Sigma rule: Windows Defender Grace Period Expired
A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-c5b2feb5bf2d, updated 2023-11-22T00:00:00.000Z.
Rule
- Title
- Windows Defender Grace Period Expired
- Status
- stable
- Level
- high
- Author
- Ján Trenčanský, frack113
- Date
- 2020-07-28
- Modified
- 2023-11-22
- File
- rules/windows/builtin/windefend/win_defender_antimalware_platform_expired.yml
- Commit
- ccbb0369507f796db0b0ae6854c8a2be471b9d84
Detects the expiration of the grace period of Windows Defender. This means protection against viruses, spyware, and other potentially unwanted software is disabled.
Log source
- product
- windows
- service
- windefend
Detection
selection:
EventID: 5101 # The antimalware platform is expired.
condition: selectionFalse positives (as the rule lists them)
- Unknown
Tags
- attack.defense-impairment
- attack.t1685
MITRE ATT&CK ids this rule names
Related rules
References
- https://learn.microsoft.com/en-us/defender-endpoint/troubleshoot-microsoft-defender-antivirus?view=o365-worldwide#event-id-5101
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.001/T1562.001.md
- https://craigclouditpro.wordpress.com/2020/03/04/hunting-malicious-windows-defender-activity/
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/builtin/windefend/win_defender_antimalware_platform_expired.yml
Sources and licences
SigmaHQ
"Windows Defender Grace Period Expired" by Ján Trenčanský, frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/windefend/win_defender_antimalware_platform_expired.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Cite this page
Dragons Eye Ransomware Tracker, "Sigma rule: Windows Defender Grace Period Expired",
entity page, dataset version ref-c5b2feb5bf2d, updated 2023-11-22T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/360a1340-398a-46b6-8d06-99b905dc69d2 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 360a1340-398a-46b6-8d06-99b905dc69d2, 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.