Sigma rule: Antivirus - Ransomware Signature

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-50a0aaaf5436, updated 2026-06-15T00:00:00.000Z.

Rule

Title: Antivirus - Ransomware Signature
Status: test
Level: critical
Author: Florian Roth (Nextron Systems), Arnim Rupp
Date: 2022-05-12
Modified: 2026-06-15
File: rules/category/antivirus/av_ransomware.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a highly relevant Antivirus alert that reports ransomware.
This event must not be ignored just because the AV has blocked the malware but investigate, how it came there in the first place.

Log source

category: antivirus

Detection

selection:
    Signature|contains:
        - 'Babuk'
        - 'Babyk'
        - 'BlackWorm'
        - 'Chaos'
        - 'Cobra'
        - 'ContiCrypt'
        - 'Crypter'
        - 'Cryptes'
        - 'Cryptor'
        - 'CylanCrypt'
        - 'DelShad'
        - 'Destructor'
        - 'Filecoder'
        - 'GandCrab'
        - 'GrandCrab'
        - 'Haperlock'
        - 'Hiddentear'
        - 'HydraCrypt'
        - 'Krypt'
        - 'Lockbit'
        - 'Locker'
        - 'Mallox'
        - 'Medusa'
        - 'Phobos'
        - 'Ransom'
        - 'Rook'
        - 'Ryuk'
        - 'Ryzerlo'
        - 'Stopcrypt'
        - 'Tescrypt'
        - 'TeslaCrypt'
        - 'WannaCry'
        - 'Xorist'
condition: selection

False positives (as the rule lists them)

Unlikely

MITRE ATT&CK ids this rule names

T1486

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/category/antivirus/av_ransomware.yml

Sources and licences

SigmaHQ
"Antivirus - Ransomware Signature" by Florian Roth (Nextron Systems), Arnim Rupp (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/category/antivirus/av_ransomware.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: Antivirus - Ransomware Signature",
entity page, dataset version ref-50a0aaaf5436, updated 2026-06-15T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/4c6ca276-d4d0-4a8c-9e4c-d69832f8671f (accessed 2026-11-03).
Underlying source: SigmaHQ rule 4c6ca276-d4d0-4a8c-9e4c-d69832f8671f, 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.