What is Twelve Tricks??
Twelve Tricks is a trojan horse that first appeared around 1990.
Purdue University issued a bulletin about the Trojan on March 8, 1990. The Trojan came in an altered utility file called CORETEST.COM, which was intended to test performance of hard drives. The trojan affected IBM platform computers running MS-DOS or PC-DOS. The trojan alters the master boot record (partition sector) and, at every reboot, it installs one of twelve "tricks" that causes issues with hardware or operation of the computer. The trick vanishes when the power is cut off, and any of the twelve tricks may appear or reappear on the next reboot. In addition, on each boot the trojan uses a random number generator to determine whether to do a
Twelve Tricks is a trojan horse that first appeared around 1990.Purdue University issued a bulletin about the Trojan on March 8, 1990. The Trojan came in an altered utility file called CORETEST.COM, which was intended to test performance of hard drives. The trojan affected IBM platform computers running MS-DOS or PC-DOS. The trojan alters the master boot record (partition sector) and, at every reboot, it installs one of twelve "tricks" that causes issues with hardware or operation of the computer. The trick vanishes when the power is cut off, and any of the twelve tricks may appear or reappear on the next reboot. In addition, on each boot the trojan uses a random number generator to determine whether to do a














