Group Policy Abuse for Privilege Addition

Author: Elastic
Source: upstream

Detects the first occurrence of a modification to Group Policy Object Attributes to add privileges to user accounts or use them to add users as local admins.

MITRE ATT&CK coverage

Tactic	Techniques
Privilege Escalation	`T1484` Domain or Tenant Policy Modification, `T1484.001` Domain or Tenant Policy Modification: Group Policy Modification
Defense Evasion	`T1484` Domain or Tenant Policy Modification, `T1484.001` Domain or Tenant Policy Modification: Group Policy Modification

Event coverage

Provider	Event ID	Title
Security-Auditing	5136	A directory service object was modified.

Stages and Predicates

Stage 1: `eql:any`

winlog.event_data.AttributeLDAPDisplayName:"gPCMachineExtensionNames" and winlog.event_data.AttributeValue:"803E14A0-B4FB-11D0-A0D0-00A0C90F574B" and winlog.event_data.AttributeValue:"827D319E-6EAC-11D2-A4EA-00C04F79F83A"

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.