Suspicious Network Connection Initiated To DevTunnels Domain (via network_connection)

title: Suspicious Network Connection Initiated To DevTunnels Domain (via network_connection)
id: 0463ab5c-bfbc-5005-a182-5e291aff2e92
status: stable
description: This rule detects network connections to Devtunnels domains initiated by a process on a system. Adversaries can misuse that feature to establish a reverse shell or persistence on a machine.
references:
    - https://attack.mitre.org/techniques/T1572/
    - https://attack.mitre.org/techniques/T1567/001/
    - https://blueteamops.medium.com/detecting-dev-tunnels-16f0994dc3e2
    - https://learn.microsoft.com/en-us/azure/developer/dev-tunnels/security
    - https://cydefops.com/devtunnels-unleashed
author: Huntrule Team
date: 2026-04-13
tags:
    - attack.exfiltration
    - attack.command-and-control
    - attack.t1567.001
    - attack.t1572
logsource:
    category: network_connection
    product: windows
detection:
    selection:
        Initiated: 'true'
        DestinationHostname|endswith: '.devtunnels.ms'
    condition: selection
falsepositives:
    - Unknown
level: medium