Merge pull request #2384 from frack113/redcanary_1218_011

Redcanary 1218 011

rules/windows/process_creation/win_pc_susp_rundll32_script_run.yml

@@ -0,0 +1,28 @@
+title: Suspicious Rundll32 Script in CommandLine
+id: 73fcad2e-ff14-4c38-b11d-4172c8ac86c7
+status: experimental
+description: Detects suspicious process related to rundll32 based on arguments
+author: frack113
+references:
+  - https://gist.github.com/ryhanson/227229866af52e2d963cf941af135a52
+  - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.011/T1218.011.md
+date: 2021/12/04
+logsource:
+  category: process_creation
+  product: windows
+detection:
+  selection_run:
+    CommandLine|contains|all:
+      - rundll32
+      - 'mshtml,RunHTMLApplication'
+  selection_script:
+    CommandLine|contains:
+      - 'javascript:'
+      - 'vbscript:'
+  condition: all of selection_*
+falsepositives:
+  - False positives depend on scripts and administrative tools used in the monitored environment
+level: medium
+tags:
+  - attack.defense_evasion
+  - attack.t1218.011 

rules/windows/process_creation/win_susp_rundll32_activity.yml

@@ -8,13 +8,13 @@ references:
   - https://twitter.com/Hexacorn/status/885258886428725250
   - https://gist.github.com/ryhanson/227229866af52e2d963cf941af135a52
 date: 2019/01/16
-modified: 2021/11/27
+modified: 2021/12/04
 logsource:
   category: process_creation
   product: windows
 detection:
   selection:
-    - CommandLine|contains:
+    - CommandLine|contains|all:
       - 'javascript:'
       - '.RegisterXLL'
     - CommandLine|contains|all: