This is a dangerous memory resident virus. It infects COM and EXE files (except COMMAND.COM) in the same way as the "Jerusalem" virus does, and affects boot sectors of hard and floppy disks. On a floppy disk it formats an additional track, on the hard disk it writes itself just after the MBR. Depending on its internal counters the virus can execute a dummy cycle after each timer interrupt (INT 8), erase information on disks, tune a melody, decipher and display the following message:
by ABT Group at Feng Chia Univ., Taiwan. Mar/27/90
The virus also contains the text "ACAD.EXECOMMAND.COM.COM.EXE" and hooks INT 8, 9, 13h, 21h.