Techniques
Sample rules
System Processes Run From Unexpected Locations
- source: splunk
- technicques:
- T1036
- T1036.003
Description
This search looks for system processes that typically execute from C:\Windows\System32\ or C:\Windows\SysWOW64. This may indicate a malicious process that is trying to hide as a legitimate process.
This detection utilizes a lookup that is deduped system32 and syswow64 directories from Server 2016 and Windows 10.
During triage, review the parallel processes - what process moved the native Windows binary? identify any artifacts on disk and review. If a remote destination is contacted, what is the reputation?
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Processes where Processes.process_path !="C:\\Windows\\System32*" Processes.process_path !="C:\\Windows\\SysWOW64*" by Processes.dest Processes.user Processes.parent_process Processes.process_path Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_hash
| `drop_dm_object_name("Processes")`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `is_windows_system_file_macro`
| `system_processes_run_from_unexpected_locations_filter`