Name:Windows AD GPO Disabled id:72793bc0-c0cd-400e-9e60-fdf36f278917 version:2 date:2024-09-30 author:Dean Luxton status:production type:TTP Description:This detection identifies when an Active Directory Group Policy is disabled using the Group Policy Management Console. Data_source:
-Windows Security 5136
search:`wineventlog_security` EventCode=5136 AttributeLDAPDisplayName=flags OperationType="%%14674" AttributeValue!=0 | eval AttributeValueExp=case(AttributeValue==0,"Enabled",AttributeValue==1,"User configuration settings disabled",AttributeValue==2,"Computer configuration settings disabled",AttributeValue==3,"Disabled"), ObjectDN=upper(ObjectDN) | join ObjectDN type=inner [| search `admon` objectCategory="CN=Group-Policy-Container*" admonEventType=Update | eval ObjectDN=upper(distinguishedName) | stats latest(displayName) as displayName by ObjectDN ] | stats min(_time) as _time values(AttributeValue) as AttributeValue values(AttributeValueExp) as AttributeValueExp values(OpCorrelationID) as OpCorrelationID values(displayName) as policyName values(src_user) as src_user by ObjectDN SubjectLogonId | `windows_ad_gpo_disabled_filter`
how_to_implement:Ensure you are ingesting Active Directory audit logs - specifically event 5136, admon data is also used to display the display name of the GPO. See lantern article in references for further on how to onboard AD audit data. Ensure the wineventlog_security and admon macros are configured with the correct indexes. known_false_positives:Unknown References: -https://lantern.splunk.com/Security/Product_Tips/Enterprise_Security/Enabling_an_audit_trail_from_Active_Directory drilldown_searches: name:'View the detection results for - "$src_user$"' search:'%original_detection_search% | search src_user = "$src_user$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$src_user$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$src_user$") starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' tags: analytic_story: - 'Sneaky Active Directory Persistence Tricks' asset_type:Endpoint confidence:80 impact:80 message:$src_user$ has disabled GPO $policyName$ mitre_attack_id: - 'T1562.001' - 'T1484.001' observable: name:'src_user' type:'User' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' risk_score:64 required_fields: - '_time' - 'OperationType' - 'ObjectDN' - 'OpCorrelationID' - 'src_user' - 'AttributeLDAPDisplayName' - 'AttributeValue' - 'ObjectClass' - 'SubjectLogonId' - 'DSName' security_domain:endpoint
