Sigma rule: Disabled Windows Defender Eventlog

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-f41db7681197, updated 2023-08-17T00:00:00.000Z.

Rule

Title
Disabled Windows Defender Eventlog
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2022-07-04
Modified
2023-08-17
File
rules/windows/registry/registry_set/registry_set_disabled_microsoft_defender_eventlog.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the disabling of the Windows Defender eventlog as seen in relation to Lockbit 3.0 infections

Log source

product
windows
category
registry_set

Detection

selection:
    TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Windows Defender/Operational\Enabled'
    Details: 'DWORD (0x00000000)'
condition: selection

False positives (as the rule lists them)

  • Other Antivirus software installations could cause Windows to disable that eventlog (unknown)

Tags

  • attack.defense-impairment
  • attack.t1685

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/windows/registry/registry_set/registry_set_disabled_microsoft_defender_eventlog.yml

Sources and licences

  • SigmaHQ

    "Disabled Windows Defender Eventlog" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_disabled_microsoft_defender_eventlog.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: Disabled Windows Defender Eventlog",
entity page, dataset version ref-f41db7681197, updated 2023-08-17T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/fcddca7c-b9c0-4ddf-98da-e1e2d18b0157 (accessed 2026-11-03).
Underlying source: SigmaHQ rule fcddca7c-b9c0-4ddf-98da-e1e2d18b0157, 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.