splApache-2.0from splunk/security_content

Remote Process Instantiation via WinRM and PowerShell

The following analytic detects the execution of `powershell.exe` with arguments used to start a process on a remote endpoint via the WinRM protocol, specifically targeting the `Invoke-Command` cmdlet. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line executions and process telemetry. This activity is significant as it may indicate lateral movement or remote code execution attempts by adversaries. If confirmed malicious, this could allow attackers to execute arbitrary code on remote systems, potentially leading to further compromise and lateral spread within the network.

Quality

FP risk

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Rule sourcedetections/endpoint/remote_process_instantiation_via_winrm_and_powershell.yml

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Processes
  WHERE `process_powershell` (Processes.process="*Invoke-Command*"
    AND
    Processes.process="*-ComputerName*")
  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)`
| `remote_process_instantiation_via_winrm_and_powershell_filter`