BadUSB with MicroSD

This is one of the last developments related to rubber ducky or bad USB devices. This device is based on the ATMEGA32U4 microprocessor which can emulate many USB modes like HID, used for injecting key presses to the target system.

The main processor is based on the Arduino Leonardo R3 development board and the improvement is that a microSD card slot is included to allow storing many different payloads. The microSD card has to be FAT32 formatted to be recognized.

You can find the firmware and the instructions for flashing it in the following github:

• https://github.com/joelsernamoreno/badusb_sd_wifi

Specifications

• High Performance, Low Power AVR® 8-Bit Microcontroller Advanced RISC Architecture
• 16/32KB of In-System Self-Programmable Flash
• 1.25/2.5KB Internal SRAM – 512Bytes/1KB Internal EEPROM
• Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface USB 2.0 Fullspeed/
• Low Speed
• CPU Reset possible on USB Bus Reset detection
• 48MHz from PLL for Full-speed Bus Operation
• USB Bus Connection/Disconnection on Microcontroller Request
• Crystal-less operation for Low-Speed mode Peripheral Features
• On-chip PLL for USB and High-Speed Timer: 32 up to 96MHz operation
• One 8-bit Timer/Counter with Separate Prescaler and Compare Mode ATmega16U4/ATmega32U4 8-
• bit Microcontroller with 16/32K bytes of ISP Flash and USB Controller
• One 10-bit High-Speed Timer/Counter with PLL (64MHz) and Compare Mode
• Four PWM Channels with Programmable Resolution from 2 to 16 Bits
• Six PWM Channels for High-Speed Operation, with Programmable Resolution from 2 to 11 Bits
• Output Compare Modulator – 12-channels, 10-bit ADC (features Differential Channels with
• Programmable Gain)
• Programmable Serial USART with Hardware Flow Control
• Master/Slave SPI Serial Interface
• Operating Voltages 2.7 – 5.5V Operating temperature