> Well, sure, but how does it get into the system in the first place?
> With windoz, you can have sabotage software inserted by email. I dont
> think you can do that with Arachne, or any of the other DOS tools.
Boot sector viri spread by infecting the boot sectors of floppy diskettes.
Next time an infected floppy is used to boot a system, the virus becomes
resident and spreads to the hard drive, and so from every boot it's in
memory infecting all disks. There are some combined executable/boot-sector
viri (those which spread as a payload in an executable file and as
bootsectors) which could infect your system if you received and ran them,
and there are some viri which spread (at least initially) through trojan
software - however, since the virus is infecting below DOS (the boot-sector,
although a part of DOS in some ways, doesn't have access to DOS itself),
whether DOS or Windows is in use has absolutely no effect on the result.
The OS isn't in RAM at the time the virus runs!
Regards,
Ben A L Jemmett.
(http://web.ukonline.co.uk/ben.jemmett/, http://www.deltasoft.com/)
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