Azure Firewall Rule Configuration Modified or Deleted

Identifies when a Firewall Rule Configuration is Modified or Deleted.

Sigma rule (View on GitHub)

 1title: Azure Firewall Rule Configuration Modified or Deleted
 2id: 2a7d64cf-81fa-4daf-ab1b-ab80b789c067
 3status: test
 4description: Identifies when a Firewall Rule Configuration is Modified or Deleted.
 5references:
 6    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
 7author: Austin Songer @austinsonger
 8date: 2021/08/08
 9modified: 2022/08/23
10tags:
11    - attack.impact
12logsource:
13    product: azure
14    service: activitylogs
15detection:
16    selection:
17        operationName:
18            - MICROSOFT.NETWORK/FIREWALLPOLICIES/RULECOLLECTIONGROUPS/WRITE
19            - MICROSOFT.NETWORK/FIREWALLPOLICIES/RULECOLLECTIONGROUPS/DELETE
20            - MICROSOFT.NETWORK/FIREWALLPOLICIES/RULEGROUPS/WRITE
21            - MICROSOFT.NETWORK/FIREWALLPOLICIES/RULEGROUPS/DELETE
22    condition: selection
23falsepositives:
24    - 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.
25    - 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.
26level: medium

References

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