Sigma rule: Wannacry Killswitch Domain

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-8f657f7c42b5, updated 2022-03-24T00:00:00.000Z.

Rule

Title
Wannacry Killswitch Domain
Status
test
Level
high
Author
Mike Wade
Date
2020-09-16
Modified
2022-03-24
File
rules/network/dns/net_dns_wannacry_killswitch_domain.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects wannacry killswitch domain dns queries

Log source

category
dns

Detection

selection:
    query:
        - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.testing'
        - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.test'
        - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.com'
        - 'ayylmaotjhsstasdfasdfasdfasdfasdfasdfasdf.com'
        - 'iuqssfsodp9ifjaposdfjhgosurijfaewrwergwea.com'
condition: selection

False positives (as the rule lists them)

  • Analyst testing

Tags

  • attack.command-and-control
  • attack.t1071.001

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/network/dns/net_dns_wannacry_killswitch_domain.yml

Sources and licences

  • SigmaHQ

    "Wannacry Killswitch Domain" by Mike Wade (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/network/dns/net_dns_wannacry_killswitch_domain.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: Wannacry Killswitch Domain",
entity page, dataset version ref-8f657f7c42b5, updated 2022-03-24T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/3eaf6218-3bed-4d8a-8707-274096f12a18 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 3eaf6218-3bed-4d8a-8707-274096f12a18, 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.