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

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

title	excerpt	categories	last_modified_at	toc	toc_label	tags
Elevated Group Discovery With Net	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 net.exe or net1.exe with command-line arguments utilized to query for specific elevated domain groups. Red Teams and adversaries alike use net.exe to enumerate elevated domain groups for situational awareness and Active Directory Discovery to identify high privileged users.

• Type: TTP
• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• Last Updated: 2021-08-25
• Author: Mauricio Velazco, Splunk
• ID: a23a0e20-0b1b-4a07-82e5-ec5f70811e7a

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="net.exe" OR Processes.process_name="net1.exe") (Processes.process="*group*" AND Processes.process="*/do*") (Processes.process="*Domain Admins*" OR Processes.process="*Enterprise Admins*" OR Processes.process="*Schema Admins*" OR Processes.process="*Account Operators*" OR Processes.process="*Server Operators*" OR Processes.process="*Protected Users*" OR Processes.process="*Dns Admins*") 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)` 
| `elevated_group_discovery_with_net_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
21.0	30	70	Elevated domain group discovery enumeration on dest by user

Reference

• https://attack.mitre.org/techniques/T1069/002/
• https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/plan/security-best-practices/appendix-b--privileged-accounts-and-groups-in-active-directory
• https://adsecurity.org/?p=3658

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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