LoFP LoFP / a new child process of zoom isn't malicious by that fact alone. further investigation of the actions of the child process is needed to verify any malicious behavior is taken.

Techniques

Sample rules

First Time Seen Child Process of Zoom

Description

This search looks for child processes spawned by zoom.exe or zoom.us that has not previously been seen.

Detection logic


| tstats `security_content_summariesonly` min(_time) as firstTime values(Processes.parent_process_name) as parent_process_name values(Processes.parent_process_id) as parent_process_id values(Processes.process_name) as process_name values(Processes.process) as process from datamodel=Endpoint.Processes where (Processes.parent_process_name=zoom.exe OR Processes.parent_process_name=zoom.us) by Processes.process_id Processes.dest 
| `drop_dm_object_name(Processes)` 
| lookup zoom_first_time_child_process dest as dest process_name as process_name OUTPUT firstTimeSeen 
| where isnull(firstTimeSeen) OR firstTimeSeen > relative_time(now(), "`previously_seen_zoom_child_processes_window`") 
| `security_content_ctime(firstTime)` 
| table firstTime dest, process_id, process_name, parent_process_id, parent_process_name 
|`first_time_seen_child_process_of_zoom_filter`