In this post, I break down how the BadUSB attack works—starting from its origin at Black Hat 2014 to a hands-on implementation using an Arduino UNO and custom HID firmware. The attack exploits the USB protocol's lack of strict device type enforcement, allowing a USB stick to masquerade as a keyboard and inject malicious commands without user interaction.
The write-up covers:
* How USB device firmware can be repurposed for attacks
* Step-by-step guide to converting an Arduino UNO into a BadUSB
