IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Enumeration of Privileged Local Groups Membershipedit
Identifies instances of an unusual process enumerating built-in Windows privileged local groups membership like Administrators or Remote Desktop users.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-windows.*
Severity: medium
Risk score: 43
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Discovery
Version: 1
Added (Elastic Stack release): 8.0.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guideedit
## Config This will require Windows security event 4799 by enabling audit success for the windows Account Management category and the Security Group Management subcategory.
Rule queryedit
iam where event.action == "user-member-enumerated" and /* noisy and usual legit processes excluded */ not winlog.event_data.CallerProcessName: ("?:\\Windows\\System32\\VSSVC.exe", "?:\\Windows\\System32\\SearchIndexer.exe", "?:\\Windows\\System32\\CompatTelRunner.exe", "?:\\Windows\\System32\\oobe\\msoobe.exe", "?:\\Windows\\System32\\net1.exe", "?:\\Windows\\System32\\svchost.exe", "?:\\Windows\\System32\\Netplwiz.exe", "?:\\Windows\\System32\\msiexec.exe", "?:\\Windows\\System32\\CloudExperienceHostBroker.exe", "?:\\Windows\\System32\\wbem\\WmiPrvSE.exe", "?:\\Windows\\System32\\SrTasks.exe", "?:\\Windows\\System32\\lsass.exe", "?:\\Windows\\System32\\diskshadow.exe", "?:\\Windows\\System32\\dfsrs.exe", "?:\\Program Files\\*.exe", "?:\\Program Files (x86)\\*.exe") and /* privileged local groups */ (group.name:("admin*","RemoteDesktopUsers") or winlog.event_data.TargetSid:("S-1-5-32-544","S-1-5-32-555"))
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
-
Technique:
- Name: Permission Groups Discovery
- ID: T1069
- Reference URL: https://attack.mitre.org/techniques/T1069/