rule: suspicious keyboard layout load

2019-10-14 16:25:27 +02:00
parent 5583684efd
commit 7ee3974428
1 changed files with 22 additions and 0 deletions
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+title: Suspicious Keyboard Layout Load
+description: Detects the keyboard preload installation with a suspicious keyboard layout, e.g. Chinese, Iranian or Vietnamese layout load in user session on systems maintained by US staff only
+references:
+    - https://renenyffenegger.ch/notes/Windows/registry/tree/HKEY_CURRENT_USER/Keyboard-Layout/Preload/index
+author: Florian Roth
+date: 2019/10/12
+logsource:
+    product: windows
+    service: sysmon
+    definition: 'Requirements: Sysmon config that monitors \Keyboard Layout\Preload subkey of the HKLU hives - see https://github.com/SwiftOnSecurity/sysmon-config/pull/92/files'
+detection:
+    selection_registry:
+        EventID: 13
+        TargetObject: '*\Keyboard Layout\Preload\*'
+        Details: 
+            - 00000429  # Persian (Iran)
+            - 00050429  # Persian (Iran)
+            - 0000042a  # Vietnamese
+    condition: selection_registry
+falsepositives:
+    - "Administrators or users that actually use the selected keyboard layouts (heavily depends on the organisation's user base)"
+level: medium