User Added to Privileged Group in Active Directory

Identifies a user being added to a privileged group in Active Directory. Privileged accounts and groups in Active Directory are those to which powerful rights, privileges, and permissions are granted that allow them to perform nearly any action in Active Directory and on domain-joined systems.

Rule type: eql

Rule indices:

winlogbeat-*
logs-windows.*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/plan/security-best-practices/appendix-b—privileged-accounts-and-groups-in-active-directory

Tags:

Elastic
Host
Windows
Threat Detection
Persistence

Version: 3 (version history)

Added (Elastic Stack release): 7.12.0

Last modified (Elastic Stack release): 7.16.0

Rule authors: Elastic, Skoetting

Rule license: Elastic License v2

Rule query

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iam where event.action == "added-member-to-group" and group.name :
("Admin*", "Local Administrators",
"Domain Admins", "Enterprise Admins",
"Backup Admins", "Schema Admins",
"DnsAdmins", "Exchange Organization Administrators")

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Technique:
- Name: Account Manipulation
- ID: T1098
- Reference URL: https://attack.mitre.org/techniques/T1098/

Rule version history

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Version 3 (7.16.0 release)

Formatting only

Version 2 (7.13.0 release)

Updated query, changed from:

event.category:iam and event.action:"added-member-to-group" and
group.name:(Administrators or "Local Administrators" or "Domain
Admins" or "Enterprise Admins" or "Backup Admins" or "Schema Admins"
or "DnsAdmins")

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