Bye is a typical boot sector virus which infects the boot
sectors of diskettes and the main boot records of hard
disks. The virus is capable of infecting all common diskette
types (360, 720, 1200 and 1440 kilobytes). Bye was
discovered in Italy, at the end of September 1994.
The virus infects the hard disk when the computer is booted
from an infected diskette. Once the hard disk is infected
and the virus has loaded itself into memory, it shall infect
all non-write protected diskettes used in the computer.
The virus contains the following encrypted text: "Bye by C&CL".
Bye uses stealth virus techniques, so its code cannot
be seen on the hard disk's MBR while it is resident in
memory.
The virus stores the original main boot record on the last
sector of the hard disk's active partition. On diskettes,
the virus stores the boot sector on the diskette's last
sector.
The virus changes only 40 bytes in the boot sector - the
rest of the viruse's code is stored elsewhere. Bye does this
to avoid being detected by heuristic scanners.
