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Can a Virus Infect the BIOS?

 
 
Nancy
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      15th Jun 2006
I'm not even sure if my PC has a virus now.
It started out with sudden rebooting.
My PC is unable to boot up at all into Windows now.
I have Avast anti virus installed and auto updates enabled and
installed.
Also did a full anti-virus scan.

There was a big yellow question mark in the Device Mngr list
pertaining to the USB bus so I disabled it.
I also disabled it in the BIOS.

Since then, when booting up, I get to the safe mode menu and select
safe mode. The screen just hangs and nothing happens.

I am going to put a new hard drive in but was wondering.....
If the PC was infected with a virus, could my new hard drive get
infected from the BIOS?

Thank you.

Nancy






 
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Robert Baer
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      15th Jun 2006
Nancy wrote:

> I'm not even sure if my PC has a virus now.
> It started out with sudden rebooting.
> My PC is unable to boot up at all into Windows now.
> I have Avast anti virus installed and auto updates enabled and
> installed.
> Also did a full anti-virus scan.
>
> There was a big yellow question mark in the Device Mngr list
> pertaining to the USB bus so I disabled it.
> I also disabled it in the BIOS.
>
> Since then, when booting up, I get to the safe mode menu and select
> safe mode. The screen just hangs and nothing happens.
>
> I am going to put a new hard drive in but was wondering.....
> If the PC was infected with a virus, could my new hard drive get
> infected from the BIOS?
>
> Thank you.
>
> Nancy
>
>
>
>
>
>

It is possible, but i understand that boot viri are very rare these daze.
 
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eatfastnoodle
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      15th Jun 2006
Back in the mid-late 90s, there was a virus written by some guy in
Taiwan that can effectively wipe out all the information stored in your
BIOS, it caused a lot of serious damage worldwide, but those kind of
viruses require very high privilege which I think only DOS and DOS
based Windows 98 can provide, ever since the introduction of Windows
2000, that kind of viruses become very rare, in fact, I don't think
there are many new hardware-damaging viruses being written, and the
spread of high-speed Internet also makes worms much more appealing to
virus writer because of the speed of spreading, and those old viruses
are all ineffective if your OS are win2000 or above, of course, I'm no
expert on virus, so there maybe something I don't know, but if your
machine has hardware problems, it's more likely to be the problem of
hardware instead of virus.

 
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Art
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      15th Jun 2006
On Thu, 15 Jun 2006 07:05:45 GMT, "Nancy" <(E-Mail Removed)>
wrote:

>I am going to put a new hard drive in but was wondering.....
>If the PC was infected with a virus, could my new hard drive get
>infected from the BIOS?


Extremely unlikely that your BIOS was reflashed by malicious code.
In known cases of malicious BIOS reflashing, it has been a trashing
of the BIOS to the extent that the machine is completely unusable.

Art
http://home.epix.net/~artnpeg
 
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Art
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      15th Jun 2006
On Thu, 15 Jun 2006 07:37:31 GMT, Robert Baer
<(E-Mail Removed)> wrote:


>> I am going to put a new hard drive in but was wondering.....
>> If the PC was infected with a virus, could my new hard drive get
>> infected from the BIOS?


>>

> It is possible, but i understand that boot viri are very rare these daze.


You're confused. Boot viruses affect sectors on hard drives, not the
BIOS.

Art
http://home.epix.net/~artnpeg
 
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kurt wismer
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      15th Jun 2006
Nancy wrote:
> I'm not even sure if my PC has a virus now.
> It started out with sudden rebooting.
> My PC is unable to boot up at all into Windows now.
> I have Avast anti virus installed and auto updates enabled and
> installed.
> Also did a full anti-virus scan.
>
> There was a big yellow question mark in the Device Mngr list
> pertaining to the USB bus so I disabled it.
> I also disabled it in the BIOS.
>
> Since then, when booting up, I get to the safe mode menu and select
> safe mode. The screen just hangs and nothing happens.
>
> I am going to put a new hard drive in but was wondering.....
> If the PC was infected with a virus, could my new hard drive get
> infected from the BIOS?


no, your new hard drive will not get infected from the bios...

as yet there are no viruses that live in the bios... there are a few
pieces of malware that overwrite the bios with garbage but that's as
close as it gets right now... and since you can at least get to the
screen that shows the option to boot in safe mode it would appear that
your bios is more or less ok (you wouldn't be able to get that far if it
had been overwritten by the previously mentioned malware)...

--
"it's not the right time to be sober
now the idiots have taken over
spreading like a social cancer,
is there an answer?"
 
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Ken
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      15th Jun 2006
In article <dF7kg.6123$(E-Mail Removed)>,
(E-Mail Removed) says...

Can you boot a boot floppy or a bootable CD? If you can't, it ain't
your hard drive.

> I'm not even sure if my PC has a virus now.
> It started out with sudden rebooting.
> My PC is unable to boot up at all into Windows now.
> I have Avast anti virus installed and auto updates enabled and
> installed.
> Also did a full anti-virus scan.
>
> There was a big yellow question mark in the Device Mngr list
> pertaining to the USB bus so I disabled it.
> I also disabled it in the BIOS.
>
> Since then, when booting up, I get to the safe mode menu and select
> safe mode. The screen just hangs and nothing happens.
>
> I am going to put a new hard drive in but was wondering.....
> If the PC was infected with a virus, could my new hard drive get
> infected from the BIOS?
>
> Thank you.
>
> Nancy
>
>
>
>
>
>
>

 
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James Egan
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Posts: n/a
 
      15th Jun 2006
On Thu, 15 Jun 2006 07:32:10 -0400, kurt wismer <(E-Mail Removed)>
wrote:

>no, your new hard drive will not get infected from the bios...
>


There was a thread here a month or two ago (or was it acv?) where the
OP reckoned his hard disk mbr was getting infected by the bios during
the power on self test phase of the boot sequence and if he moved the
hard disk to another machine it was okay. He didn't post any
meaningful evidence though so maybe he was just another usenet crank.


Jim.

 
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David W. Hodgins
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      15th Jun 2006
On Thu, 15 Jun 2006 03:05:45 -0400, Nancy <(E-Mail Removed)> wrote:

> I'm not even sure if my PC has a virus now.
> It started out with sudden rebooting.


Many possible causes, not just viruses.

> My PC is unable to boot up at all into Windows now.
> I have Avast anti virus installed and auto updates enabled and
> installed.
> Also did a full anti-virus scan.


What version of java do you have installed. You should have
jre-1_5_0_07, and no prior versions.

> There was a big yellow question mark in the Device Mngr list
> pertaining to the USB bus so I disabled it.
> I also disabled it in the BIOS.


Ok this indicates at least one hardware/driver problem. First ensure
the fans on the power supply, and cpu are operating properly, and
the case openings are not clogged by dust.

Unplug, and then reconnect every connector, to ensure clean contact,
on every cable in the case. Same with each memory card, pci card,
etc.

> Since then, when booting up, I get to the safe mode menu and select
> safe mode. The screen just hangs and nothing happens.


It's possible that a hardware problem has now caused filesystem
corruption.

> I am going to put a new hard drive in but was wondering.....
> If the PC was infected with a virus, could my new hard drive get
> infected from the BIOS?


Although in theory, it's possible for a virus to flash the bios,
there are no known viruses that will do so without corrupting
the bios to the point you wouldn't even be able to boot into
the bios setup.

As to infecting the new hd, that could only happen if you boot
from the current hd (and it's infected), with the new hd connected.
If you boot from an installation cd, you should be ok. Once you
boot from the installaton cd, try the repair option, to run chkdsk,
(or scandisk if this is an pre XP version of windows).

Note that you should virus scan the new hd, before booting from it,
just to ensure it doesn't come with a pre-installed virus. That's
how I was hit with the ripper boot virus, a decade or so ago.

Regards, Dave Hodgins

--
Change nomail.afraid.org to ody.ca to reply by email.
(nomail.afraid.org has been set up specifically for
use in usenet. Feel free to use it yourself.)
 
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Robert Baer
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      15th Jun 2006
Art wrote:

> On Thu, 15 Jun 2006 07:37:31 GMT, Robert Baer
> <(E-Mail Removed)> wrote:
>
>
>
>>>I am going to put a new hard drive in but was wondering.....
>>>If the PC was infected with a virus, could my new hard drive get
>>>infected from the BIOS?

>
>
>> It is possible, but i understand that boot viri are very rare these daze.

>
>
> You're confused. Boot viruses affect sectors on hard drives, not the
> BIOS.
>
> Art
> http://home.epix.net/~artnpeg

No; a "good" BIOS virus will write one on the HD, so that if the BIOS
was somehow "fixed", then the boot virus will rewrite the BIOS copy.
Just like some virii hide a copy in the registry garbage pile.
Three components: the running program, the HD file(s), and the
registry entry/entries.
Delete any part and it will shortly pop back.
Almost as bad as the chicken and egg "problem".

 
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