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Description

The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify the execution of the Get-DomainController commandlet. Get-DomainController 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 computers for situational awareness and Active Directory Discovery.

  • Type: TTP

  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud

  • Last Updated: 2021-09-02
  • Author: Mauricio Velazco, Splunk
  • ID: 676b600a-a94d-4951-b346-11329431e6c1

Annotations

ATT&CK
ID Technique Tactic
T1018 Remote System Discovery Discovery
Kill Chain Phase
  • Reconnaissance
NIST
CIS20
CVE 
1
2
3
4

`powershell` EventCode=4104 (Message = "*Get-DomainController*") 
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode Message ComputerName User 
| `security_content_ctime(firstTime)` 
| `getdomaincontroller_with_powershell_script_block_filter`

Macros

The SPL above uses the following Macros:

Note that getdomaincontroller_with_powershell_script_block_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required field

  • _time
  • EventCode
  • Message
  • ComputerName
  • User

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://docs.splunk.com/Documentation/UBA/5.0.4.1/GetDataIn/AddPowerShell#Configure_module_logging_for_PowerShell.

Known False Positives

Administrators or power users may use this PowerShell commandlet for troubleshooting.

Associated Analytic story

RBA

Risk Score Impact Confidence Message
24.0 30 80 Remote system discovery with PowerView on $dest$ by $user$

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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