splApache-2.0from splunk/security_content

Windows AD Object Owner Updated

AD Object Owner Updated. The owner provides Full control level privileges over the target AD Object. This event has significant impact alone and is also a precursor activity for hiding an AD object.

Quality

FP risk

—

Forks

Views

Rule sourcedetections/endpoint/windows_ad_object_owner_updated.yml

`wineventlog_security` EventCode=5136
  | stats min(_time) as _time values(eval(if(OperationType=="%%14675",AttributeValue,null))) as old_value values(eval(if(OperationType=="%%14674",AttributeValue,null))) as new_value values(OperationType) as OperationType values(dest) as dest
    BY ObjectClass ObjectDN OpCorrelationID
       src_user SubjectLogonId DSName
  | rex field=old_value "O:(?P<old_owner>.*?)G:"
  | rex field=new_value "O:(?P<new_owner>.*?)G:"
  | where old_owner!=new_owner ``` optional SID resolution lookups
  | lookup identity_lookup_expanded objectSid as new_owner OUTPUT downLevelDomainName as new_owner_user
  | lookup admon_groups_def objectSid as new_owner OUTPUT cn as new_owner_group
  | lookup identity_lookup_expanded objectSid as old_owner OUTPUT downLevelDomainName as old_owner_user
  | lookup admon_groups_def objectSid as old_owner OUTPUT cn as old_owner_group ```
  | lookup builtin_groups_lookup builtin_group_string  as new_owner_group OUTPUT builtin_group_name as new_owner_group_builtin_group
  | lookup builtin_groups_lookup builtin_group_string  as old_owner OUTPUT builtin_group_name as old_owner_group_builtin_group
  | eval user=coalesce(new_owner_user, new_owner_group, new_owner_group_builtin_group, new_owner), previousOwner=coalesce(old_owner_user, old_owner_group, old_owner_group_builtin_group, old_owner)
  | stats values(previousOwner) as previousOwner values(user) as user values(SubjectLogonId) as SubjectLogonId
    BY _time ObjectClass ObjectDN
       src_user OpCorrelationID DSName
  | `windows_ad_object_owner_updated_filter`