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Detectionmediumtest

Azure Firewall Rule Collection Modified or Deleted

Identifies when Rule Collections (Application, NAT, and Network) is being modified or deleted.

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Austin SongerCreated Sun Aug 08Updated Tue Aug 23025c9fe7-db72-49f9-af0d-31341dd7dd57cloud
Log Source
Azureactivitylogs
ProductAzure← raw: azure
Serviceactivitylogs← raw: activitylogs
Detection Logic
Detection Logic1 selector
detection:
    selection:
        operationName:
            - MICROSOFT.NETWORK/AZUREFIREWALLS/APPLICATIONRULECOLLECTIONS/WRITE
            - MICROSOFT.NETWORK/AZUREFIREWALLS/APPLICATIONRULECOLLECTIONS/DELETE
            - MICROSOFT.NETWORK/AZUREFIREWALLS/NATRULECOLLECTIONS/WRITE
            - MICROSOFT.NETWORK/AZUREFIREWALLS/NATRULECOLLECTIONS/DELETE
            - MICROSOFT.NETWORK/AZUREFIREWALLS/NETWORKRULECOLLECTIONS/WRITE
            - MICROSOFT.NETWORK/AZUREFIREWALLS/NETWORKRULECOLLECTIONS/DELETE
    condition: selection
False Positives

Rule Collections (Application, NAT, and Network) 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.

Rule Collections (Application, NAT, and Network) modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

References
1
Resolving title…
learn.microsoft.com
MITRE ATT&CK
Rule Metadata
Rule ID
025c9fe7-db72-49f9-af0d-31341dd7dd57
Status
test
Level
medium
Type
Detection
Created
Sun Aug 08
Modified
Tue Aug 23
Author
Austin Songer
Path
rules/cloud/azure/activity_logs/azure_firewall_rule_collection_modified_or_deleted.yml
Raw Tags
attack.impactattack.defense-evasionattack.t1562.004
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