From e7c6794ecd6cfd9bd5c96ffabc2ec9a1f3093726 Mon Sep 17 00:00:00 2001
From: Florian Roth <florian.roth@nextron-systems.com>
Date: Mon, 12 Oct 2020 09:18:30 +0200
Subject: [PATCH] rule: suspicious wmic process call create + rundll32

---
 .../win_susp_wmic_proc_create_rundll32.yml    | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 rules/windows/process_creation/win_susp_wmic_proc_create_rundll32.yml

diff --git a/rules/windows/process_creation/win_susp_wmic_proc_create_rundll32.yml b/rules/windows/process_creation/win_susp_wmic_proc_create_rundll32.yml
new file mode 100644
index 00000000000..72ee04d1a89
--- /dev/null
+++ b/rules/windows/process_creation/win_susp_wmic_proc_create_rundll32.yml
@@ -0,0 +1,26 @@
+title: Suspicious WMI Execution using Rundll32
+id: 3c89a1e8-0fba-449e-8f1b-8409d6267ec8
+status: experimental
+description: Detects WMI executing rundll32
+references:
+    - https://thedfirreport.com/2020/10/08/ryuks-return/
+author: Florian Roth
+date: 2020/10/12
+logsource:
+    category: process_creation
+    product: windows
+detection:
+    selection:
+        CommandLine|contains|all:
+            - 'process call create'
+            - 'rundll32'
+    condition: selection
+fields:
+    - CommandLine
+    - ParentCommandLine
+tags:
+    - attack.execution
+    - attack.t1047
+falsepositives:
+    - Unknown
+level: high