Detectionhightest

PUA - Ngrok Execution

Detects the use of Ngrok, a utility used for port forwarding and tunneling, often used by threat actors to make local protected services publicly available. Involved domains are bin.equinox.io for download and *.ngrok.io for connections.

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Launch

Florian Roth (Nextron Systems)Created Fri May 14Updated Tue Feb 21ee37eb7c-a4e7-4cd5-8fa4-efa27f1c3f31windows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection1:
        CommandLine|contains:
            - ' tcp 139'
            - ' tcp 445'
            - ' tcp 3389'
            - ' tcp 5985'
            - ' tcp 5986'
    selection2:
        CommandLine|contains|all:
            - ' start '
            - '--all'
            - '--config'
            - '.yml'
    selection3:
        Image|endswith: 'ngrok.exe'
        CommandLine|contains:
            - ' tcp '
            - ' http '
            - ' authtoken '
    selection4:
        CommandLine|contains:
            - '.exe authtoken '
            - '.exe start --all'
    condition: 1 of selection*