splunk-security_content/docs/_posts/2021-08-26-getdomaingroup_with_powershell_script_block.md

title, excerpt, categories, last_modified_at, toc, toc_label, tags

title	excerpt	categories	last_modified_at	toc	toc_label	tags
GetDomainGroup with PowerShell Script Block	Permission Groups Discovery, Domain Groups	Endpoint	2021-08-26	true		Permission Groups Discovery Discovery Domain Groups Discovery Splunk Enterprise Splunk Enterprise Security Splunk Cloud Endpoint

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Description

The following analytic utilizes PowerShell Script Block Logging (EventCode=4104) to identify the execution of the Get-DomainGroup commandlet. Get-DomainGroup is part of PowerView, a PowerShell tool used to perform enumeration on Windows domains. As the name suggests, Get-DomainGroup is used to query domain groups. Red Teams and adversaries may leverage this function 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: 2021-08-26
• Author: Mauricio Velazco, Splunk
• ID: 09725404-a44f-4ed3-9efa-8ed5d69e4c53

ATT&CK

ID	Technique	Tactic
T1069	Permission Groups Discovery	Discovery

| T1069.002 | Domain Groups | Discovery |

Search

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

Associated Analytic Story

• Active Directory Discovery

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 this PowerView functions for troubleshooting.

RBA

Risk Score	Impact	Confidence	Message
15.0	30	50	Domain group discovery enumeration using PowerView on dest by user

Reference

• https://attack.mitre.org/techniques/T1069/002/
• https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainGroup/

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

• https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1069.002/AD_discovery/windows-powershell.log

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