So basically I know someone to likes to mess with and hack peoples devices (windows,android,etc). I was close to him and he was able to get physical access to my Samsung Galaxy S3 i747. I was infected with what I believe to be some kind of bootkit. Im currently unable to find anyway to stock restore it. I have the TWRP custom recovery and have attempted to factory wipe and reset every way with TWRP and it fails everytime with the infected files still intact. I've only managed to delete the OS and it wont let me install a stock rom as that fails as well. ADB fails to start and my laptop fails to recognize the device. I was able to find a folder named "unified android toolkit" on their pc. Any ideas to help me restore my Galaxy infection free and stock is appreciated. Im thinking i need to start with replacing the bootloader.