updated: 2019-05-01

details

Detection Profile

• AWS Investigate User Activities By ARN

• Detect AWS Console Login by User from New City

• Detect AWS Console Login by User from New Country

• Detect AWS Console Login by User from New Region

• Previously seen users in CloudTrail

• Update previously seen users in CloudTrail

ATT&CK

ID	Technique	Tactic
T1535	Unused/Unsupported Cloud Regions	Defense Evasion

Kill Chain Phase

• Actions on Objectives

Reference

• https://docs.aws.amazon.com/IAM/latest/UserGuide/cloudtrail-integration.html

version: 1

---

Suspicious AWS S3 Activities

Use the searches in this Analytic Story to monitor your AWS S3 buckets for evidence of anomalous activity and suspicious behaviors, such as detecting open S3 buckets and buckets being accessed from a new IP. The contextual and investigative searches will give you more information, when required.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1530
• Last Updated: 2018-07-24

details

Detection Profile

• AWS Investigate User Activities By ARN

• AWS S3 Bucket details via bucketName

• Baseline of S3 Bucket deletion activity by ARN

• Detect New Open S3 Buckets over AWS CLI

• Detect New Open S3 buckets

• Detect S3 access from a new IP

• Detect Spike in S3 Bucket deletion

• Get All AWS Activity From IP Address

• Get Notable History

• Investigate AWS activities via region name

• Previously seen S3 bucket access by remote IP

ATT&CK

ID	Technique	Tactic
T1530	Data from Cloud Storage Object	Collection

Kill Chain Phase

• Actions on Objectives

Reference

• https://d0.awsstatic.com/whitepapers/aws-security-best-practices.pdf

• https://www.tripwire.com/state-of-security/security-data-protection/cloud/public-aws-s3-buckets-writable/

version: 2

---

Suspicious AWS Traffic

Leverage these searches to monitor your AWS network traffic for evidence of anomalous activity and suspicious behaviors, such as a spike in blocked outbound traffic in your virtual private cloud (VPC).

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK:
• Last Updated: 2018-05-07

details

Detection Profile

• AWS Investigate User Activities By ARN

• AWS Network ACL Details from ID

• AWS Network Interface details via resourceId

• Baseline of blocked outbound traffic from AWS

• Detect Spike in blocked Outbound Traffic from your AWS

• Get All AWS Activity From IP Address

• Get DNS Server History for a host

• Get DNS traffic ratio

• Get Notable History

• Get Process Info

• Get Process Information For Port Activity

• Get Process Responsible For The DNS Traffic

ATT&CK

ID	Technique	Tactic

Kill Chain Phase

• Actions on Objectives

• Command and Control

Reference

• https://rhinosecuritylabs.com/aws/hiding-cloudcobalt-strike-beacon-c2-using-amazon-apis/

version: 1

---

Suspicious Cloud Authentication Activities

Monitor your cloud authentication events. Searches within this Analytic Story leverage the recent cloud updates to the Authentication data model to help you stay aware of and investigate suspicious login activity.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Authentication
• ATT&CK: T1535
• Last Updated: 2020-06-04

details

Detection Profile

• AWS Cross Account Activity From Previously Unseen Account

• Detect AWS Console Login by New User

• Detect AWS Console Login by User from New City

• Detect AWS Console Login by User from New Country

• Detect AWS Console Login by User from New Region

• Get Notable History

• Investigate AWS User Activities by user field

• Previously Seen AWS Cross Account Activity - Initial

• Previously Seen AWS Cross Account Activity - Update

• Previously Seen Users In CloudTrail - Update

• Previously Seen Users in CloudTrail - Initial

ATT&CK

ID	Technique	Tactic
T1535	Unused/Unsupported Cloud Regions	Defense Evasion

Kill Chain Phase

• Actions on Objectives

Reference

• https://aws.amazon.com/blogs/security/aws-cloudtrail-now-tracks-cross-account-activity-to-its-origin/

• https://docs.aws.amazon.com/IAM/latest/UserGuide/cloudtrail-integration.html

version: 1

---

Suspicious Cloud Instance Activities

Monitor your cloud infrastructure provisioning activities for behaviors originating from unfamiliar or unusual locations. These behaviors may indicate that malicious activities are occurring somewhere within your cloud environment.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Change
• ATT&CK: T1078.004, T1537
• Last Updated: 2020-08-25

details

Detection Profile

• AWS Investigate User Activities By ARN

• Abnormally High Number Of Cloud Instances Destroyed

• Abnormally High Number Of Cloud Instances Launched

• Baseline Of Cloud Instances Destroyed

• Baseline Of Cloud Instances Launched

• Cloud Instance Modified By Previously Unseen User

• Detect shared ec2 snapshot

• Get All AWS Activity From IP Address

• Previously Seen Cloud Instance Modifications By User - Initial

• Previously Seen Cloud Instance Modifications By User - Update

ATT&CK

ID	Technique	Tactic
T1078.004	Cloud Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1537	Transfer Data to Cloud Account	Exfiltration

Kill Chain Phase

• Actions on Objectives

Reference

• https://d0.awsstatic.com/whitepapers/aws-security-best-practices.pdf

version: 1

---

Suspicious Cloud Provisioning Activities

Monitor your cloud infrastructure provisioning activities for behaviors originating from unfamiliar or unusual locations. These behaviors may indicate that malicious activities are occurring somewhere within your cloud environment.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Change
• ATT&CK: T1078
• Last Updated: 2018-08-20

details

Detection Profile

• Cloud Provisioning Activity From Previously Unseen City

• Cloud Provisioning Activity From Previously Unseen Country

• Cloud Provisioning Activity From Previously Unseen IP Address

• Cloud Provisioning Activity From Previously Unseen Region

• Get Notable History

• Previously Seen Cloud Provisioning Activity Sources - Initial

• Previously Seen Cloud Provisioning Activity Sources - Update

ATT&CK

ID	Technique	Tactic
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access

Kill Chain Phase

Reference

• https://d0.awsstatic.com/whitepapers/aws-security-best-practices.pdf

version: 1

---

Suspicious Cloud User Activities

Detect and investigate suspicious activities by users and roles in your cloud environments.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Change
• ATT&CK: T1078, T1078.004, T1580
• Last Updated: 2020-09-04

details

Detection Profile

• AWS IAM AccessDenied Discovery Events

• AWS Investigate User Activities By ARN

• Abnormally High Number Of Cloud Infrastructure API Calls

• Abnormally High Number Of Cloud Security Group API Calls

• Baseline Of Cloud Infrastructure API Calls Per User

• Baseline Of Cloud Security Group API Calls Per User

• Cloud API Calls From Previously Unseen User Roles

• Previously Seen Cloud API Calls Per User Role - Initial

• Previously Seen Cloud API Calls Per User Role - Update

ATT&CK

ID	Technique	Tactic
T1580	Cloud Infrastructure Discovery	Discovery
T1078.004	Cloud Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access
T1078	Valid Accounts	Defense Evasion, Persistence, Privilege Escalation, Initial Access

Kill Chain Phase

• Actions on Objectives

• Reconnaissance

Reference

• https://d0.awsstatic.com/whitepapers/aws-security-best-practices.pdf

• https://redlock.io/blog/cryptojacking-tesla

version: 1

---

Suspicious GCP Storage Activities

Use the searches in this Analytic Story to monitor your GCP Storage buckets for evidence of anomalous activity and suspicious behaviors, such as detecting open storage buckets and buckets being accessed from a new IP. The contextual and investigative searches will give you more information, when required.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1530
• Last Updated: 2020-08-05

details

Detection Profile

• Detect GCP Storage access from a new IP

• Detect New Open GCP Storage Buckets

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1530	Data from Cloud Storage Object	Collection

Kill Chain Phase

• Actions on Objectives

Reference

• https://cloud.google.com/blog/product/gcp/4-steps-for-hardening-your-cloud-storage-buckets-taking-charge-of-your-security

• https://rhinosecuritylabs.com/gcp/google-cloud-platform-gcp-bucket-enumeration/

version: 1

---

Lateral Movement

details

PrintNightmare CVE-2021-34527

The following analytic story identifies behaviors related PrintNightmare, or CVE-2021-34527 previously known as (CVE-2021-1675), to gain privilege escalation on the vulnerable machine.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1068, T1218.011, T1547.012
• Last Updated: 2021-07-01

details

Detection Profile

• Print Spooler Adding A Printer Driver

• Print Spooler Failed to Load a Plug-in

• Rundll32 with no Command Line Arguments with Network

• Spoolsv Spawning Rundll32

• Spoolsv Suspicious Loaded Modules

• Spoolsv Suspicious Process Access

• Spoolsv Writing a DLL

• Spoolsv Writing a DLL - Sysmon

• Suspicious Rundll32 no Command Line Arguments

ATT&CK

ID	Technique	Tactic
T1547.012	Print Processors	Persistence, Privilege Escalation
T1218.011	Rundll32	Defense Evasion
T1068	Exploitation for Privilege Escalation	Privilege Escalation

Kill Chain Phase

• Actions on Objectives

• Exploitation

Reference

• https://github.com/cube0x0/CVE-2021-1675/

• https://blog.truesec.com/2021/06/30/fix-for-printnightmare-cve-2021-1675-exploit-to-keep-your-print-servers-running-while-a-patch-is-not-available/

• https://blog.truesec.com/2021/06/30/exploitable-critical-rce-vulnerability-allows-regular-users-to-fully-compromise-active-directory-printnightmare-cve-2021-1675/

• https://www.reddit.com/r/msp/comments/ob6y02/critical_vulnerability_printnightmare_exposes

version: 1

---

Malware

details

Clop Ransomware

Leverage searches that allow you to detect and investigate unusual activities that might relate to the Clop ransomware, including looking for file writes associated with Clope, encrypting network shares, deleting and resizing shadow volume storage, registry key modification, deleting of security logs, and more.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1003.002, T1070.001, T1204, T1485, T1486, T1489, T1490, T1543, T1569.002
• Last Updated: 2021-03-17

details

Detection Profile

• Clop Common Exec Parameter

• Clop Ransomware Known Service Name

• Common Ransomware Extensions

• Common Ransomware Notes

• Create Service In Suspicious File Path

• Deleting Shadow Copies

• High File Deletion Frequency

• High Process Termination Frequency

• Process Deleting Its Process File Path

• Ransomware Notes bulk creation

• Resize ShadowStorage volume

• Resize Shadowstorage Volume

• Suspicious Event Log Service Behavior

• Suspicious wevtutil Usage

• WevtUtil Usage To Clear Logs

• Windows Event Log Cleared

ATT&CK

ID	Technique	Tactic
T1204	User Execution	Execution
T1543	Create or Modify System Process	Persistence, Privilege Escalation
T1485	Data Destruction	Impact
T1569.002	Service Execution	Execution
T1490	Inhibit System Recovery	Impact
T1486	Data Encrypted for Impact	Impact
T1003.002	Security Account Manager	Credential Access
T1489	Service Stop	Impact
T1070.001	Clear Windows Event Logs	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Exploitation

• Obfuscation

• Privilege Escalation

Reference

• https://www.hhs.gov/sites/default/files/analyst-note-cl0p-tlp-white.pdf

• https://securityaffairs.co/wordpress/115250/data-breach/qualys-clop-ransomware.html

• https://www.darkreading.com/attacks-breaches/qualys-is-the-latest-victim-of-accellion-data-breach/d/d-id/1340323

version: 1

---

ColdRoot MacOS RAT

Leverage searches that allow you to detect and investigate unusual activities that relate to the ColdRoot Remote Access Trojan that affects MacOS. An example of some of these activities are changing sensative binaries in the MacOS sub-system, detecting process names and executables associated with the RAT, detecting when a keyboard tab is installed on a MacOS machine and more.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Network_Traffic
• ATT&CK:
• Last Updated: 2019-01-09

details

Detection Profile

• Get Notable History

• Investigate Network Traffic From src ip

• Processes Tapping Keyboard Events

ATT&CK

ID	Technique	Tactic

Kill Chain Phase

• Command and Control

Reference

• https://www.intego.com/mac-security-blog/osxcoldroot-and-the-rat-invasion/

• https://objective-see.com/blog/blog_0x2A.html

• https://www.bleepingcomputer.com/news/security/coldroot-rat-still-undetectable-despite-being-uploaded-on-github-two-years-ago/

version: 1

---

DHS Report TA18-074A

Monitor for suspicious activities associated with DHS Technical Alert US-CERT TA18-074A. Some of the activities that adversaries used in these compromises included spearfishing attacks, malware, watering-hole domains, many and more.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK: T1021.002, T1053.005, T1059.001, T1071.002, T1112, T1136.001, T1204.002, T1543.003, T1547.001, T1562.004, T1569.002
• Last Updated: 2020-01-22

details

Detection Profile

• Baseline of SMB Traffic - MLTK

• Create local admin accounts using net exe

• Detect New Local Admin account

• Detect Outbound SMB Traffic

• Detect PsExec With accepteula Flag

• Detect Renamed PSExec

• Get Notable History

• Get Parent Process Info

• Get Process File Activity

• Get Process Info

• Get Process Information For Port Activity

• Malicious PowerShell Process - Execution Policy Bypass

• Previously seen command line arguments

• Processes launching netsh

• Registry Keys Used For Persistence

• SMB Traffic Spike

• SMB Traffic Spike - MLTK

• Sc exe Manipulating Windows Services

• Scheduled Task Deleted Or Created via CMD

• Single Letter Process On Endpoint

• Suspicious Reg exe Process

ATT&CK

ID	Technique	Tactic
T1136.001	Local Account	Persistence
T1071.002	File Transfer Protocols	Command And Control
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1569.002	Service Execution	Execution
T1059.001	PowerShell	Execution
T1562.004	Disable or Modify System Firewall	Defense Evasion
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation
T1543.003	Windows Service	Persistence, Privilege Escalation
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation
T1204.002	Malicious File	Execution
T1112	Modify Registry	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Execution

• Exploitation

• Installation

• Lateral Movement

Reference

• https://www.us-cert.gov/ncas/alerts/TA18-074A

version: 2

---

DarkSide Ransomware

Leverage searches that allow you to detect and investigate unusual activities that might relate to the DarkSide Ransomware

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1003.001, T1003.002, T1020, T1021.002, T1055, T1105, T1197, T1218.003, T1486, T1490, T1548.002, T1569.002
• Last Updated: 2021-05-12

details

Detection Profile

• Attempted Credential Dump From Registry via Reg exe

• BITSAdmin Download File

• CMLUA Or CMSTPLUA UAC Bypass

• CertUtil Download With URLCache and Split Arguments

• CertUtil Download With VerifyCtl and Split Arguments

• Cobalt Strike Named Pipes

• Delete ShadowCopy With PowerShell

• Detect Mimikatz Using Loaded Images

• Detect PsExec With accepteula Flag

• Detect RClone Command-Line Usage

• Detect Renamed PSExec

• Detect Renamed RClone

• Extract SAM from Registry

• Ransomware Notes bulk creation

• SLUI RunAs Elevated

• SLUI Spawning a Process

ATT&CK

ID	Technique	Tactic
T1003.002	Security Account Manager	Credential Access
T1197	BITS Jobs	Defense Evasion, Persistence
T1105	Ingress Tool Transfer	Command And Control
T1218.003	CMSTP	Defense Evasion
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1490	Inhibit System Recovery	Impact
T1003.001	LSASS Memory	Credential Access
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1020	Automated Exfiltration	Exfiltration
T1569.002	Service Execution	Execution
T1486	Data Encrypted for Impact	Impact
T1548.002	Bypass User Account Control	Privilege Escalation, Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Execution

• Exfiltration

• Exploitation

• Lateral Movement

• Obfuscation

Reference

• https://www.splunk.com/en_us/blog/security/the-darkside-of-the-ransomware-pipeline.htmlbig-game-hunting-with-ryuk-another-lucrative-targeted-ransomware/

• https://www.fireeye.com/blog/threat-research/2021/05/shining-a-light-on-darkside-ransomware-operations.html

version: 1

---

Dynamic DNS

Detect and investigate hosts in your environment that may be communicating with dynamic domain providers. Attackers may leverage these services to help them avoid firewall blocks and deny lists.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Resolution, Network_Traffic
• ATT&CK: T1048, T1189
• Last Updated: 2018-09-06

details

Detection Profile

• DNS Exfiltration Using Nslookup App

• Detect hosts connecting to dynamic domain providers

• Excessive Usage of NSLOOKUP App

• Get DNS Server History for a host

• Get DNS traffic ratio

• Get Notable History

• Get Process Responsible For The DNS Traffic

ATT&CK

ID	Technique	Tactic
T1048	Exfiltration Over Alternative Protocol	Exfiltration
T1071.004	DNS	Command And Control
T1048.003	Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol	Exfiltration
T1095	Non-Application Layer Protocol	Command And Control
T1041	Exfiltration Over C2 Channel	Exfiltration
T1189	Drive-by Compromise	Initial Access
T1537	Transfer Data to Cloud Account	Exfiltration
T1114.001	Local Email Collection	Collection
T1114	Email Collection	Collection
T1114.003	Email Forwarding Rule	Collection
T1071.001	Web Protocols	Command And Control

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Exploitation

Reference

• https://www.fireeye.com/blog/threat-research/2017/09/apt33-insights-into-iranian-cyber-espionage.html

• https://umbrella.cisco.com/blog/2013/04/15/on-the-trail-of-malicious-dynamic-dns-domains/

• http://www.noip.com/blog/2014/07/11/dynamic-dns-can-use-2/

• https://www.splunk.com/blog/2015/08/04/detecting-dynamic-dns-domains-in-splunk.html

version: 2

---

Emotet Malware DHS Report TA18-201A

Detect rarely used executables, specific registry paths that may confer malware survivability and persistence, instances where cmd.exe is used to launch script interpreters, and other indicators that the Emotet financial malware has compromised your environment.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Email, Endpoint, Network_Traffic
• ATT&CK: T1021.002, T1059.003, T1072, T1547.001, T1566.001
• Last Updated: 2020-01-27

details

Detection Profile

• Baseline of SMB Traffic - MLTK

• Detect Rare Executables

• Detect Use of cmd exe to Launch Script Interpreters

• Detection of tools built by NirSoft

• Email Attachments With Lots Of Spaces

• Get History Of Email Sources

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Get Process Information For Port Activity

• Registry Keys Used For Persistence

• SMB Traffic Spike

• SMB Traffic Spike - MLTK

• Suspicious Email Attachment Extensions

ATT&CK

ID	Technique	Tactic
T1059.003	Windows Command Shell	Execution
T1072	Software Deployment Tools	Execution, Lateral Movement
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1566.001	Spearphishing Attachment	Initial Access

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Delivery

• Exploitation

• Installation

Reference

• https://www.us-cert.gov/ncas/alerts/TA18-201A

• https://www.first.org/resources/papers/conf2017/Advanced-Incident-Detection-and-Threat-Hunting-using-Sysmon-and-Splunk.pdf

• https://www.vkremez.com/2017/05/emotet-banking-trojan-malware-analysis.html

version: 1

---

Hidden Cobra Malware

Monitor for and investigate activities, including the creation or deletion of hidden shares and file writes, that may be evidence of infiltration by North Korean government-sponsored cybercriminals. Details of this activity were reported in DHS Report TA-18-149A.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Authentication, Email, Endpoint, Network_Resolution, Network_Traffic
• ATT&CK: T1021.001, T1021.002, T1048.003, T1070.005, T1071.002, T1071.004
• Last Updated: 2020-01-22

details

Detection Profile

• Baseline of DNS Query Length - MLTK

• Baseline of SMB Traffic - MLTK

• Create or delete windows shares using net exe

• DNS Query Length Outliers - MLTK

• DNS Query Length With High Standard Deviation

• Detect Outbound SMB Traffic

• Get DNS Server History for a host

• Get DNS traffic ratio

• Get History Of Email Sources

• Get Notable History

• Get Outbound Emails to Hidden Cobra Threat Actors

• Get Parent Process Info

• Get Process Info

• Get Process Information For Port Activity

• Get Process Responsible For The DNS Traffic

• Investigate Successful Remote Desktop Authentications

• Previously seen command line arguments

• Remote Desktop Network Traffic

• Remote Desktop Process Running On System

• SMB Traffic Spike

• SMB Traffic Spike - MLTK

ATT&CK

ID	Technique	Tactic
T1070.005	Network Share Connection Removal	Defense Evasion
T1071.004	DNS	Command And Control
T1048.003	Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol	Exfiltration
T1071.002	File Transfer Protocols	Command And Control
T1021.001	Remote Desktop Protocol	Lateral Movement
T1021.002	SMB/Windows Admin Shares	Lateral Movement

Kill Chain Phase

• Actions on Objectives

• Command and Control

Reference

• https://www.us-cert.gov/HIDDEN-COBRA-North-Korean-Malicious-Cyber-Activity

• https://www.operationblockbuster.com/wp-content/uploads/2016/02/Operation-Blockbuster-Destructive-Malware-Report.pdf

version: 2

---

IcedID

Leverage searches that allow you to detect and investigate unusual activities that might relate to the IcedID banking trojan, including looking for file writes associated with its payload, process injection, shellcode execution and data collection.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1005, T1053, T1053.005, T1055, T1059, T1087.002, T1112, T1204.002, T1218.005, T1218.010, T1218.011, T1482, T1547.001, T1548.002, T1560.001, T1566.001
• Last Updated: 2021-07-29

details

Detection Profile

• Account Discovery With Net App

• CHCP Command Execution

• Create Remote Thread In Shell Application

• Drop IcedID License dat

• Eventvwr UAC Bypass

• FodHelper UAC Bypass

• IcedID Exfiltrated Archived File Creation

• Mshta spawning Rundll32 OR Regsvr32 Process

• NLTest Domain Trust Discovery

• Office Application Spawn Regsvr32 process

• Office Application Spawn rundll32 process

• Office Document Executing Macro Code

• Office Product Spawning MSHTA

• Previously seen command line arguments

• Registry Keys Used For Persistence

• Rundll32 Create Remote Thread To A Process

• Rundll32 CreateRemoteThread In Browser

• Rundll32 DNSQuery

• Rundll32 Process Creating Exe Dll Files

• Schedule Task with Rundll32 Command Trigger

• Sqlite Module In Temp Folder

• Suspicious IcedID Regsvr32 Cmdline

• Suspicious IcedID Rundll32 Cmdline

• Suspicious Rundll32 PluginInit

• WinEvent Scheduled Task Created Within Public Path

ATT&CK

ID	Technique	Tactic
T1087.002	Domain Account	Discovery
T1562.001	Disable or Modify Tools	Defense Evasion
T1059	Command and Scripting Interpreter	Execution
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1204.002	Malicious File	Execution
T1548.002	Bypass User Account Control	Privilege Escalation, Defense Evasion
T1112	Modify Registry	Defense Evasion
T1560.001	Archive via Utility	Collection
T1218.005	Mshta	Defense Evasion
T1482	Domain Trust Discovery	Discovery
T1566.001	Spearphishing Attachment	Initial Access
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation
T1218.011	Rundll32	Defense Evasion
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1005	Data from Local System	Collection
T1218.010	Regsvr32	Defense Evasion
T1590.005	IP Addresses	Reconnaissance
T1027	Obfuscated Files or Information	Defense Evasion
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation
T1021.002	SMB/Windows Admin Shares	Lateral Movement

Kill Chain Phase

• Actions on Objectives

• Exploitation

• Privilege Escalation

• Reconnaissance

Reference

• https://threatpost.com/icedid-banking-trojan-surges-emotet/165314/

• https://app.any.run/tasks/48414a33-3d66-4a46-afe5-c2003bb55ccf/

version: 1

---

Orangeworm Attack Group

Detect activities and various techniques associated with the Orangeworm Attack Group, a group that frequently targets the healthcare industry.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Email, Endpoint
• ATT&CK: T1543.003, T1569.002
• Last Updated: 2020-01-22

details

Detection Profile

• First Time Seen Running Windows Service

• Get History Of Email Sources

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Previously Seen Running Windows Services - Initial

• Previously Seen Running Windows Services - Update

• Previously seen command line arguments

• Sc exe Manipulating Windows Services

ATT&CK

ID	Technique	Tactic
T1569.002	Service Execution	Execution
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1106	Native API	Execution
T1569	System Services	Execution
T1574.011	Services Registry Permissions Weakness	Persistence, Privilege Escalation, Defense Evasion
T1543.003	Windows Service	Persistence, Privilege Escalation

Kill Chain Phase

• Actions on Objectives

• Installation

Reference

• https://www.symantec.com/blogs/threat-intelligence/orangeworm-targets-healthcare-us-europe-asia

• https://www.infosecurity-magazine.com/news/healthcare-targeted-by-hacker/

version: 2

---

Ransomware

Leverage searches that allow you to detect and investigate unusual activities that might relate to ransomware--spikes in SMB traffic, suspicious wevtutil usage, the presence of common ransomware extensions, and system processes run from unexpected locations, and many others.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Email, Endpoint, Network_Traffic
• ATT&CK: T1020, T1021.002, T1027.005, T1036.003, T1047, T1048, T1053.005, T1059.005, T1069.001, T1069.002, T1070, T1070.001, T1070.004, T1071.001, T1087.001, T1087.002, T1112, T1204, T1218.003, T1218.007, T1218.011, T1222, T1482, T1485, T1489, T1490, T1491, T1531, T1546.015, T1547.001, T1548, T1560.001, T1562.001, T1562.007, T1569.002, T1574.002, T1592
• Last Updated: 2020-02-04

details

Detection Profile

• 7zip CommandLine To SMB Share Path

• Allow File And Printing Sharing In Firewall

• Allow Network Discovery In Firewall

• Allow Operation with Consent Admin

• Attempt To Disable Services

• Attempt To delete Services

• BCDEdit Failure Recovery Modification

• Baseline of Command Line Length - MLTK

• Baseline of SMB Traffic - MLTK

• CMLUA Or CMSTPLUA UAC Bypass

• Clear Unallocated Sector Using Cipher App

• Common Ransomware Extensions

• Common Ransomware Notes

• Conti Common Exec parameter

• Delete A Net User

• Delete ShadowCopy With PowerShell

• Deleting Shadow Copies

• Detect RClone Command-Line Usage

• Detect Renamed RClone

• Detect SharpHound Command-Line Arguments

• Detect SharpHound File Modifications

• Detect SharpHound Usage

• Disable AMSI Through Registry

• Disable ETW Through Registry

• Disable Logs Using WevtUtil

• Disable Net User Account

• Disable Windows Behavior Monitoring

• Excessive Service Stop Attempt

• Excessive Usage Of Net App

• Excessive Usage Of SC Service Utility

• Execute Javascript With Jscript COM CLSID

• Fsutil Zeroing File

• Get Backup Logs For Endpoint

• Get History Of Email Sources

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Get Process Information For Port Activity

• Get Sysmon WMI Activity for Host

• ICACLS Grant Command

• Known Services Killed by Ransomware

• Modification Of Wallpaper

• Msmpeng Application DLL Side Loading

• Permission Modification using Takeown App

• Powershell Disable Security Monitoring

• Powershell Enable SMB1Protocol Feature

• Powershell Execute COM Object

• Prevent Automatic Repair Mode using Bcdedit

• Prohibited Network Traffic Allowed

• Recon AVProduct Through Pwh or WMI

• Recursive Delete of Directory In Batch CMD

• Registry Keys Used For Persistence

• Remote Process Instantiation via WMI

• Resize Shadowstorage Volume

• Revil Common Exec Parameter

• Revil Registry Entry

• Rundll32 LockWorkStation

• SMB Traffic Spike

• SMB Traffic Spike - MLTK

• Schtasks used for forcing a reboot

• Spike in File Writes

• Start Up During Safe Mode Boot

• Suspicious Event Log Service Behavior

• Suspicious Scheduled Task from Public Directory

• Suspicious wevtutil Usage

• System Processes Run From Unexpected Locations

• TOR Traffic

• UAC Bypass With Colorui COM Object

• USN Journal Deletion

• Uninstall App Using MsiExec

• Unusually Long Command Line

• Unusually Long Command Line - MLTK

• WBAdmin Delete System Backups

• Wbemprox COM Object Execution

• WevtUtil Usage To Clear Logs

• Wevtutil Usage To Disable Logs

• WinEvent Scheduled Task Created Within Public Path

• WinEvent Scheduled Task Created to Spawn Shell

• Windows Event Log Cleared

ATT&CK

ID	Technique	Tactic
T1560.001	Archive via Utility	Collection
T1562.007	Disable or Modify Cloud Firewall	Defense Evasion
T1548	Abuse Elevation Control Mechanism	Privilege Escalation, Defense Evasion
T1489	Service Stop	Impact
T1490	Inhibit System Recovery	Impact
T1218.003	CMSTP	Defense Evasion
T1070.004	File Deletion	Defense Evasion
T1485	Data Destruction	Impact
T1204	User Execution	Execution
T1020	Automated Exfiltration	Exfiltration
T1087.002	Domain Account	Discovery
T1087.001	Local Account	Discovery
T1482	Domain Trust Discovery	Discovery
T1069.002	Domain Groups	Discovery
T1069.001	Local Groups	Discovery
T1562.001	Disable or Modify Tools	Defense Evasion
T1070.001	Clear Windows Event Logs	Defense Evasion
T1531	Account Access Removal	Impact
T1569.002	Service Execution	Execution
T1059.005	Visual Basic	Execution
T1070	Indicator Removal on Host	Defense Evasion
T1222	File and Directory Permissions Modification	Defense Evasion
T1491	Defacement	Impact
T1574.002	DLL Side-Loading	Persistence, Privilege Escalation, Defense Evasion
T1027.005	Indicator Removal from Tools	Defense Evasion
T1546.015	Component Object Model Hijacking	Privilege Escalation, Persistence
T1048	Exfiltration Over Alternative Protocol	Exfiltration
T1592	Gather Victim Host Information	Reconnaissance
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation
T1047	Windows Management Instrumentation	Execution
T1112	Modify Registry	Defense Evasion
T1218.011	Rundll32	Defense Evasion
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation
T1036.003	Rename System Utilities	Defense Evasion
T1071.001	Web Protocols	Command And Control
T1218.007	Msiexec	Defense Evasion

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Delivery

• Exfiltration

• Exploitation

• Privilege Escalation

• Reconnaissance

Reference

• https://www.carbonblack.com/2017/06/28/carbon-black-threat-research-technical-analysis-petya-notpetya-ransomware/

• https://www.splunk.com/blog/2017/06/27/closing-the-detection-to-mitigation-gap-or-to-petya-or-notpetya-whocares-.html

version: 1

---

Ransomware Cloud

Leverage searches that allow you to detect and investigate unusual activities that might relate to ransomware. These searches include cloud related objects that may be targeted by malicious actors via cloud providers own encryption features.

• Product: Splunk Security Analytics for AWS, Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel:
• ATT&CK: T1486
• Last Updated: 2020-10-27

details

Detection Profile

• AWS Detect Users creating keys with encrypt policy without MFA

• AWS Detect Users with KMS keys performing encryption S3

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1486	Data Encrypted for Impact	Impact

Kill Chain Phase

Reference

• https://rhinosecuritylabs.com/aws/s3-ransomware-part-1-attack-vector/

• https://github.com/d1vious/git-wild-hunt

• https://www.youtube.com/watch?v=PgzNib37g0M

version: 1

---

Revil Ransomware

Leverage searches that allow you to detect and investigate unusual activities that might relate to the Revil ransomware, including looking for file writes associated with Revil, encrypting network shares, deleting shadow volume storage, registry key modification, deleting of security logs, and more.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1112, T1204, T1218.003, T1490, T1491, T1562.001, T1562.007, T1574.002
• Last Updated: 2021-06-04

details

Detection Profile

• Allow Network Discovery In Firewall

• Delete ShadowCopy With PowerShell

• Disable Windows Behavior Monitoring

• Modification Of Wallpaper

• Msmpeng Application DLL Side Loading

• Powershell Disable Security Monitoring

• Revil Common Exec Parameter

• Revil Registry Entry

• Wbemprox COM Object Execution

ATT&CK

ID	Technique	Tactic
T1562.007	Disable or Modify Cloud Firewall	Defense Evasion
T1490	Inhibit System Recovery	Impact
T1562.001	Disable or Modify Tools	Defense Evasion
T1491	Defacement	Impact
T1574.002	DLL Side-Loading	Persistence, Privilege Escalation, Defense Evasion
T1204	User Execution	Execution
T1112	Modify Registry	Defense Evasion
T1218.003	CMSTP	Defense Evasion

Kill Chain Phase

• Exploitation

Reference

• https://krebsonsecurity.com/2021/05/a-closer-look-at-the-darkside-ransomware-gang/

• https://www.mcafee.com/blogs/other-blogs/mcafee-labs/mcafee-atr-analyzes-sodinokibi-aka-revil-ransomware-as-a-service-what-the-code-tells-us/

version: 1

---

Ryuk Ransomware

Leverage searches that allow you to detect and investigate unusual activities that might relate to the Ryuk ransomware, including looking for file writes associated with Ryuk, Stopping Security Access Manager, DisableAntiSpyware registry key modification, suspicious psexec use, and more.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Network_Traffic
• ATT&CK: T1021.001, T1053.005, T1059.003, T1482, T1485, T1486, T1489, T1490, T1562.001
• Last Updated: 2020-11-06

details

Detection Profile

• BCDEdit Failure Recovery Modification

• Common Ransomware Extensions

• Common Ransomware Notes

• Get Notable History

• NLTest Domain Trust Discovery

• Remote Desktop Network Bruteforce

• Remote Desktop Network Traffic

• Ryuk Test Files Detected

• Ryuk Wake on LAN Command

• Spike in File Writes

• Suspicious Scheduled Task from Public Directory

• WBAdmin Delete System Backups

• WinEvent Scheduled Task Created Within Public Path

• WinEvent Scheduled Task Created to Spawn Shell

• Windows DisableAntiSpyware Registry

• Windows Security Account Manager Stopped

ATT&CK

ID	Technique	Tactic
T1490	Inhibit System Recovery	Impact
T1485	Data Destruction	Impact
T1482	Domain Trust Discovery	Discovery
T1021.001	Remote Desktop Protocol	Lateral Movement
T1486	Data Encrypted for Impact	Impact
T1059.003	Windows Command Shell	Execution
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation
T1562.001	Disable or Modify Tools	Defense Evasion
T1489	Service Stop	Impact

Kill Chain Phase

• Actions on Objectives

• Delivery

• Exploitation

• Lateral Movement

• Privilege Escalation

• Reconnaissance

Reference

• https://www.splunk.com/en_us/blog/security/detecting-ryuk-using-splunk-attack-range.html

• https://www.crowdstrike.com/blog/big-game-hunting-with-ryuk-another-lucrative-targeted-ransomware/

• https://us-cert.cisa.gov/ncas/alerts/aa20-302a

version: 1

---

SamSam Ransomware

Leverage searches that allow you to detect and investigate unusual activities that might relate to the SamSam ransomware, including looking for file writes associated with SamSam, RDP brute force attacks, the presence of files with SamSam ransomware extensions, suspicious psexec use, and more.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Authentication, Email, Endpoint, Network_Traffic, Web
• ATT&CK: T1003, T1021.001, T1021.002, T1036.005, T1082, T1204.002, T1485, T1486, T1490, T1569.002, T1595
• Last Updated: 2018-12-13

details

Detection Profile

• Attacker Tools On Endpoint

• Batch File Write to System32

• Common Ransomware Extensions

• Common Ransomware Notes

• Deleting Shadow Copies

• Detect PsExec With accepteula Flag

• Detect Renamed PSExec

• Detect attackers scanning for vulnerable JBoss servers

• Detect malicious requests to exploit JBoss servers

• File with Samsam Extension

• Get Backup Logs For Endpoint

• Get History Of Email Sources

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Get Process Information For Port Activity

• Investigate Successful Remote Desktop Authentications

• Remote Desktop Network Bruteforce

• Remote Desktop Network Traffic

• Samsam Test File Write

• Spike in File Writes

ATT&CK

ID	Technique	Tactic
T1036.005	Match Legitimate Name or Location	Defense Evasion
T1595	Active Scanning	Reconnaissance
T1003	OS Credential Dumping	Credential Access
T1489	Service Stop	Impact
T1204.002	Malicious File	Execution
T1485	Data Destruction	Impact
T1531	Account Access Removal	Impact
T1490	Inhibit System Recovery	Impact
T1222	File and Directory Permissions Modification	Defense Evasion
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1569.002	Service Execution	Execution
T1082	System Information Discovery	Discovery
T1016	System Network Configuration Discovery	Discovery
T1562.001	Disable or Modify Tools	Defense Evasion
T1105	Ingress Tool Transfer	Command And Control
T1087	Account Discovery	Discovery
T1036	Masquerading	Defense Evasion
T1059	Command and Scripting Interpreter	Execution
T1117	Regsvr32
T1202	Indirect Command Execution	Defense Evasion
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1203	Exploitation for Client Execution	Execution
T1072	Software Deployment Tools	Execution, Lateral Movement
T1021.001	Remote Desktop Protocol	Lateral Movement
T1218.011	Rundll32	Defense Evasion
T1486	Data Encrypted for Impact	Impact
T1543.003	Windows Service	Persistence, Privilege Escalation
T1543	Create or Modify System Process	Persistence, Privilege Escalation
T1036.003	Rename System Utilities	Defense Evasion
T1190	Exploit Public-Facing Application	Initial Access

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Delivery

• Execution

• Exploitation

• Installation

• Lateral Movement

• Reconnaissance

Reference

• https://www.crowdstrike.com/blog/an-in-depth-analysis-of-samsam-ransomware-and-boss-spider/

• https://nakedsecurity.sophos.com/2018/07/31/samsam-the-almost-6-million-ransomware/

• https://thehackernews.com/2018/07/samsam-ransomware-attacks.html

version: 1

---

Trickbot

Leverage searches that allow you to detect and investigate unusual activities that might relate to the trickbot banking trojan, including looking for file writes associated with its payload, process injection, shellcode execution and data collection even in LDAP environment.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1021.002, T1027, T1053, T1055, T1059, T1087.002, T1218.005, T1218.011, T1562.001, T1566.001, T1590.005
• Last Updated: 2021-04-20

details

Detection Profile

• Account Discovery With Net App

• Attempt To Stop Security Service

• Cobalt Strike Named Pipes

• Mshta spawning Rundll32 OR Regsvr32 Process

• Office Application Spawn rundll32 process

• Office Document Executing Macro Code

• Office Product Spawn CMD Process

• Powershell Remote Thread To Known Windows Process

• Schedule Task with Rundll32 Command Trigger

• Suspicious Rundll32 StartW

• Trickbot Named Pipe

• Wermgr Process Connecting To IP Check Web Services

• Wermgr Process Create Executable File

• Wermgr Process Spawned CMD Or Powershell Process

• Write Executable in SMB Share

ATT&CK

ID	Technique	Tactic
T1087.002	Domain Account	Discovery
T1562.001	Disable or Modify Tools	Defense Evasion
T1059	Command and Scripting Interpreter	Execution
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1204.002	Malicious File	Execution
T1548.002	Bypass User Account Control	Privilege Escalation, Defense Evasion
T1112	Modify Registry	Defense Evasion
T1560.001	Archive via Utility	Collection
T1218.005	Mshta	Defense Evasion
T1482	Domain Trust Discovery	Discovery
T1566.001	Spearphishing Attachment	Initial Access
T1547.001	Registry Run Keys / Startup Folder	Persistence, Privilege Escalation
T1218.011	Rundll32	Defense Evasion
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1005	Data from Local System	Collection
T1218.010	Regsvr32	Defense Evasion
T1590.005	IP Addresses	Reconnaissance
T1027	Obfuscated Files or Information	Defense Evasion
T1053.005	Scheduled Task	Execution, Persistence, Privilege Escalation
T1021.002	SMB/Windows Admin Shares	Lateral Movement

Kill Chain Phase

• Actions on Objectives

• Exploitation

• Installation

• Lateral Movement

• Reconnaissance

Reference

• https://en.wikipedia.org/wiki/Trickbot

• https://blog.checkpoint.com/2021/03/11/february-2021s-most-wanted-malware-trickbot-takes-over-following-emotet-shutdown/

version: 1

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Unusual Processes

Quickly identify systems running new or unusual processes in your environment that could be indicators of suspicious activity. Processes run from unusual locations, those with conspicuously long command lines, and rare executables are all examples of activities that may warrant deeper investigation.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1003, T1016, T1036.003, T1036.005, T1053, T1059, T1072, T1117, T1190, T1202, T1203, T1218.011, T1595
• Last Updated: 2020-02-04

details

Detection Profile

• Attacker Tools On Endpoint

• Baseline of Command Line Length - MLTK

• Credential Extraction indicative of FGDump and CacheDump with s option

• Credential Extraction indicative of FGDump and CacheDump with v option

• Credential Extraction indicative of use of Mimikatz modules

• Credential Extraction native Microsoft debuggers peek into the kernel

• Credential Extraction native Microsoft debuggers via z command line option

• Detect Rare Executables

• Detect processes used for System Network Configuration Discovery

• First time seen command line argument

• Get Notable History

• Get Parent Process Info

• Get Process Info

• More than usual number of LOLBAS applications in short time period

• Rare Parent-Child Process Relationship

• RunDLL Loading DLL By Ordinal

• System Processes Run From Unexpected Locations

• Unusually Long Command Line

• Unusually Long Command Line - MLTK

• WinRM Spawning a Process

ATT&CK

ID	Technique	Tactic
T1036.005	Match Legitimate Name or Location	Defense Evasion
T1595	Active Scanning	Reconnaissance
T1003	OS Credential Dumping	Credential Access
T1489	Service Stop	Impact
T1204.002	Malicious File	Execution
T1485	Data Destruction	Impact
T1531	Account Access Removal	Impact
T1490	Inhibit System Recovery	Impact
T1222	File and Directory Permissions Modification	Defense Evasion
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1569.002	Service Execution	Execution
T1082	System Information Discovery	Discovery
T1016	System Network Configuration Discovery	Discovery
T1562.001	Disable or Modify Tools	Defense Evasion
T1105	Ingress Tool Transfer	Command And Control
T1087	Account Discovery	Discovery
T1036	Masquerading	Defense Evasion
T1059	Command and Scripting Interpreter	Execution
T1117	Regsvr32
T1202	Indirect Command Execution	Defense Evasion
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1203	Exploitation for Client Execution	Execution
T1072	Software Deployment Tools	Execution, Lateral Movement
T1021.001	Remote Desktop Protocol	Lateral Movement
T1218.011	Rundll32	Defense Evasion
T1486	Data Encrypted for Impact	Impact
T1543.003	Windows Service	Persistence, Privilege Escalation
T1543	Create or Modify System Process	Persistence, Privilege Escalation
T1036.003	Rename System Utilities	Defense Evasion
T1190	Exploit Public-Facing Application	Initial Access

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Denial of Service

• Exploitation

• Installation

• Privilege Escalation

Reference

• https://www.fireeye.com/blog/threat-research/2017/08/monitoring-windows-console-activity-part-two.html

• https://www.splunk.com/pdfs/technical-briefs/advanced-threat-detection-and-response-tech-brief.pdf

• https://www.sans.org/reading-room/whitepapers/logging/detecting-security-incidents-windows-workstation-event-logs-34262

version: 2

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Windows File Extension and Association Abuse

Detect and investigate suspected abuse of file extensions and Windows file associations. Some of the malicious behaviors involved may include inserting spaces before file extensions or prepending the file extension with a different one, among other techniques.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1036.003
• Last Updated: 2018-01-26

details

Detection Profile

• Execution of File with Multiple Extensions

• Get Notable History

• Get Parent Process Info

• Get Process Info

ATT&CK

ID	Technique	Tactic
T1036.003	Rename System Utilities	Defense Evasion
T1127.001	MSBuild	Defense Evasion
T1218.011	Rundll32	Defense Evasion
T1127	Trusted Developer Utilities Proxy Execution	Defense Evasion
T1036	Masquerading	Defense Evasion

Kill Chain Phase

• Actions on Objectives

Reference

• https://blog.malwarebytes.com/cybercrime/2013/12/file-extensions-2/

• https://attack.mitre.org/wiki/Technique/T1042

version: 1

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Windows Service Abuse

Windows services are often used by attackers for persistence and the ability to load drivers or otherwise interact with the Windows kernel. This Analytic Story helps you monitor your environment for indications that Windows services are being modified or created in a suspicious manner.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1055, T1106, T1543.003, T1569, T1569.002, T1574.011
• Last Updated: 2017-11-02

details

Detection Profile

• First Time Seen Running Windows Service

• Get Notable History

• Get Parent Process Info

• Get Process Info

• Illegal Service and Process Control via Mimikatz modules

• Illegal Service and Process Control via PowerSploit modules

• Previously Seen Running Windows Services - Initial

• Previously Seen Running Windows Services - Update

• Reg exe Manipulating Windows Services Registry Keys

• Sc exe Manipulating Windows Services

ATT&CK

ID	Technique	Tactic
T1569.002	Service Execution	Execution
T1055	Process Injection	Defense Evasion, Privilege Escalation
T1106	Native API	Execution
T1569	System Services	Execution
T1574.011	Services Registry Permissions Weakness	Persistence, Privilege Escalation, Defense Evasion
T1543.003	Windows Service	Persistence, Privilege Escalation

Kill Chain Phase

• Actions on Objectives

• Installation

Reference

• https://attack.mitre.org/wiki/Technique/T1050

• https://attack.mitre.org/wiki/Technique/T1031

version: 3

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XMRig

Leverage searches that allow you to detect and investigate unusual activities that might relate to the xmrig monero, including looking for file writes associated with its payload, process command-line, defense evasion (killing services, deleting users, modifying files or folder permission, killing other malware or other coin miner) and hacking tools including Telegram as mean of command and control (C2) to download other files. Adversaries may leverage the resources of co-opted systems in order to solve resource intensive problems which may impact system and/or hosted service availability. One common purpose for Resource Hijacking is to validate transactions of cryptocurrency networks and earn virtual currency. Adversaries may consume enough system resources to negatively impact and/or cause affected machines to become unresponsive. (1) Servers and cloud-based (2) systems are common targets because of the high potential for available resources, but user endpoint systems may also be compromised and used for Resource Hijacking and cryptocurrency mining.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• ATT&CK: T1003, T1036, T1036.005, T1053, T1087, T1105, T1222, T1489, T1531, T1543, T1543.003, T1562.001, T1595
• Last Updated: 2021-05-07

details

Detection Profile

• Attacker Tools On Endpoint

• Attempt To Disable Services

• Attempt To delete Services

• Delete A Net User

• Deleting Of Net Users

• Deny Permission using Cacls Utility

• Disable Net User Account

• Disable Windows App Hotkeys

• Disabling Net User Account

• Download Files Using Telegram

• Enumerate Users Local Group Using Telegram

• Excessive Attempt To Disable Services

• Excessive Service Stop Attempt

• Excessive Usage Of Cacls App

• Excessive Usage Of Net App

• Excessive Usage Of Taskkill

• Executables Or Script Creation In Suspicious Path

• Grant Permission Using Cacls Utility

• Hide User Account From Sign-In Screen

• ICACLS Grant Command

• Icacls Deny Command

• Modify ACL permission To Files Or Folder

• Modify ACLs Permission Of Files Or Folders

• Process Kill Base On File Path

• Schtasks Run Task On Demand

• Suspicious Driver Loaded Path

• Suspicious Process File Path

• XMRIG Driver Loaded

ATT&CK

ID	Technique	Tactic
T1036.005	Match Legitimate Name or Location	Defense Evasion
T1595	Active Scanning	Reconnaissance
T1003	OS Credential Dumping	Credential Access
T1489	Service Stop	Impact
T1204.002	Malicious File	Execution
T1485	Data Destruction	Impact
T1531	Account Access Removal	Impact
T1490	Inhibit System Recovery	Impact
T1222	File and Directory Permissions Modification	Defense Evasion
T1021.002	SMB/Windows Admin Shares	Lateral Movement
T1569.002	Service Execution	Execution
T1082	System Information Discovery	Discovery
T1016	System Network Configuration Discovery	Discovery
T1562.001	Disable or Modify Tools	Defense Evasion
T1105	Ingress Tool Transfer	Command And Control
T1087	Account Discovery	Discovery
T1036	Masquerading	Defense Evasion
T1059	Command and Scripting Interpreter	Execution
T1117	Regsvr32
T1202	Indirect Command Execution	Defense Evasion
T1053	Scheduled Task/Job	Execution, Persistence, Privilege Escalation
T1203	Exploitation for Client Execution	Execution
T1072	Software Deployment Tools	Execution, Lateral Movement
T1021.001	Remote Desktop Protocol	Lateral Movement
T1218.011	Rundll32	Defense Evasion
T1486	Data Encrypted for Impact	Impact
T1543.003	Windows Service	Persistence, Privilege Escalation
T1543	Create or Modify System Process	Persistence, Privilege Escalation
T1036.003	Rename System Utilities	Defense Evasion
T1190	Exploit Public-Facing Application	Initial Access

Kill Chain Phase

• Actions on Objectives

• Command and Control

• Exploitation

• Installation

Reference

• https://github.com/xmrig/xmrig

• https://www.getmonero.org/resources/user-guides/mine-to-pool.html

• https://thedfirreport.com/2020/04/20/sqlserver-or-the-miner-in-the-basement/

• https://blog.checkpoint.com/2021/03/11/february-2021s-most-wanted-malware-trickbot-takes-over-following-emotet-shutdown/

version: 1

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Vulnerability

details

Apache Struts Vulnerability

Detect and investigate activities--such as unusually long Content-Type length, suspicious java classes and web servers executing suspicious processes--consistent with attempts to exploit Apache Struts vulnerabilities.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Web
• ATT&CK: T1082
• Last Updated: 2018-12-06

details

Detection Profile

• Get Notable History

• Investigate Suspicious Strings in HTTP Header

• Investigate Web POSTs From src

• Suspicious Java Classes

• Unusually Long Content-Type Length

• Web Servers Executing Suspicious Processes

ATT&CK

ID	Technique	Tactic
T1082	System Information Discovery	Discovery

Kill Chain Phase

• Actions on Objectives

• Delivery

• Exploitation

Reference

• https://github.com/SpiderLabs/owasp-modsecurity-crs/blob/v3.2/dev/rules/REQUEST-944-APPLICATION-ATTACK-JAVA.conf

version: 1

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JBoss Vulnerability

In March of 2016, adversaries were seen using JexBoss--an open-source utility used for testing and exploiting JBoss application servers. These searches help detect evidence of these attacks, such as network connections to external resources or web services spawning atypical child processes, among others.

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Web
• ATT&CK: T1082
• Last Updated: 2017-09-14

details

Detection Profile

• Detect attackers scanning for vulnerable JBoss servers

• Detect malicious requests to exploit JBoss servers

• Get Notable History

ATT&CK

ID	Technique	Tactic
T1082	System Information Discovery	Discovery

Kill Chain Phase

• Delivery

• Reconnaissance

Reference

• http://www.deependresearch.org/2016/04/jboss-exploits-view-from-victim.html

version: 1

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