Enumeration of Privileged Local Groups Membership
editEnumeration of Privileged Local Groups Membership
editIdentifies 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-system.*
Severity: medium
Risk score: 43
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References: None
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Discovery
Version: 3
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
edit## Config This will require Windows security event 4799 by enabling audit success for the Windows Account Management category and the Security Group Management subcategory. If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
Rule query
editiam 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"))
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/
-
Sub-technique:
- Name: Local Groups
- ID: T1069.001
- Reference URL: https://attack.mitre.org/techniques/T1069/001/