Is it possible to reprogram a flash drive to a keyboard emulator?

Question

linux

That is, so that the flash drive is a keyboard and, when connected, "presses" some keys. Or is it necessary to make a device from scratch on a special programmable microcircuit for something like this?
UPD:
I succeeded via sudo cat /dev/sdc | head -n 4096 > usb_4096 read the first 4 KiB but I only found MBR there, no attachments or the like

Answer 1

On the basis of a flash drive, I think it will be difficult to create something like that. If I were you, I'd look at teensy ( use case ) or USB Rubber ducky .

Answer 2

Or is it necessary to make a device from scratch on a special programmable microcircuit for something like this?

Correct way of thinking. Such devices exist. Google " hacker business cards ".
After reading the instructions on the business card, its owner connects it to the computer's USB port, then launches Notepad, presses Caps Lock several times and sees a greeting / additional. information from a hacker, which is entered just by the keyboard emulation method.
A flash drive cannot be converted into such a device, however, you can put such hardware into the body of a flash drive.

Answer 3

we need to collective farm ourselves, a flash drive -
we take the old clave .... derbanim .... we add a primitive circuit that sequentially closes the necessary keys - profit
I confess ... I did it myself .... I had to turn on the program once when a person came in (April 1 ).
Arduino + ultrasonic sensor + relay closing the ENTER pins.
a program of a couple of lines, if the distance is less than xxx press enter.
and already in windows they left the focus on the shortcut of the desired program.

Answer 4

We take a clone of Arduino Uno v3 ($15+/-) flash it like a keyboard (there is an 8U controller, it allows you to flash it for anything) we roll the sketch, there is very little code, and voila