MBR Infected Shell is a trojan on Microsoft Windows which overwrites or corrupts the user's MBR. This trojan was first discovered on the Fosshub server which was hacked on August 2, 2016. The attacker gained access to replace files such as Classic Shell and Audacity with a trojan in which tricks the user into thinking that they are downloading legitimate software. Some programs was also affected with this trojan. Websites such as VirusTotal do not detect this as a virus, which mislead users into thinking it is safe. Some users with experience in Windows, may find out that the software publisher is 'Unknown' when running the affected program.