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HighSigmaHQ ok @securonix invrep-de +2

Disable Windows Defender AV Security Monitoring

Detects attackers attempting to disable Windows Defender using Powershell

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 category: process_creation

Known benign triggers

Minimal, for some older versions of dev tools, such as pycharm, developers were known to sometimes disable Windows Defender to improve performance, but this generally is not considered a good security practice.

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
github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.001/T1562.001.md	Detection test	21
research.nccgroup.com/2020/06/23/wastedlocker-a-new-ransomware-variant-developed-by-the-evil-corp-group/	Unclassified	2from 2 sources
rvsec0n.wordpress.com/2020/01/24/malwares-that-bypass-windows-defender/	Unclassified	Only this detection cites it

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