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Description

The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify the [Adsisearcher] type accelerator being used to query Active Directory for domain groups. Red Teams and adversaries may leverage [Adsisearcher] to enumerate domain groups for situational awareness and Active Directory Discovery.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel: Endpoint
  • Last Updated: 2021-08-25
  • Author: Mauricio Velazco, Splunk
  • ID: 089c862f-5f83-49b5-b1c8-7e4ff66560c7

ATT&CK

ID Technique Tactic
T1069.002 Domain Groups Discovery
`powershell` EventCode=4104 (Message = "*[adsisearcher]*" AND Message = "*(objectcategory=group)*" AND Message = "*findAll()*") 
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode Message ComputerName User 
| `security_content_ctime(firstTime)` 
| `domain_group_discovery_with_adsisearcher_filter`

Associated Analytic Story

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.

Required field

  • _time
  • EventCode
  • Message
  • ComputerName
  • User

Kill Chain Phase

  • Reconnaissance

Known False Positives

Administrators or power users may use Adsisearcher for troubleshooting.

RBA

Risk Score Impact Confidence Message
18.0 30 60 Domain group discovery enumeration using PowerShell 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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