splunk-security_content/docs/_posts/2021-08-25-getwmiobject_ds_group_with_powershell.md

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title	excerpt	categories	last_modified_at	toc	toc_label	tags
GetWmiObject Ds Group with PowerShell	Permission Groups Discovery, Domain Groups	Endpoint	2021-08-25	true		Permission Groups Discovery Discovery Domain Groups Discovery Splunk Enterprise Splunk Enterprise Security Splunk Cloud Endpoint

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Description

This analytic looks for the execution of powershell.exe with command-line arguments utilized to query for domain groups. The Get-WmiObject commandlet combined with the -class ds_group parameter can be used to return the full list of groups in a Windows domain. Red Teams and adversaries alike may leverage WMI in this case, using PowerShell, 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: df275a44-4527-443b-b884-7600e066e3eb

ATT&CK

ID	Technique	Tactic
T1069	Permission Groups Discovery	Discovery

| T1069.002 | Domain Groups | Discovery |

Search

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where (Processes.process_name="powershell.exe") (Processes.process=*Get-WmiObject* AND Processes.process="*namespace root\\directory\\ldap*" AND Processes.process="*class ds_group*") by Processes.dest Processes.user Processes.parent_process Processes.process_name Processes.process Processes.process_id Processes.parent_process_id 
| `drop_dm_object_name(Processes)` 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `getwmiobject_ds_group_with_powershell_filter`

Associated Analytic Story

• Active Directory Discovery

How To Implement

To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the Endpoint datamodel in the Processes node.

Required field

• Processes.dest
• Processes.user
• Processes.parent_process_name
• Processes.parent_process
• Processes.original_file_name
• Processes.process_name
• Processes.process
• Processes.process_id
• Processes.parent_process_path
• Processes.process_path
• Processes.parent_process_id

Kill Chain Phase

• Reconnaissance

Known False Positives

Administrators or power users may use this command for troubleshooting.

RBA

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

Reference

• https://attack.mitre.org/techniques/T1069/002/
• https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/get-wmiobject?view=powershell-5.1

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-sysmon.log

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