Non Photography related – Gerhard Schulze

A fast and convenient way to automate some tasks is to create an „bad usb“ working as a HID (human interface device), typing in commands for you. eg. doing a backup or starting apps you need.

I did this on an rapberry pico.

Step 1:

Download CircuitPython
Plug your raspberry pi pico in
Copy & paste the downloaded .uf2 in the raspberry pi pico.
Unplug and plug your raspberry pi pico

Now your Raspberry pi pico will be the CircuitPython.

Step 2:

Making the raspi pico a hid device.
Download link ⇒ adafruit-circuitpython-bundle-6.x-mpy-20210130.zip
Now extract the zip
Open the folder and go to the ⇒ lib ⇒ adafruit_hid
Copy the adafruit_hid folder and paste it into the raspberry pi pico ⇒ lib folder.

Step 3:

Delete the code.py file from raspberry pi pico.
Download the python file which will convert our payload. File Download Link ⇒ pico-ducky
Open the folder and copy & paste the duckyinpython.py file to the raspi pico.
Rename the duckyinpython.py file to the code.py.

OK, now load a payload on the raspi and watch.

But: it works as an englisah (US) HID, on a german language PC it will not work.

So I did this:

Go to the latest release page, look if your language is in the list.

Download the py zip, named circuitpython-keyboard-layouts-py-XXXXXXXX.zip

Find your language/layout in the lib directory

For a language de, copy the following files from the zip’s lib folder to the lib directory of the board.
DO NOT modify the adafruit_hid directory. Your files go directly in lib.
DO NOT change the names or extensions of the files. Just pick the right ones.
Replace LANG with the letters for your language of choice.

keyboard_layout.py
keyboard_layout_win_de.py
keycode_win_de.py

Modify the pico-ducky.py (later) code.py on the pi to use your language file:

At the start of the code.py replace these lines:

from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
from adafruit_hid.keycode import Keycode

With this lines:

from keyboard_layout_win_de import KeyboardLayout
from keycode_win_de import Keycode

And also replace this line:

layout = KeyboardLayoutUS(kbd)

With this line:

layout = KeyboardLayout(kbd)

Now — you have a ducky for a german pc…