Detection rules › Sigma

Possible DC Shadow Attack

Severity
medium
Author
Ilyas Ochkov, oscd.community, Chakib Gzenayi (@Chak092), Hosni Mribah
Source
upstream

Detects DCShadow via create new SPN

MITRE ATT&CK coverage

TacticTechniques
Defense EvasionT1207 Rogue Domain Controller

Event coverage

ProviderEvent IDTitle
Security-Auditing4742A computer account was changed.
Security-Auditing5136A directory service object was modified.

Stages and Predicates

Stage 1: 1 of selection1

ServicePrincipalNames|contains: 'GC/'

Stage 2: 1 of selection2

AttributeLDAPDisplayName: servicePrincipalName
AttributeValue|startswith: 'GC/'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
AttributeLDAPDisplayNameeq
  • servicePrincipalName corpus 6 (splunk 3, sigma 2, elastic 1)
AttributeValuestarts_with
  • GC/
ServicePrincipalNamesmatch
  • GC/