Create powershell_invoke_obfuscation_clip+.yml

rules/windows/powershell/powershell_invoke_obfuscation_clip+.yml

@@ -0,0 +1,29 @@
+title: Invoke-Obfuscation CLIP+ Launcher
+id: 73e67340-0d25-11eb-adc1-0242ac120002
+description: Detects Obfuscated use of Clip.exe to execute PowerShell
+status: experimental
+author: Jonathan Cheong, oscd.community
+date: 2020/10/13
+references:
+     - https://github.com/Neo23x0/sigma/issues/1009 #(Task 26)
+tags:
+    - attack.defense_evasion
+    - attack.t1027
+    - attack.execution
+    - attack.t1059.001
+logsource:
+    product: windows
+    service: powershell
+detection:
+    selection_1:
+        EventID: 4104
+    selection_2:
+        - ScriptBlockText|re: '.+clip(.exe|)(\s|)&&.*clipboard]::\(\s\\\"\{\d\}.+'
+    selection_3:
+        EventID: 4103
+    selection_4:
+        - Payload|re: '.+clip(.exe|)(\s|)&&.*clipboard]::\(\s\\\"\{\d\}.+'
+    condition: ( selection_1 and selection_2 ) or ( selection_3 and selection_4 )
+falsepositives:
+    - Unknown
+level: high