some legitimate printer-related processes may show up as children of spoolsv.exe. you should confirm that any activity as legitimate and may be added as exclusions in the search.

t1068
endpoint
splunk

Techniques

T1068

Sample rules

Child Processes of Spoolsv exe

source: splunk
technicques:
- T1068

Description

This search looks for child processes of spoolsv.exe. This activity is associated with a POC privilege-escalation exploit associated with CVE-2018-8440. Spoolsv.exe is the process associated with the Print Spooler service in Windows and typically runs as SYSTEM.

Detection logic


| tstats `security_content_summariesonly` count values(Processes.process_name) as process_name values(Processes.process) as process min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.parent_process_name=spoolsv.exe AND Processes.process_name!=regsvr32.exe by Processes.dest Processes.parent_process Processes.user 
| `drop_dm_object_name(Processes)` 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `child_processes_of_spoolsv_exe_filter`