diff --git a/rules/windows/process_creation/win_susp_regsvr32_no_dll.yml b/rules/windows/process_creation/win_susp_regsvr32_no_dll.yml
index 54e5d1bc0..50c46fd78 100644
--- a/rules/windows/process_creation/win_susp_regsvr32_no_dll.yml
+++ b/rules/windows/process_creation/win_susp_regsvr32_no_dll.yml
@@ -16,7 +16,11 @@ detection:
     selection:
         ParentImage|endswith: '\regsvr32.exe'
     filter:
-        CommandLine|contains: '.dll'
+        CommandLine|contains: 
+            - '.dll'
+            - '.ocx'
+            - '.cpl'
+            - '.ax'
     condition: selection and not filter
 fields:
     - CommandLine