From 7949729fa44b1c11f1c5fb3b079fba474147f862 Mon Sep 17 00:00:00 2001
From: Florian Roth <venom14@gmail.com>
Date: Thu, 9 Jul 2020 08:52:32 +0200
Subject: [PATCH] rule: PowerShell encoded character syntax

---
 .../win_susp_powershell_encoded_param.yml     | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 rules/windows/process_creation/win_susp_powershell_encoded_param.yml

diff --git a/rules/windows/process_creation/win_susp_powershell_encoded_param.yml b/rules/windows/process_creation/win_susp_powershell_encoded_param.yml
new file mode 100644
index 000000000..04c975d1a
--- /dev/null
+++ b/rules/windows/process_creation/win_susp_powershell_encoded_param.yml
@@ -0,0 +1,24 @@
+title: PowerShell Encoded Character Syntax
+id: e312efd0-35a1-407f-8439-b8d434b438a6
+status: experimental
+description: Detects suspicious encoded character syntax often used for defense evasion
+references:
+    - https://twitter.com/0gtweet/status/1281103918693482496
+tags:
+    - attack.execution
+    - attack.defense_evasion
+    - attack.t1027
+    - attack.t1086
+    - attack.t1059.001
+author: Florian Roth
+date: 2020/07/09
+logsource:
+    category: process_creation
+    product: windows
+detection:
+    selection:
+        CommandLine: '(WCHAR)0x'
+    condition: selection
+falsepositives:
+    - Unknown
+level: high