Sigma rule: CrackMapExec File Creation Patterns

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-0499a384a752, updated 2024-03-01T00:00:00.000Z.

SigmaHQ marks this rule as deprecated.

Rule

Title
CrackMapExec File Creation Patterns
Status
deprecated
Level
high
Author
Florian Roth (Nextron Systems)
Date
2022/03/12
Modified
2024/03/01
File
deprecated/windows/file_event_win_crackmapexec_patterns.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects suspicious file creation patterns found in logs when CrackMapExec is used

Log source

product
windows
category
file_event

Detection

selection_lsass_dump1:
    TargetFilename|startswith: 'C:\Windows\Temp\'
    Image: 'C:\WINDOWS\system32\rundll32.exe'
    User|contains: # covers many language settings
        - 'AUTHORI'
        - 'AUTORI'
    TargetFilename|endswith:
        - '.rtf'
        - '.otf'
        - '.odt'
        - '.txt'
        - '.doc'
        - '.pdf'
        - '.dll'
        - '.docx'
        - '.wpd'
        - '.icns'
        - '.db'
        - '.ini'
        - '.tex'
        - '.sys'
        - '.csv'
        - '.fon'
        - '.tar'
        - '.ttf'
        - '.xml'
        - '.cfg'
        - '.cpl'
        - '.jpg'
        - '.drv'
        - '.cur'
        - '.tmp'
        # list is incomplete
selection_procdump:
    TargetFilename: 'C:\Windows\Temp\procdump.exe'
    User|contains: # covers many language settings
        - 'AUTHORI'
        - 'AUTORI'
condition: 1 of selection*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.credential_access
  • attack.t1003.001

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/deprecated/windows/file_event_win_crackmapexec_patterns.yml

Sources and licences

  • SigmaHQ

    "CrackMapExec File Creation Patterns" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/deprecated/windows/file_event_win_crackmapexec_patterns.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: CrackMapExec File Creation Patterns",
entity page, dataset version ref-0499a384a752, updated 2024-03-01T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/9433ff9c-5d3f-4269-99f8-95fc826ea489 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 9433ff9c-5d3f-4269-99f8-95fc826ea489, 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.