Add basic netstat functionality

[maclarel]

This PR adds basic netstat functionality to Thanatos in order to facilitate enumeration of local network connections and sockets. This is accomplished using https://github.com/ohadravid/netstat2-rs, and data is returned to Mythic in JSON format for easy manipulation.

Invocation does not currently accept any additional parameters, and output is returned to Mythic in a JSON format so it can be easily dumped for further external automation/manipulation. Example:

netstat

[
    {
        "proto": "TCP",
        "local_addr": "127.0.0.53",
        "local_port": 53,
        "remote_addr": "0.0.0.0",
        "remote_port": 0,
        "associated_pids": "",
        "state": "LISTEN"
    },
    {
        "proto": "UDP",
        "local_addr": "10.0.0.1",
        "local_port": 68,
        "remote_addr": null,
        "remote_port": null,
        "associated_pids": "",
        "state": null
    },
    {
        "proto": "TCP",
        "local_addr": "10.0.0.1",
        "local_port": 22,
        "remote_addr": "10.0.0.2",
        "remote_port": 40803,
        "associated_pids": "",
        "state": "ESTABLISHED"
    },
    ...
]

Please note that I have not been able to properly test this on Windows, however this has been validated through testing on multiple Linux systems.

<3 from GitHub's Red Team

[MEhrn00]

This is awesome thank you so much! I added a little bit of minor feedback on some things. I tested this on Windows and it was working great.

I can throw together a browser script for the output to make it display better in the Mythic console.

[maclarel]

Appreciate the feedback here @MEhrn00 ! I'll get some updates pushed up in the next day or two. First time working with Rust so definitely some gaps on my end 😅

[maclarel]

Updates have been pushed. As with the original code, some testing on Linux looks positive 🤞

[MEhrn00]

Sweet! This looks great. I have a browser script for this ready and can get it all merged in 👍🏻

[MEhrn00]

Okay I merged it in and added it to the latest release Thanatos v0.1.10.

Thanks for this! 🙏