Sigma rule: Windows Defender AMSI Trigger Detected

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-b9c7dd4817c4, updated 2022-12-07T00:00:00.000Z.

Rule

Title
Windows Defender AMSI Trigger Detected
Status
stable
Level
high
Author
Bhabesh Raj
Date
2020-09-14
Modified
2022-12-07
File
rules/windows/builtin/windefend/win_defender_malware_detected_amsi_source.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects triggering of AMSI by Windows Defender.

Log source

product
windows
service
windefend

Detection

selection:
    EventID: 1116 # The antimalware platform detected malware or other potentially unwanted software.
    SourceName: 'AMSI'
condition: selection

False positives (as the rule lists them)

  • Unlikely

Tags

  • attack.execution
  • attack.t1059

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/builtin/windefend/win_defender_malware_detected_amsi_source.yml

Sources and licences

  • SigmaHQ

    "Windows Defender AMSI Trigger Detected" by Bhabesh Raj (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/windefend/win_defender_malware_detected_amsi_source.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: Windows Defender AMSI Trigger Detected",
entity page, dataset version ref-b9c7dd4817c4, updated 2022-12-07T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/ea9bf0fa-edec-4fb8-8b78-b119f2528186 (accessed 2026-11-03).
Underlying source: SigmaHQ rule ea9bf0fa-edec-4fb8-8b78-b119f2528186, 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.