From dc33f131f13203d64ebe1f73f9c63147336b3eff Mon Sep 17 00:00:00 2001
From: Austin Songer <austin@songer.pro>
Date: Sun, 8 Aug 2021 22:42:51 -0500
Subject: [PATCH] Create azure_firewall_modified_or_deleted.yml

---
 .../azure_firewall_modified_or_deleted.yml    | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 rules/cloud/azure_firewall_modified_or_deleted.yml

diff --git a/rules/cloud/azure_firewall_modified_or_deleted.yml b/rules/cloud/azure_firewall_modified_or_deleted.yml
new file mode 100644
index 000000000..d37781a6e
--- /dev/null
+++ b/rules/cloud/azure_firewall_modified_or_deleted.yml
@@ -0,0 +1,22 @@
+title: Azure Firewall Modified or Deleted
+id: 512cf937-ea9b-4332-939c-4c2c94baadcd
+description: Identifies when a firewall is created, modified, or deleted.
+author: Austin Songer
+status: experimental
+date: 2021/08/08
+references:
+    - https://docs.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
+logsource:
+  service: azure.activitylogs
+detection:
+    selection:
+        properties.message: 
+            - MICROSOFT.NETWORK/AZUREFIREWALLS/WRITE
+            - MICROSOFT.NETWORK/AZUREFIREWALLS/DELETE
+    condition: selection
+level: medium
+tags:
+    - attack.impact
+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.