Sigma rule: Azure Firewall Rule Configuration Modified or Deleted

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-fb217125e129, updated 2022-08-23T00:00:00.000Z.

Rule

Title
Azure Firewall Rule Configuration Modified or Deleted
Status
test
Level
medium
Author
Austin Songer @austinsonger
Date
2021-08-08
Modified
2022-08-23
File
rules/cloud/azure/activity_logs/azure_network_firewall_rule_modified_or_deleted.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Identifies when a Firewall Rule Configuration is Modified or Deleted.

Log source

product
azure
service
activitylogs

Detection

selection:
    operationName:
        - MICROSOFT.NETWORK/FIREWALLPOLICIES/RULECOLLECTIONGROUPS/WRITE
        - MICROSOFT.NETWORK/FIREWALLPOLICIES/RULECOLLECTIONGROUPS/DELETE
        - MICROSOFT.NETWORK/FIREWALLPOLICIES/RULEGROUPS/WRITE
        - MICROSOFT.NETWORK/FIREWALLPOLICIES/RULEGROUPS/DELETE
condition: selection

False positives (as the rule lists them)

  • Firewall Rule Configuration being modified or deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
  • Firewall Rule Configuration modified or deleted 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_network_firewall_rule_modified_or_deleted.yml

Sources and licences

  • SigmaHQ

    "Azure Firewall Rule Configuration Modified or Deleted" by Austin Songer @austinsonger (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/azure/activity_logs/azure_network_firewall_rule_modified_or_deleted.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 Firewall Rule Configuration Modified or Deleted",
entity page, dataset version ref-fb217125e129, updated 2022-08-23T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/2a7d64cf-81fa-4daf-ab1b-ab80b789c067 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 2a7d64cf-81fa-4daf-ab1b-ab80b789c067, 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.