Azure Firewall Modified or Deleted

Description

Identifies when a firewall is created, modified, or deleted.

Query · sigma

selection:
  operationName:
  - MICROSOFT.NETWORK/AZUREFIREWALLS/WRITE
  - MICROSOFT.NETWORK/AZUREFIREWALLS/DELETE
condition: selection

Known false positives

  • Firewall 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 modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
Raw source Azure Firewall Modified or Deleted · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Azure Firewall Modified or Deleted
id: 512cf937-ea9b-4332-939c-4c2c94baadcd
status: test
description: Identifies when a firewall is created, modified, or deleted.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
author: Austin Songer @austinsonger
date: 2021-08-08
modified: 2022-08-23
tags:
    - attack.impact
    - attack.defense-impairment
    - attack.t1686.001
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName:
            - MICROSOFT.NETWORK/AZUREFIREWALLS/WRITE
            - MICROSOFT.NETWORK/AZUREFIREWALLS/DELETE
    condition: selection
falsepositives:
    - Firewall 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 modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
level: medium

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