How to Modify the USB Rubber Ducky with Custom Firmware

The USB Rubber Ducky comes with two software components, the payload script to be deployed and the firmware which controls how the Ducky behaves and what kind of device it pretends to be. This firmware can be reflashed to allow for custom Ducky behaviors, such as mounting USB mass storage to copy files from any system the Duck is plugged into. The USB Rubber Ducky, featured on Mr. Robot stealing login credentials, is a device designed to fit inside the "shell" of a cheap USB case to disguise itself as a normal USB mass storage drive. When plugged in, however, it acts like a keyboard, rapidly... more

from Null Byte « WonderHowTo full article here