Update windows_service_created_with_suspicious_service_name.yml

Author: nterl0k

detections/endpoint/windows_service_created_with_suspicious_service_name.yml

@@ -49,9 +49,9 @@ rba:
     score: 75
   threat_objects: 
   - field: process
-    type: file_name
+    type: process
   - field: object_name
-    type: object_name
+    type: signature
 tags:
   analytic_story: 
   - Active Directory Lateral Movement
@@ -76,4 +76,4 @@ tests:
   attack_data:
   - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1055/sliver/sliver_windows-system.log
     source: XmlWinEventLog:System
-    sourcetype: XmlWinEventLog
+    sourcetype: XmlWinEventLog