Sigma rule: HackTool - Mimikatz Kirbi File Creation

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-b81c7dd76515, updated 2024-06-27T00:00:00.000Z.

Rule

Title
HackTool - Mimikatz Kirbi File Creation
Status
test
Level
critical
Author
Florian Roth (Nextron Systems), David ANDRE
Date
2021-11-08
Modified
2024-06-27
File
rules/windows/file/file_event/file_event_win_hktl_mimikatz_files.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the creation of files created by mimikatz such as ".kirbi", "mimilsa.log", etc.

Log source

product
windows
category
file_event

Detection

selection:
    TargetFilename|endswith:
        - '.kirbi' # Kerberos tickets
        - 'mimilsa.log' # MemSSP default file
condition: selection

False positives (as the rule lists them)

  • Unlikely

Tags

  • attack.credential-access
  • attack.t1558

MITRE ATT&CK ids this rule names

Related rules

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/file/file_event/file_event_win_hktl_mimikatz_files.yml

Sources and licences

  • SigmaHQ

    "HackTool - Mimikatz Kirbi File Creation" by Florian Roth (Nextron Systems), David ANDRE (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_event/file_event_win_hktl_mimikatz_files.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: HackTool - Mimikatz Kirbi File Creation",
entity page, dataset version ref-b81c7dd76515, updated 2024-06-27T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/9e099d99-44c2-42b6-a6d8-54c3545cab29 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 9e099d99-44c2-42b6-a6d8-54c3545cab29, 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.