Are you targeting the BIOS or the OS? Are you targeting it during boot or while running? I suppose targeting the BIOS would be cool. I guess it'd be easier to (through booting the pendrive) write your malware to the OS. I'd suggest replacing the default keyboard drivers with your own special flavor. In case of signed drivers you have a problem. Maybe you can modify the OS's routines for checking signatures. The lamer method would be getting some malware for Mac and some for Linux and placing everything in the right folders. Similar but different. Still you're only targeting OSs, never all OSs. You could instead target only BIOSs or UEFIs. Your choice. 2013/8/8 Yush Bhardwaj <yushbhardwaj91@gmail.com>

Guys I was trying to setup a pendrive as malware which works for all OS (Windows/Linux/Mac).

I know how to do it for windows but I am still searching to get my setup done for mac and linux. Any her knows anything about it

* * * * * * *Yush Bhardwaj*