Sigma medium test sigma
Active Directory Replication from Non Machine Account - DcSync Indicator
Detects potential abuse of Active Directory Replication Service (ADRS) from a non machine account to request credentials.
Detection Logic
{
"selection": {
"EventID": 4662,
"Properties
| contains": [
"1131f6ad-9c07-11d1-f79f-00c04fc2dcd2",
"1131f6aa-9c07-11d1-f79f-00c04fc2dcd2",
"9923a32a-3607-11d2-b9be-0000f87a36b2",
"89e95b76-444d-4c62-991a-0facbeda640c"
]
},
"filter_main_machine_accounts": {
"SubjectUserName
| endswith": "$"
},
"filter_optional_subject_domain": {
"SubjectDomainName": "Window Manager"
},
"filter_optional_subject_usersid": {
"SubjectUserName
| startswith": [
"NT AUT",
"MSOL_"
]
},
"condition": "selection and not 1 of filter_main_* and not 1 of filter_optional_*"
} False Positives
- ⚠ Unknown
Field Validations
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