From 7b815ef3e511de0b63b3e557ac4dd07bbc4d86a6 Mon Sep 17 00:00:00 2001
From: Florian Roth <florian.roth@bsk-consulting.de>
Date: Sun, 5 Mar 2017 23:51:39 +0100
Subject: [PATCH] Sysmon PowerShell - Suspicious Param Combination

---
 ...n_powershell_suspicious_parameter_combo.yml | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 rules/windows/sysmon/sysmon_powershell_suspicious_parameter_combo.yml

diff --git a/rules/windows/sysmon/sysmon_powershell_suspicious_parameter_combo.yml b/rules/windows/sysmon/sysmon_powershell_suspicious_parameter_combo.yml
new file mode 100644
index 000000000..c9466ed7b
--- /dev/null
+++ b/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