Name:Windows AD Same Domain SID History Addition id:5fde0b7c-df7a-40b1-9b3a-294c00f0289d version:5 date:2024-11-28 author:Dean Luxton status:production type:TTP Description:The following analytic detects changes to the sIDHistory attribute of user or computer objects within the same domain. It leverages Windows Security Event Codes 4738 and 4742 to identify when the sIDHistory attribute is modified. This activity is significant because the sIDHistory attribute can be abused by adversaries to grant unauthorized access by inheriting permissions from another account. If confirmed malicious, this could allow attackers to maintain persistent access or escalate privileges within the domain, posing a severe security risk. Data_source:
-Windows Event Log Security 4742
-Windows Event Log Security 4738
search:`wineventlog_security` (EventCode=4742 OR EventCode=4738) NOT SidHistory IN ("%%1793", -) | rex field=SidHistory "(^%{|^)(?P<SidHistoryMatch>.*)(\-|\\\)" | rex field=TargetSid "^(?P<TargetSidmatch>.*)(\-|\\\)" | where SidHistoryMatch=TargetSidmatch OR SidHistoryMatch=TargetDomainName | rename TargetSid as userSid, TargetDomainName as userDomainName | table _time action status host user userSid userDomainName SidHistory Logon_ID src_user | `windows_ad_same_domain_sid_history_addition_filter`
how_to_implement:To successfully implement this search, you need to be ingesting eventcodes `4738` and `4742`. The Advanced Security Audit policy settings `Audit User Account Management` and `Audit Computer Account Management` within `Account Management` all need to be enabled. SID resolution is not required.. known_false_positives:Unknown References: -https://adsecurity.org/?p=1772 -https://learn.microsoft.com/en-us/windows/win32/adschema/a-sidhistory?redirectedfrom=MSDN -https://learn.microsoft.com/en-us/defender-for-identity/security-assessment-unsecure-sid-history-attribute -https://book.hacktricks.xyz/windows-hardening/active-directory-methodology/sid-history-injection drilldown_searches: name:'View the detection results for - "$src_user$" and "$user$"' search:'%original_detection_search% | search src_user = "$src_user$" user = "$user$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$src_user$" and "$user$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$src_user$", "$user$") 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: - 'Compromised Windows Host' - 'Windows Persistence Techniques' - 'Sneaky Active Directory Persistence Tricks' asset_type:Endpoint confidence:100 impact:100 message:Active Directory SID History Attribute was added to $user$ by $src_user$ mitre_attack_id: - 'T1134.005' - 'T1134' observable: name:'src_user' type:'User' - role: - 'Victim' name:'user' type:'User' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' required_fields: - '_time' - 'EventCode' - 'SidHistory' - 'TargetSid' - 'TargetDomainName' - 'user' - 'src_user' - 'Logon_ID' risk_score:100 security_domain:endpoint
