Active Directory Group Modification by SYSTEM
editActive Directory Group Modification by SYSTEMedit
Identifies a user being added to an active directory group by the SYSTEM (S-1-5-18) user. This behavior can indicate that the attacker has achieved SYSTEM privileges in a domain controller, which attackers can obtain by exploiting vulnerabilities or abusing default group privileges (e.g., Server Operators), and is attempting to pivot to a domain account.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-system.security*
- logs-windows.forwarded*
Severity: medium
Risk score: 47
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:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Persistence
- Use Case: Active Directory Monitoring
- Data Source: Active Directory
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
iam where winlog.api == "wineventlog" and event.code == "4728" and winlog.event_data.SubjectUserSid : "S-1-5-18" and /* DOMAIN_USERS and local groups */ not group.id : "S-1-5-21-*-513"
Framework: MITRE ATT&CKTM
-
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/
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Account Manipulation
- ID: T1098
- Reference URL: https://attack.mitre.org/techniques/T1098/