[arcaneman92]

It looks like it could be a variant of this squashed down to fit in the connector of a cable. https://github.com/spacehuhn/wifi_ducky

If it is, then the computer doesn't connect to a router at all. The USB cable could make itself available as a network that you remotely connect to then execute commands. The cable then types out your commands as it imitates a USB keyboard. Have you ever seen a device or PC that randomly trusts a USB keyboard you plug into it?

[pault]

I can't tell if you're being sarcastic or not but yes, every device I own automatically accepts input from any keyboard I plug in.

[arcaneman92]

Sorry, I was trying to reply to the above comment by structuring it in the same way, but making one minor switch to show how severe the issue can be. Trusting a router may not happen, but trusting a keyboard (as you've pointed out) almost always does.