Arduino Clone Board A.K.A BadUSB Trace - ATmega32u4 Metal USB Device
a.k.a BAD USB / BadUsb
These small devices are known by many sudonames on the internet, mostly surrounding the topic Arduino ATmega32u4 & Arduino Beetle Board.
After opening up the device, it is not an official Arduino at all - it is a cheap Chinese clone or a SFF Small Form Factor edition of the Atmega32u4.
Due to the disappointing amount of information on this board, i have decided to do my own pcb trace to the available digital pins, the aim was to find out if any usable pins are available or if this was entirely designed for HID attacks alone.
MISO ( Master In, Slave Out ) = Digital Pin 14
MOSI ( Master Out, Slave In ) = Digital Pin 16
SCK = Digital Pin 15
An LED has not been placed in position as this would be useless with the surrounding metal encasing, this also provides me with an easy to access soldering point for the LED Pin = Digital Pin 13.
So in total we have access to,
PINS
• 13
• 14
• 15
• 16
• VCC 5v
• GND
• RESET
With 4 easily accessible digital pins, we can create some rather complex hardware controllers, the first thing in my mind is Animatronics with Servo motors.
DISASSEMBLY
CPU PINOUT
BOARD TRACE
