MediumSigmaHQ OTR (Open Threat Research)

DCERPC SMB Spoolss Named Pipe

Detects the use of the spoolss named pipe over SMB. This can be used to trigger the authentication via NTLM of any machine that has the spoolservice enabled.

Detection logic

Detection requirements

Platform: Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: windows
Log source service: security

Known benign triggers

Domain Controllers acting as printer servers too? :)

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
dirkjanm.io/a-different-way-of-abusing-zerologon/	Unclassified	2
posts.specterops.io/hunting-in-active-directory-unconstrained-delegation-forests-trusts-71f2b33688e1	Security research	4
twitter.com/_dirkjan/status/1309214379003588608	Social post	2

Detection rules

DCERPC SMB Spoolss Named Pipe

Detection logic

Detection requirements

Known benign triggers

MITRE ATT&CK mappings

References

From the source

Licence

Authorship

Detection rules