Branch was auto-updated.

detections/endpoint/impacket_lateral_movement_commandline_parameters.yml

@@ -47,7 +47,7 @@ tags:
   asset_type: Endpoint
   confidence: 70
   impact: 90
-  message: Suspicious command line parameters on $dest may represent a lateral movement
+  message: Suspicious command line parameters on $dest$ may represent a lateral movement
     attack with Impackets tools
   mitre_attack_id:
   - T1021

detections/endpoint/impacket_lateral_movement_smbexec_commandline_parameters.yml

@@ -0,0 +1,65 @@
+name: Impacket Lateral Movement smbexec CommandLine Parameters
+id: bb3c1bac-6bdf-4aa0-8dc9-068b8b712a76
+version: 1
+date: '2023-04-25'
+author: Michael Haag, Splunk
+status: production
+type: TTP
+data_source:
+- Sysmon Event ID 1
+- Windows Security 4688
+description: This analytic focuses on identifying suspicious command-line parameters commonly associated with the use of Impacket wmiexec.py. Impacket is a set of Python classes designed for working with Microsoft network protocols, and it includes several scripts like wmiexec.py, smbexec.py, dcomexec.py, and atexec.py that enable command execution on remote endpoints. These scripts typically utilize administrative shares and hardcoded parameters, which can serve as signatures to detect their usage. Both Red Teams and adversaries may employ Impacket tools for lateral movement and remote code execution purposes. By monitoring for these specific command-line indicators, the analytic aims to detect potentially malicious activities related to Impacket tool usage.
+search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_name=cmd.exe by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id 
+  | `drop_dm_object_name(Processes)` 
+  | where match(process, "(?i)cmd\.exe\s+\/Q\s+\/c") AND match(process,"(?i)echo\s+cd") AND match(process, "(?i)\\__output") AND  match(process, "(?i)C:\\\\Windows\\\\[a-zA-Z]{1,8}\\.bat")  AND match(process, "\\\\127\.0\.0\.1\\.*")
+  | `security_content_ctime(firstTime)` 
+  | `security_content_ctime(lastTime)` | `impacket_lateral_movement_smbexec_commandline_parameters_filter`'
+how_to_implement: To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product.
+known_false_positives: Although uncommon, Administrators may leverage Impackets tools
+  to start a process on remote systems for system administration or automation use
+  cases.
+references:
+- https://attack.mitre.org/techniques/T1021/002/
+- https://attack.mitre.org/techniques/T1021/003/
+- https://attack.mitre.org/techniques/T1047/
+- https://attack.mitre.org/techniques/T1053/
+- https://attack.mitre.org/techniques/T1053/005/
+- https://github.com/SecureAuthCorp/impacket
+- https://vk9-sec.com/impacket-remote-code-execution-rce-on-windows-from-linux/
+- https://www.microsoft.com/security/blog/2022/01/15/destructive-malware-targeting-ukrainian-organizations/
+tags:
+  analytic_story:
+  - Industroyer2
+  - Active Directory Lateral Movement
+  - Prestige Ransomware
+  - CISA AA22-277A
+  - Data Destruction
+  - WhisperGate
+  asset_type: Endpoint
+  atomic_guid: []
+  confidence: 70
+  impact: 90
+  message: Suspicious command-line parameters on $dest$ may represent lateral movement using smbexec.
+  mitre_attack_id:
+  - T1021
+  - T1021.002
+  - T1021.003
+  - T1047
+  - T1543.003
+  observable:
+  - name: dest
+    type: Endpoint
+    role:
+    - Victim
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  risk_score: 63
+  security_domain: endpoint
+tests:
+- name: True Positive Test
+  attack_data:
+  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1021.002/atomic_red_team/smbexec_windows-sysmon.log
+    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
+    sourcetype: xmlwineventlog

detections/endpoint/impacket_lateral_movement_wmiexec_commandline_parameters.yml

@@ -0,0 +1,72 @@
+name: Impacket Lateral Movement WMIExec Commandline Parameters
+id: d6e464e4-5c6a-474e-82d2-aed616a3a492
+version: 1
+date: '2023-04-21'
+author: Michael Haag, Splunk
+status: production
+type: TTP
+data_source:
+- Sysmon Event ID 1
+- Windows Security 4688
+description: This analytic looks for the presence of suspicious commandline parameters
+  typically present when using Impacket tools. Impacket is a collection of python
+  classes meant to be used with Microsoft network protocols. There are multiple scripts
+  that leverage impacket libraries like `wmiexec.py`, `smbexec.py`, `dcomexec.py`
+  and `atexec.py` used to execute commands on remote endpoints. By default, these
+  scripts leverage administrative shares and hardcoded parameters that can be used
+  as a signature to detect its use. Red Teams and adversaries alike may leverage Impackets
+  tools for lateral movement and remote code execution.
+search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.parent_process_name=wmiprvse.exe by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id 
+  | `drop_dm_object_name(Processes)` 
+  | where match(process, "(?i)cmd\.exe\s+\/Q\s+\/c") AND match(process, "\\\\127\.0\.0\.1\\.*") AND match(process, "__\\d{1,10}\\.\\d{1,10}")
+  | `security_content_ctime(firstTime)` 
+  | `security_content_ctime(lastTime)`| `impacket_lateral_movement_wmiexec_commandline_parameters_filter`'
+how_to_implement: To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product.
+known_false_positives: Although uncommon, Administrators may leverage Impackets tools
+  to start a process on remote systems for system administration or automation use
+  cases.
+references:
+- https://attack.mitre.org/techniques/T1021/002/
+- https://attack.mitre.org/techniques/T1021/003/
+- https://attack.mitre.org/techniques/T1047/
+- https://attack.mitre.org/techniques/T1053/
+- https://attack.mitre.org/techniques/T1053/005/
+- https://github.com/SecureAuthCorp/impacket
+- https://vk9-sec.com/impacket-remote-code-execution-rce-on-windows-from-linux/
+- https://www.microsoft.com/security/blog/2022/01/15/destructive-malware-targeting-ukrainian-organizations/
+tags:
+  analytic_story:
+  - Industroyer2
+  - Active Directory Lateral Movement
+  - Prestige Ransomware
+  - CISA AA22-277A
+  - Data Destruction
+  - WhisperGate
+  asset_type: Endpoint
+  atomic_guid: []
+  confidence: 70
+  impact: 90
+  message: Suspicious command-line parameters on $dest$ may represent lateral movement using wmiexec.
+  mitre_attack_id:
+  - T1021
+  - T1021.002
+  - T1021.003
+  - T1047
+  - T1543.003
+  observable:
+  - name: dest
+    type: Endpoint
+    role:
+    - Victim
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  risk_score: 63
+  security_domain: endpoint
+tests:
+- name: True Positive Test
+  attack_data:
+  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1021.002/atomic_red_team/wmiexec_windows-sysmon.log
+    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
+    sourcetype: xmlwineventlog