Create azure_dns_zone_modified_or_deleted.yml

2021-08-08 22:42:08 -05:00
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+title: Azure DNS Zone Modified or Deleted
+id: af6925b0-8826-47f1-9324-337507a0babd
+description: Identifies when DNS zone is modified or deleted.
+author: Austin Songer
+status: experimental
+date: 2021/08/07
+references:
+    - https://docs.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes
+logsource:
+  service: azure.activitylogs
+detection:
+    selection:
+        properties.message: 
+            - MICROSOFT.NETWORK/DNSZONES/WRITE
+            - MICROSOFT.NETWORK/DNSZONES/DELETE	
+            - MICROSOFT.NETWORK/DNSZONES/A/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/A/DELETE	
+            - MICROSOFT.NETWORK/DNSZONES/AAAA/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/AAAA/DELETE	
+            - MICROSOFT.NETWORK/DNSZONES/CAA/READ	
+            - MICROSOFT.NETWORK/DNSZONES/CAA/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/CAA/DELETE	
+            - MICROSOFT.NETWORK/DNSZONES/CNAME/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/CNAME/DELETE	
+            - MICROSOFT.NETWORK/DNSZONES/MX/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/MX/DELETE
+            - MICROSOFT.NETWORK/DNSZONES/NS/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/NS/DELETE
+            - MICROSOFT.NETWORK/DNSZONES/PTR/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/PTR/DELETE	
+            - MICROSOFT.NETWORK/DNSZONES/SOA/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/SRV/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/SRV/DELETE	
+            - MICROSOFT.NETWORK/DNSZONES/TXT/WRITE	
+            - MICROSOFT.NETWORK/DNSZONES/TXT/DELETE	
+    condition: selection
+level: medium
+tags:
+    - attack.impact
+    - attack.credential_access
+falsepositives:
+ - DNS zone modified and 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. 
+ - DNS zone modification from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.