Posture check · Group Policy
Link-Local Multicast Name Resolution not turned off by Group Policy (T1557.001)
No Group Policy turns off Link-Local Multicast Name Resolution for the Windows computers in this container.
Why it matters
Anyone on the same network can answer these computers' name lookups and capture the credentials they send.
How GraphnAI finds it
It runs after every sync, on each connected domain or tenant on its own. It applies to Active Directory.
It reads:
- The directory attributes
gPLink,gPOptions,flags,userAccountControl,accountEnabled,distinguishedName,gPCWQLFilter,nTSecurityDescriptor,operatingSystemandlastLogonTimestamp - The Group Policy files the Identity Bridge reads from SYSVOL
- The privilege tier classification
Tiered Fidelity™ level: Theoretical
Every finding from this check carries the Theoretical level.
- TheoreticalThis checkConfigured in the directory. Nothing else checked.
- ConstrainedA constraint on it has been checked.
- ValidatedTelemetry has seen it in use.
Why there's no automatic fix
GraphnAI can't edit Group Policy settings. Change this setting in Group Policy Management.
How to fix it
Enable 'Turn off multicast name resolution' in a policy linked to this container or above it. Make sure no policy closer to the computers turns it back on.
MITRE ATT&CK® technique names and MITRE D3FEND™ technique labels: © The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. ATT&CK® is a registered trademark and D3FEND™ a trademark of The MITRE Corporation.
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