Splunk unknown stable spl

Schtasks scheduling job on remote system

The following analytic detects the use of 'schtasks.exe' to create a scheduled task on a remote system, indicating potential lateral movement or remote code execution. It leverages process data from Endpoint Detection and Response (EDR) agents, focusing on specific command-line arguments and flags. This activity is significant as it may signify an adversary's attempt to persist or execute code remotely. If confirmed malicious, this could allow attackers to maintain access, execute arbitrary commands, or further infiltrate the network, posing a severe security risk.

View Source

Detection Logic

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime 
FROM datamodel=Endpoint.Processes
  
WHERE (
        Processes.process_name = schtasks.exe
        
OR
        Processes.original_file_name=schtasks.exe
    )
    (Processes.process="*/create*" 
AND Processes.process="*/s *")
  BY Processes.action Processes.dest Processes.original_file_name
     Processes.parent_process Processes.parent_process_exec Processes.parent_process_guid
     Processes.parent_process_id Processes.parent_process_name Processes.parent_process_path
     Processes.process Processes.process_exec Processes.process_guid
     Processes.process_hash Processes.process_id Processes.process_integrity_level
     Processes.process_name Processes.process_path Processes.user
     Processes.user_id Processes.vendor_product
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `schtasks_scheduling_job_on_remote_system_filter`

False Positives

⚠ While it is possible to have false positives, due to legitimate administrative tasks, these are usually limited and should still be validated and investigated as appropriate.

Field Validations

Loading…

Comments (0)

Loading comments...