Sigma rule: PUA - Crassus Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-af33cccf65b6, updated 2023-04-17T00:00:00.000Z.

Rule

Title
PUA - Crassus Execution
Status
test
Level
high
Author
pH-T (Nextron Systems)
Date
2023-04-17
File
rules/windows/process_creation/proc_creation_win_pua_crassus.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects Crassus, a Windows privilege escalation discovery tool, based on PE metadata characteristics.

Log source

product
windows
category
process_creation

Detection

selection:
    - Image|endswith: '\Crassus.exe'
    - OriginalFileName: 'Crassus.exe'
    - Description|contains: 'Crassus'
condition: selection

False positives (as the rule lists them)

  • Unlikely

Tags

  • attack.discovery
  • attack.reconnaissance
  • attack.t1590.001

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/rules/windows/process_creation/proc_creation_win_pua_crassus.yml

Sources and licences

  • SigmaHQ

    "PUA - Crassus Execution" by pH-T (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_pua_crassus.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: PUA - Crassus Execution",
entity page, dataset version ref-af33cccf65b6, updated 2023-04-17T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/2c32b543-1058-4808-91c6-5b31b8bed6c5 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 2c32b543-1058-4808-91c6-5b31b8bed6c5, 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.