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GetNetTcpconnection with PowerShell

The following analytic identifies the execution of `powershell.exe` with the `Get-NetTcpConnection` command, which lists current TCP connections on a system. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. Monitoring this activity is significant as it may indicate an adversary or Red Team performing network reconnaissance or situational awareness. If confirmed malicious, this activity could allow attackers to map network connections, aiding in lateral movement or further exploitation within the network.

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Detection Logic

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime 
FROM datamodel=Endpoint.Processes
  
WHERE (
        Processes.process_name="powershell.exe"
    )
    (Processes.process=*Get-NetTcpConnection*)
  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)`
| `getnettcpconnection_with_powershell_filter`

False Positives

⚠ Administrators or power users may use this command for troubleshooting.

Field Validations

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