mirror of
https://github.com/splunk/security_content
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Bhavin Patel
63 lines
2.5 KiB
YAML
63 lines
2.5 KiB
YAML
name: GetAdGroup with PowerShell Script Block
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id: e4c73d68-794b-468d-b4d0-dac1772bbae7
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version: 3
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date: '2024-05-22'
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author: Mauricio Velazco, Splunk
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status: production
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type: Hunting
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description: The following analytic detects the execution of the `Get-AdGroup` PowerShell
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cmdlet using PowerShell Script Block Logging (EventCode=4104). This cmdlet is used
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to enumerate all domain groups, which adversaries may exploit for situational awareness
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and Active Directory discovery. Monitoring this activity is crucial as it can indicate
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reconnaissance efforts within the network. If confirmed malicious, this behavior
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could lead to further exploitation, such as privilege escalation or lateral movement,
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by providing attackers with detailed information about the domain's group structure.
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data_source:
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- Powershell Script Block Logging 4104
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search: '`powershell` EventCode=4104 ScriptBlockText = "*Get-ADGroup*" | stats count
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min(_time) as firstTime max(_time) as lastTime by EventCode ScriptBlockText Computer
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UserID | rename Computer as dest, UserID as user | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `getadgroup_with_powershell_script_block_filter`'
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how_to_implement: To successfully implement this analytic, you will need to enable
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PowerShell Script Block Logging on some or all endpoints. Additional setup here
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https://docs.splunk.com/Documentation/UBA/5.0.4.1/GetDataIn/AddPowerShell#Configure_module_logging_for_PowerShell.
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known_false_positives: Administrators or power users may use this PowerShell commandlet
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for troubleshooting.
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references:
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- https://attack.mitre.org/techniques/T1069/002/
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- https://docs.microsoft.com/en-us/powershell/module/activedirectory/get-adgroup?view=windowsserver2019-ps
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tags:
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analytic_story:
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- Active Directory Discovery
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asset_type: Endpoint
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confidence: 50
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impact: 30
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message: Domain group discovery enumeration using PowerShell on $dest$ by $user$
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mitre_attack_id:
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- T1069
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- T1069.002
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observable:
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- name: dest
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type: Endpoint
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role:
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- Victim
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- EventCode
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- Message
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- Computer
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- UserID
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risk_score: 15
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1069.002/AD_discovery/windows-powershell-xml.log
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source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
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sourcetype: xmlwineventlog
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