Earlier quoted context omitted.
> Could a user tell it's happening? What signals would indicate this? Is it increased CPU usage disguised as a system process? Intel AMT allows redirecting graphics output and keyboard/mouse/USB input over network connection. It's like a hardware device connected to HDMI port to capture screen and to USB ports to send inputs, but it's built right into the motherboard. It doesn't spawn a process in the operating syste…
Occasionally all these features would be quite useful if it was documented and accessible for mere mortals.
Mandatory disclaimer: it's highly recommended to keep the network port with active management interface isolated in a separate network with no internet access.