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HighSigmaHQ Ján Trenčanský +1

Windows Defender Grace Period Expired

Detects the expiration of the grace period of Windows Defender. This means protection against viruses, spyware, and other potentially unwanted software is disabled.

Detection logic

Detection requirements

Platform: Containers ESXi IaaS Linux macOS Network Devices Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: windows
Log source service: windefend

Known benign triggers

Unknown

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
craigclouditpro.wordpress.com/2020/03/04/hunting-malicious-windows-defender-activity/	Unclassified	4
github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.001/T1562.001.md	Detection test	21
learn.microsoft.com/en-us/defender-endpoint/troubleshoot-microsoft-defender-antivirus?view=o365-worldwide#event-id-5101	Product documentation	8

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