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Description

The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify the execution of the Get-DomainUser commandlet. GetDomainUser is part of PowerView, a PowerShell tool used to perform enumeration on Windows domains. Red Teams and adversaries alike may use 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: 61994268-04f4-11ec-865c-acde48001122

ATT&CK

ID Technique Tactic
T1087.002 Domain Account Discovery
`powershell` EventCode=4104 Message = "*Get-DomainUser*" 
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode Message ComputerName User 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `get_domainuser_with_powershell_script_block_filter`

Associated Analytic Story

How To Implement

The following Hunting analytic requires PowerShell operational logs to be imported. Modify the powershell macro as needed to match the sourcetype or add index. This analytic is specific to 4104, or PowerShell Script Block Logging.

Required field

  • _time
  • EventCode
  • Message
  • ComputerName
  • User

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 powershell process having commandline $Message$ for user enumeration

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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