Merge pull request #322 from P4T12ICK/feature/win_user_creation

New Sigma rule detecting local user creation

rules/windows/builtin/win_user_creation.yml

@@ -0,0 +1,25 @@
+title: Detects local user creation
+description: Detects local user creation on windows servers, which shouldn't happen in an Active Directory environment. Apply this Sigma Use Case on your windows server logs and not on your DC logs. 
+status: experimental
+tags:
+    - attack.persistence
+    - attack.t1136
+references:
+    - https://patrick-bareiss.com/detecting-local-user-creation-in-ad-with-sigma/ 
+author: Patrick Bareiss
+logsource:
+    product: windows
+    service: security
+detection:
+    selection:
+        EventID: 4720
+    condition: selection
+fields:
+    - EventCode
+    - Account_Name
+    - Account_Domain
+falsepositives: 
+    - Domain Controller Logs
+level: high
+
+