splApache-2.0from splunk/security_content
Windows AD Same Domain SID History Addition
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.
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Rule sourcedetections/endpoint/windows_ad_same_domain_sid_history_addition.yml
`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 dest | `windows_ad_same_domain_sid_history_addition_filter`