Sysmon PowerShell - Suspicious Param Combination

rules/windows/sysmon/sysmon_powershell_suspicious_parameter_combo.yml

@@ -0,0 +1,18 @@
+title: Suspicious PowerShell Parameter Combination
+status: experimental
+description: Detects suspicious PowerShell invocation command parameters
+author: Florian Roth
+logsource:
+    product: sysmon
+detection:
+    keywords:
+        - 'powershell'
+        - ' -nop '
+        - ' -w hidden '
+        - ' -exec bypass '
+        - ' -enc ' 
+    condition: all of keywords
+falsepositives:
+    - Penetration tests
+    - Very special / sneaky PowerShell scripts
+level: high