Suspicious Azure Network Firewall Policy Modified or Deleted (via activitylogs)

title: Suspicious Azure Network Firewall Policy Modified or Deleted (via activitylogs)
id: 81d2f1b4-e9c1-54e1-be94-ff1237eb6c10
status: stable
description: This rule detects when a Firewall Policy is Modified or Deleted.
references:
    - https://attack.mitre.org/techniques/T1686/001/
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
author: Huntrule Team
date: 2026-05-24
tags:
    - attack.impact
    - attack.defense-impairment
    - attack.t1686.001
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName:
            - MICROSOFT.NETWORK/FIREWALLPOLICIES/WRITE
            - MICROSOFT.NETWORK/FIREWALLPOLICIES/JOIN/ACTION
            - MICROSOFT.NETWORK/FIREWALLPOLICIES/CERTIFICATES/ACTION
            - MICROSOFT.NETWORK/FIREWALLPOLICIES/DELETE
    condition: selection
falsepositives:
    - Unknown
level: medium