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Description

This analytic looks for the execution of powershell.exe with command-line arguments utilized to enumerate domain users. Get-DomainUser is part of PowerView, a PowerShell tool used to perform enumeration on Windows domains. Red Teams and adversaries alike may leverage PowerView to enumerate domain users for situational awareness and Active Directory Discovery.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel: Endpoint
  • Last Updated: 2021-08-24
  • Author: Teoderick Contreras, Mauricio Velazco, Splunk
  • ID: 9a5a41d6-04e7-11ec-923c-acde48001122

ATT&CK

ID Technique Tactic
T1087.002 Domain Account Discovery

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where (Processes.process_name="cmd.exe" OR Processes.process_name="powershell*") AND Processes.process = "*Get-DomainUser*" by Processes.dest Processes.user Processes.parent_process Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.parent_process_name 
| `drop_dm_object_name(Processes)` 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `get_domainuser_with_powershell_filter`

Associated Analytic Story

How To Implement

To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.

Required field

  • _time
  • Processes.dest
  • Processes.user
  • Processes.parent_process
  • Processes.process_name
  • Processes.process
  • Processes.process_id
  • Processes.parent_process_id
  • Processes.parent_process_name

Kill Chain Phase

  • Reconnaissance

Known False Positives

Administrators or power users may use this command for troubleshooting.

RBA

Risk Score Impact Confidence Message
25.0 50 50 an instance of process $process_name$ with commandline $process$ in $dest$

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

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