Sigma rule: NTLM Logon

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-61c27bc4850e, updated 2024-07-22T00:00:00.000Z.

Rule

Title
NTLM Logon
Status
test
Level
low
Author
Florian Roth (Nextron Systems)
Date
2018-06-08
Modified
2024-07-22
File
rules/windows/builtin/ntlm/win_susp_ntlm_auth.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects logons using NTLM, which could be caused by a legacy source or attackers

Log source

product
windows
service
ntlm
definition
Requires events from Microsoft-Windows-NTLM/Operational

Detection

selection:
    EventID: 8002
condition: selection

False positives (as the rule lists them)

  • Legacy hosts

Tags

  • attack.lateral-movement
  • attack.t1550.002

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/ntlm/win_susp_ntlm_auth.yml

Sources and licences

  • SigmaHQ

    "NTLM Logon" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/ntlm/win_susp_ntlm_auth.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: NTLM Logon",
entity page, dataset version ref-61c27bc4850e, updated 2024-07-22T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/98c3bcf1-56f2-49dc-9d8d-c66cf190238b (accessed 2026-11-03).
Underlying source: SigmaHQ rule 98c3bcf1-56f2-49dc-9d8d-c66cf190238b, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.