Suspicious NTLM Authentication on the Printer Spooler Service
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About the rule
Rule Type
Standard
Rule Description
Detects a privilege elevation attempt by coercing NTLM authentication on the Printer Spooler service
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (PROCESSNAME endswith "\rundll32.exe" OR ORIGINALFILENAME = "RUNDLL32.EXE") AND ((COMMANDLINE contains "C:\windows\system32\davclnt.dll,DavSetCookie" AND COMMANDLINE contains "http") AND COMMANDLINE contains "spoolss,srvsvc,/print/pipe/") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Elastic (idea), Tobias Michalski (Nextron Systems)
