Of course I wouldn't be trying to boot the virus infected O/S in
another
machine. I would just be wanting to get access to the HD.
When the host machine sees the NTFS volume, it may revise it. Bringing
it back to its home system may create version soup problems where the
file system is a "newer" revision than the current OS supports.
[...]
That last line doesn't seem clear. You seem to be saying that a virus
can run without requiring any means to get it started other than the
host machine starting up.
No, viruses (in this vein) are hosted by "programs" not "machines". You
can start the machine, look at all known start methods (run keys, BHOs,
etc...), find no suspicious processes running. No active malware at all
(full scan by antimalware also finds no inactive malware). Yet, when
(for instance) an "infected" text editor is invoked, the virus becomes
resident.
,
How can that be? Of course I'm aware of new
XP machines with no updates or service packs and open connections to
the
internet getting infected within minutes/hours, but how does a machine
become infected if it's completely cut off and there is no obvious
connection to the virus to get it started? Despite the fact the virus
file(s) may well still be on the machine, but not yet located.
If self-replicating malware doesn't use a host "program", it will
probably have another way to start. These types are commonly termed
"worms".
A virus can hide in a program that you use every time you fire up the
computer, or in a program that you only use once in a blue moon. Viruses
don't "care" whether they run or not - they might not be interested in
anything (data, computing power, serving you advertisements) they may
just sit there until you fire up your tax program for the 2013 tax
season and activate a payload if the date is after dec 21st 2012.
(I do expect a rash of malware to have trigger dates in line with the
ending of the Mayan calendar)
People are so used to having malware that wants to *use* their computing
power that they forget that malware can also just be interested in
spoiling your day by ending their computing power - like the old days.