Anomalous Windows GPO Modification Outside Usual Working Hours
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About the rule
Rule Type
Anomaly
Rule Description
Detects Group Policy changes occurring outside regular working hours.
Severity
Critical
Rule Requirement
Criteria
Action1:
actionname = "GPO modified"
| isanomalous(User at an unusual Time)
| isanomalous(User with abnormal Count)
| isanomalous(Log source at an unusual Time)
| isanomalous(Log source with abnormal Count)
| isanomalous(Log source with unusual Username)
| isanomalous(User with unusual Log source)
| isanomalous(User with unusual Object Name)
select Action1.HOSTNAME,Action1.MESSAGE,Action1.DOMAIN,Action1.OPERATION_TYPE,Action1.TARGETDOMAIN,Action1.USERNAME,Action1.CHANGES,Action1.DISPLAYNAME,Action1.OBJECTNAME,Action1.SHAREPATH,Action1.DN,Action1.ACCESSES,Action1.GUID,Action1.SECURITYID
Detection
Execution Mode
Intelligent
Log Sources
Active Directory
