Sigma rule: Blue Mockingbird - Registry

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-76404dd96b42, updated 2023-08-17T00:00:00.000Z.

Rule

Title
Blue Mockingbird - Registry
Status
test
Level
high
Author
Trent Liffick (@tliffick)
Date
2020-05-14
Modified
2023-08-17
File
rules-emerging-threats/2020/Malware/Blue-Mockingbird/registry_set_mal_blue_mockingbird.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Attempts to detect system changes made by Blue Mockingbird

Log source

product
windows
category
registry_set

Detection

selection:
    TargetObject|endswith: '\CurrentControlSet\Services\wercplsupport\Parameters\ServiceDll'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.persistence
  • attack.defense-impairment
  • attack.t1112
  • attack.t1047
  • detection.emerging-threats

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/rules-emerging-threats/2020/Malware/Blue-Mockingbird/registry_set_mal_blue_mockingbird.yml

Sources and licences

  • SigmaHQ

    "Blue Mockingbird - Registry" by Trent Liffick (@tliffick) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2020/Malware/Blue-Mockingbird/registry_set_mal_blue_mockingbird.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: Blue Mockingbird - Registry",
entity page, dataset version ref-76404dd96b42, updated 2023-08-17T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/92b0b372-a939-44ed-a11b-5136cf680e27 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 92b0b372-a939-44ed-a11b-5136cf680e27, 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.