diff --git a/detections/endpoint/windows_ad_domain_replication_acl_addition.yml b/detections/endpoint/windows_ad_domain_replication_acl_addition.yml index 6305fb636c..e31ea107f3 100644 --- a/detections/endpoint/windows_ad_domain_replication_acl_addition.yml +++ b/detections/endpoint/windows_ad_domain_replication_acl_addition.yml @@ -13,7 +13,7 @@ description: - DS-Replication-Get-Changes-All Certain Sync operations may require the additional permission of DS-Replication-Get-Changes-In-Filtered-Set. By default, adding DCSync permissions via the Powerview Add-ObjectACL operation adds all 3. This alert identifies where this trifecta has been met, and also where just the base level requirements have been met. -search: '`wineventlog_security` | rex field=AttributeValue max_match=10000 \"OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;(?PS-1-[0-59]-\d{2}-\d{8,10}-\d{8,10}-\d{8,10}-[1-9]\d{3})\)\"| table _time dest src_user DSRGetChanges_user_sid DSRGetChangesAll_user_sid DSRGetChangesFiltered_user_sid| mvexpand DSRGetChanges_user_sid| eval minDCSyncPermissions=if(DSRGetChanges_user_sid=DSRGetChangesAll_user_sid,\"true\",\"false\"), fullSet=if(DSRGetChanges_user_sid=DSRGetChangesAll_user_sid AND DSRGetChanges_user_sid=DSRGetChangesFiltered_user_sid,\"true\",\"false\")| where minDCSyncPermissions=\"true\" | lookup identity_lookup_expanded objectSid as DSRGetChanges_user_sid OUTPUT sAMAccountName as user | rename DSRGetChanges_user_sid as userSid | stats min(_time) as _time values(user) as user by dest src_user userSid minDCSyncPermissions fullSet| `windows_ad_domain_replication_acl_addition_filter`' +search: '`wineventlog_security` | rex field=AttributeValue max_match=10000 "OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;(?PS-1-[0-59]-\d{2}-\d{8,10}-\d{8,10}-\d{8,10}-[1-9]\d{3})\)"| table _time dest src_user DSRGetChanges_user_sid DSRGetChangesAll_user_sid DSRGetChangesFiltered_user_sid| mvexpand DSRGetChanges_user_sid| eval minDCSyncPermissions=if(DSRGetChanges_user_sid=DSRGetChangesAll_user_sid,"true","false"), fullSet=if(DSRGetChanges_user_sid=DSRGetChangesAll_user_sid AND DSRGetChanges_user_sid=DSRGetChangesFiltered_user_sid,"true","false")| where minDCSyncPermissions="true" | lookup identity_lookup_expanded objectSid as DSRGetChanges_user_sid OUTPUT sAMAccountName as user | rename DSRGetChanges_user_sid as userSid | stats min(_time) as _time values(user) as user by dest src_user userSid minDCSyncPermissions fullSet| `windows_ad_domain_replication_acl_addition_filter`' how_to_implement: To successfully implement this search, you need to be ingesting the eventcode 5136. The Advanced Security Audit policy setting `Audit Directory Services Changes` within `DS Access` needs to be enabled, alongside a SACL for `everybody` to `Write All Properties`