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You can build a cheap keystroke injection stick with the digispark for less than 2€. I work with embedded devices and I often need to setup a testing enviroment I need to get remote access to. This stick is setting up a reverse shell in less than 10 seconds.
Please only use it on devices you personally own or have permission to have access!
I dont like the Arduino IDE and its toolchain. In this project Im using platformio which is a open source IoT build-ecosystem for embedded devices. If you are interested in learning more about platformio go to https://platformio.org.
You can install platformio via:
$ pip install -U platformio
Thats it! Everything else is handled via platformio based on the "platformio.ini" file in the repository.
Keep the digispark unplugged and run:
$ pio run -t upload
It will download all needed libraries and frameworks and compile the project. After successful compilation it will ask you to plug in the digispark. Plug it in, and done!
You need to have a machine listenting for incomming connections like:
$ nc -nvlp 8000
This will listen for incomming conncetions on port 8000, as also used in the sample code provided. . This is handy in case you are on the same network. Im using it in combination with Platypus to manage my reverse shell connections.
#ToDo
- Add reverse shell cheat sheet
- Integrate duck build script into submodules and platformio build
- Integrate a parameter file for easy port and ip/url settings