This analytic looks for the execution of query.exe with command-line arguments utilized to discover the logged user. Red Teams and adversaries alike may leverage query.exe to identify system users on a compromised endpoint for situational awareness and Active Directory Discovery.
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System User Discovery With Query Help
To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the Endpoint datamodel in the Processes node.
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| tstats`security_content_summariesonly`countmin(_time) as firstTime max(_time) as lastTime fromdatamodel=Endpoint.Processes where (Processes.process_name="query.exe") (Processes.process=*user*) by Processes.dest Processes.user Processes.parent_process Processes.process_name Processes.process Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `system_user_discovery_with_query_filter`