Sigma rule: Blackbyte Ransomware Registry

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-8d16c63a5819, updated 2025-10-21T00:00:00.000Z.

Rule

Title
Blackbyte Ransomware Registry
Status
test
Level
high
Author
frack113
Date
2022-01-24
Modified
2025-10-21
File
rules-emerging-threats/2021/Malware/BlackByte/registry_set_win_malware_blackbyte_privesc_registry.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects specific windows registry modifications made by BlackByte ransomware variants.
BlackByte set three different registry values to escalate privileges and begin setting the stage for lateral movement and encryption.
This rule triggers when any of the following registry keys are set to DWORD 1, however all three should be investigated as part of a larger BlackByte ransomware detection and response effort.

Log source

product
windows
category
registry_set

Detection

selection:
    TargetObject:
        - 'HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\LocalAccountTokenFilterPolicy'
        - 'HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections'
        - 'HKLM\SYSTEM\CurrentControlSet\Control\FileSystem\LongPathsEnabled'
    Details: 'DWORD (0x00000001)'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.persistence
  • attack.defense-impairment
  • attack.t1112
  • detection.emerging-threats

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-emerging-threats/2021/Malware/BlackByte/registry_set_win_malware_blackbyte_privesc_registry.yml

Sources and licences

  • SigmaHQ

    "Blackbyte Ransomware Registry" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Malware/BlackByte/registry_set_win_malware_blackbyte_privesc_registry.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: Blackbyte Ransomware Registry",
entity page, dataset version ref-8d16c63a5819, updated 2025-10-21T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/83314318-052a-4c90-a1ad-660ece38d276 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 83314318-052a-4c90-a1ad-660ece38d276, 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.