Detectionhightest
Suspicious NTLM Authentication on the Printer Spooler Service
Detects a privilege elevation attempt by coercing NTLM authentication on the Printer Spooler service
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Elastic Security, Tobias MichalskiCreated Wed May 04Updated Thu Feb 09bb76d96b-821c-47cf-944b-7ce377864492windows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic2 selectors
detection:
selection_img:
- Image|endswith: '\rundll32.exe'
- OriginalFileName: 'RUNDLL32.EXE'
selection_cli:
CommandLine|contains|all:
- 'C:\windows\system32\davclnt.dll,DavSetCookie'
- 'http'
CommandLine|contains:
- 'spoolss'
- 'srvsvc'
- '/print/pipe/'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Rule Metadata
Rule ID
bb76d96b-821c-47cf-944b-7ce377864492
Status
test
Level
high
Type
Detection
Created
Wed May 04
Modified
Thu Feb 09
Author
Path
rules/windows/process_creation/proc_creation_win_rundll32_ntlmrelay.yml
Raw Tags
attack.privilege-escalationattack.credential-accessattack.t1212