I might have had a malware in old pc, and then i got new pc and plugged the old ps/2 keyboard used in old pc, to the new pc. Could my new pc be infected via keyboard?
BadUSB viruses reprogram the firmware of the usb controller of usb devices, and I see that this steelseries 7g keyboard also has some kind of micro processors, and usb controller because it also has usb plug even though the keyboard itself operates on ps/2 plug in. BadUSB works in a way, that it has added firmware in the micro controller that gives device keyboard functionality and then automatically for an example opens command line and writes commands to connect to malicious ip to download the actual spyware.
Steelseries 7g has 2 usb ports on keyboard, and microphone and headphone jack plug ins, so there is technically plenty of things to work with if someone wanted to put malicious code inside of the device.