mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Teoderick Contreras
83 lines
4.2 KiB
YAML
83 lines
4.2 KiB
YAML
name: PowerShell Domain Enumeration
|
|
id: e1866ce2-ca22-11eb-8e44-acde48001122
|
|
version: 10
|
|
date: '2025-07-28'
|
|
author: Michael Haag, Splunk
|
|
status: production
|
|
type: TTP
|
|
description: The following analytic detects the execution of PowerShell commands
|
|
used for domain enumeration, such as `get-netdomaintrust` and
|
|
`get-adgroupmember`. It leverages PowerShell Script Block Logging
|
|
(EventCode=4104) to capture and analyze the full command sent to PowerShell.
|
|
This activity is significant as it often indicates reconnaissance efforts by
|
|
an attacker to map out the domain structure and identify key users and groups.
|
|
If confirmed malicious, this behavior could lead to further targeted attacks,
|
|
privilege escalation, and unauthorized access to sensitive information within
|
|
the domain.
|
|
data_source:
|
|
- Powershell Script Block Logging 4104
|
|
search: '`powershell` EventCode=4104 ScriptBlockText IN (*get-netdomaintrust*, *get-netforesttrust*,
|
|
*get-addomain*, *get-adgroupmember*, *get-domainuser*) | fillnull | stats count
|
|
min(_time) as firstTime max(_time) as lastTime by dest signature signature_id user_id
|
|
vendor_product EventID Guid Opcode Name Path ProcessID ScriptBlockId ScriptBlockText
|
|
| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `powershell_domain_enumeration_filter`'
|
|
how_to_implement: To successfully implement this analytic, you will need to
|
|
enable PowerShell Script Block Logging on some or all endpoints. Additional
|
|
setup here
|
|
https://help.splunk.com/en/security-offerings/splunk-user-behavior-analytics/get-data-in/5.4.1/add-other-data-to-splunk-uba/configure-powershell-logging-to-see-powershell-anomalies-in-splunk-uba.
|
|
known_false_positives: It is possible there will be false positives, filter as
|
|
needed.
|
|
references:
|
|
- https://help.splunk.com/en/security-offerings/splunk-user-behavior-analytics/get-data-in/5.4.1/add-other-data-to-splunk-uba/configure-powershell-logging-to-see-powershell-anomalies-in-splunk-uba.
|
|
- https://blog.palantir.com/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63
|
|
- https://static1.squarespace.com/static/552092d5e4b0661088167e5c/t/59c1814829f18782e24f1fe2/1505853768977/Windows+PowerShell+Logging+Cheat+Sheet+ver+Sept+2017+v2.1.pdf
|
|
- https://www.crowdstrike.com/blog/investigating-powershell-command-and-script-logging/
|
|
- https://www.splunk.com/en_us/blog/security/hunting-for-malicious-powershell-using-script-block-logging.html
|
|
drilldown_searches:
|
|
- name: View the detection results for - "$dest$" and "$user_id$"
|
|
search: '%original_detection_search% | search dest = "$dest$" user_id = "$user_id$"'
|
|
earliest_offset: $info_min_time$
|
|
latest_offset: $info_max_time$
|
|
- name: View risk events for the last 7 days for - "$dest$" and "$user_id$"
|
|
search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$",
|
|
"$user_id$") starthoursago=168 | stats count min(_time) as firstTime max(_time)
|
|
as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk
|
|
Message" values(analyticstories) as "Analytic Stories" values(annotations._all)
|
|
as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics"
|
|
by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
|
|
earliest_offset: $info_min_time$
|
|
latest_offset: $info_max_time$
|
|
rba:
|
|
message: A suspicious powershell script contains domain enumeration command in
|
|
$ScriptBlockText$ in host $dest$
|
|
risk_objects:
|
|
- field: dest
|
|
type: system
|
|
score: 42
|
|
- field: user_id
|
|
type: user
|
|
score: 42
|
|
threat_objects: []
|
|
tags:
|
|
analytic_story:
|
|
- Hermetic Wiper
|
|
- Malicious PowerShell
|
|
- CISA AA23-347A
|
|
- Data Destruction
|
|
- Interlock Ransomware
|
|
asset_type: Endpoint
|
|
mitre_attack_id:
|
|
- T1059.001
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data:
|
|
https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1059.001/powershell_script_block_logging/enumeration.log
|
|
source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
|
|
sourcetype: XmlWinEventLog
|