Sigma rule: Ryuk Ransomware Command Line Activity

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-0dadf232cac9, updated 2023-02-03T00:00:00.000Z.

SigmaHQ marks this rule as deprecated.

Rule

Title
Ryuk Ransomware Command Line Activity
Status
deprecated
Level
critical
Author
Vasiliy Burov
Date
2019/08/06
Modified
2023/02/03
File
deprecated/windows/proc_creation_win_mal_ryuk.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects Ryuk Ransomware command lines

Log source

product
windows
category
process_creation

Detection

selection1:
    Image|endswith:
        - '\net.exe'
        - '\net1.exe'
    CommandLine|contains: 'stop'
selection2:
    CommandLine|contains:
        - 'samss'
        - 'audioendpointbuilder'
        - 'unistoresvc_'
condition: all of selection*

False positives (as the rule lists them)

  • Unlikely

Tags

  • attack.execution
  • attack.t1204

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/deprecated/windows/proc_creation_win_mal_ryuk.yml

Sources and licences

  • SigmaHQ

    "Ryuk Ransomware Command Line Activity" by Vasiliy Burov (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/deprecated/windows/proc_creation_win_mal_ryuk.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: Ryuk Ransomware Command Line Activity",
entity page, dataset version ref-0dadf232cac9, updated 2023-02-03T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/0acaad27-9f02-4136-a243-c357202edd74 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 0acaad27-9f02-4136-a243-c357202edd74, 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.