Trojans are malicious applications that pose themselves as legitimate software in order to trick users to install them. Once on the victim's machine, it may run any number of malicious process to steal vital information or inflict damage to other software.
This Trojan program is a DOS Com file written in Assembler. On start-up, this Trojan writes random data to the MBR sector of the victim machine's first hard disk. As a result, no operating system can load. When the computer is rebooted, it will freeze.