ITEM NAME:32U4 BadUsb Microcontroller ATMEGA32U4 Development Board Virtual Keyboard #gib Store Home Promotion Hot Item Add to Fav.The most terrible thing about BadUSB is that malicious code exists in the firmware of the U disk. Bad USB is to make the USB device disguise as a keyboard, and the inserted computer will be promptly input certain "instructions", which will make the computer quickly infected by the virus.