splApache-2.0from splunk/security_content

GetDomainGroup with PowerShell

The following analytic detects the execution of `powershell.exe` with command-line arguments that query for domain groups using `Get-DomainGroup`. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions mapped to the `Processes` node of the `Endpoint` data model. Monitoring this activity is crucial as `Get-DomainGroup` is part of PowerView, a tool often used by adversaries for domain enumeration and situational awareness. If confirmed malicious, this activity could allow attackers to gain insights into domain group structures, aiding in further exploitation and privilege escalation.

Quality

FP risk

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Rule sourcedetections/endpoint/getdomaingroup_with_powershell.yml

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Processes
  WHERE (
        Processes.process_name="powershell.exe"
    )
    (Processes.process=*Get-DomainGroup*)
  BY Processes.action Processes.dest Processes.original_file_name
     Processes.parent_process Processes.parent_process_exec Processes.parent_process_guid
     Processes.parent_process_id Processes.parent_process_name Processes.parent_process_path
     Processes.process Processes.process_exec Processes.process_guid
     Processes.process_hash Processes.process_id Processes.process_integrity_level
     Processes.process_name Processes.process_path Processes.user
     Processes.user_id Processes.vendor_product
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `getdomaingroup_with_powershell_filter`