Possible DCSync Attack
Detects remote RPC calls to MS-DRSR from non DC hosts, which could indicate DCSync / DCShadow attacks.
Detection logic
Detection requirements
- Platform
- LinuxmacOSNetwork DevicesWindows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
- Log source product
- rpc_firewall
- Log source category
- application
Known benign triggers
- Unknown
MITRE ATT&CK mappings
0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.
References
| Reference | Cited by |
|---|---|
| github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-DRSR.md | Only this detection cites it |
| github.com/zeronetworks/rpcfirewall | 17 |
| learn.microsoft.com/en-us/openspecs/windows_protocols/ms-drsr/f977faaa-673e-4f66-b9bf-48c640241d47?redirectedfrom=MSDN | Only this detection cites it |
| zeronetworks.com/blog/stopping-lateral-movement-via-the-rpc-firewall/ | 17 |
From the source
- At source
- Open at source
- Upstream identifier
- 56fda488-113e-4ce9-8076-afc2457922c3
- Tagged by the source as
- attack.discovery
Licence
- Published under
- Detection Rule License 1.1Read the licence
- Attribution
- Required
Authorship
- Written by
- Published
- Aug 26, 2026
- Version
- 1