Sigma rule: Azure Suppression Rule Created

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-3e62c77ef66d, updated 2022-08-23T00:00:00.000Z.

Rule

Title
Azure Suppression Rule Created
Status
test
Level
medium
Author
Austin Songer
Date
2021-08-16
Modified
2022-08-23
File
rules/cloud/azure/activity_logs/azure_suppression_rule_created.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Identifies when a suppression rule is created in Azure. Adversary's could attempt this to evade detection.

Log source

product
azure
service
activitylogs

Detection

selection:
    operationName: MICROSOFT.SECURITY/ALERTSSUPPRESSIONRULES/WRITE
condition: selection

False positives (as the rule lists them)

  • Suppression Rule being created may be performed by a system administrator.
  • Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
  • Suppression Rule created from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Tags

  • attack.impact

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/cloud/azure/activity_logs/azure_suppression_rule_created.yml

Sources and licences

  • SigmaHQ

    "Azure Suppression Rule Created" by Austin Songer (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/azure/activity_logs/azure_suppression_rule_created.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: Azure Suppression Rule Created",
entity page, dataset version ref-3e62c77ef66d, updated 2022-08-23T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/92cc3e5d-eb57-419d-8c16-5c63f325a401 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 92cc3e5d-eb57-419d-8c16-5c63f325a401, 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.