Re: malware infesting windows part of dual-boot

2012-01-16 Thread Lorenzo Sutton

Hi Charles,

On 13/01/12 19:04, Charles Blair wrote:

I have the lenny release of debian and windows XP as a dual-
boot using grub 0.97.  The debian system (of course) seems to
be working fine, but I've gotten some malware (of course) on
the windows side.

 Can somebody recommend software (preferably free) that
will deal with the bad windows stuff without trashing the
linux system?  I'm concerned that running standard-issue
diagnostic and treatment stuff will tamper with the boot
sector, among other things.
In the past I have sometimes found it more effective and overall less 
time-consuming to simply re-install the system on malware-infested 
windows installations, than try to 'clean' them. I say this because 
something like the Trinity live cd may take up to 1 day or even more to 
scan with all the available antiviruses.
If you do decide to go this route the following cautions and drawbacks 
come to mind:


- Be sure to back-up any valuable data both on the Windows and Debian 
partitions (you never know when playing around with partitioning-enabled 
software), this would typically include the Documents and Settings 
directories for the various users on the windows side, /home 
partition/directory on debian maybe something in /etc. - YMMV
- This can usually be done by running any Live CD and attaching the 
machine to an external hard-disk but your mailage may vary depending on 
the size of data you need to backup.
- Consider the fact that for the windows side any infected file you 
back-up still remains so, although copying it off on an external hard 
disk, even better if on a dedicated partition *should* reduce the risk 
of reinfection if you take some sanitisation measures such as having an 
updated, un-compromised antivirus, treating with suspicion .exe, .com, 
.dll, office files etc.
- Reinstalling Windows XP *will* surely overwrite the MBR, thus if grub 
starts from there it will be unusable. But, this can easily be 
corrected, again through using more or less specific live CDs and 
googling around will provide many links.
- IIRC Windows installer will offer to use whole disk thus potentially 
deleting your debian partition(s) too! Check *very* carefully the 
partitioning options of the windows installer.
- In windows you will have to re-install all software. This is the 
biggest bummer, as it will be much more painful than e.g. re-installing 
all packages in debian because each software will have to be reinstalled 
manually. This especially applies to software with fussy authorisation 
methods such as sending emails, hardware snapshoting etc. A naive yet 
useful tip might be to print out the dir of the c:\Programs directory 
(or similar). In some enterprises windows machines bootstrapping is 
usually done to certain extent.


Good luck,
Lorenzo.


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Re: malware infesting windows part of dual-boot

2012-01-14 Thread Arnt Karlsen
On Fri, 13 Jan 2012 19:40:56 +, Brian wrote in message 
<20120113194056.GE2926@desktop>:

> On Fri 13 Jan 2012 at 13:04:16 -0600, Charles Blair wrote:
> 
> >I have the lenny release of debian and windows XP as a dual-
> > boot using grub 0.97.  The debian system (of course) seems to
> > be working fine, but I've gotten some malware (of course) on
> > the windows side.
> > 
> > Can somebody recommend software (preferably free) that
> > will deal with the bad windows stuff without trashing the
> > linux system?  I'm concerned that running standard-issue
> > diagnostic and treatment stuff will tamper with the boot
> > sector, among other things.
> 
> Debian, as you acknowledge, is a malware free zone. If something nasty
> is affecting another OS you are better off dealing with it within that
> OS. 

..really???  Like Obama, I have 2 words for you, 
mine may be a little harsher: Track records. ;o) 

> If the treatment affects the MBR you can complain to the software
> provider. Anyway, Debian has ways of restoring your MBR to good
> health.

..try 'man -k grub' for a list of ideas, then e.g. 
'man grub-mkrescue'.  

..if you lack that, e.g. 'apt-cache search grub-mkrescue' will 
list a few install suggestions worth an 'apt-cache show $item'.

-- 
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.


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[OT] Re: malware infesting windows part of dual-boot

2012-01-14 Thread Camaleón
On Fri, 13 Jan 2012 13:04:16 -0600, Charles Blair wrote:

> I have the lenny release of debian and windows XP as a dual- boot using
> grub 0.97.  The debian system (of course) seems to be working fine, but
> I've gotten some malware (of course) on the windows side.
> 
> Can somebody recommend software (preferably free) that
> will deal with the bad windows stuff without trashing the linux system? 
> I'm concerned that running standard-issue diagnostic and treatment stuff
> will tamper with the boot sector, among other things.

Yes, boot your windows system and use this online tool:

http://www.eset.com/us/online-scanner/

It's an online scanner, it has saved me many, many times :-)

Greetings,

-- 
Camaleón


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Re: malware infesting windows part of dual-boot

2012-01-14 Thread Rob Owens
On Fri, Jan 13, 2012 at 07:57:21PM -0600, John W. Foster wrote:
> On Sat, 2012-01-14 at 00:45 +0200, Andrei Popescu wrote: 
> > On Vi, 13 ian 12, 13:04:16, Charles Blair wrote:
> > > 
> > > Can somebody recommend software (preferably free) that
> > > will deal with the bad windows stuff without trashing the
> > > linux system?  I'm concerned that running standard-issue
> > > diagnostic and treatment stuff will tamper with the boot
> > > sector, among other things.
> > 
> > clamav?
> > 
With clamav you need to make sure you save the log.  I *think* that by
default, clamav only detects viruses and does not delete or quarantine
them.  So you'll need to search through the log for certain keywords
(which I can't remember, but probably something like "infected" or
"detected").

-Rob


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Re: malware infesting windows part of dual-boot

2012-01-14 Thread keitho
If you obtain a Trinity Rescue Disk (free download online) you can boot
from that and run four different anti-virus softwares with one command. If
I remember correctly, you can designate which partition to use them on.

Using TRK:
First, run updatetrk, then:
virusscan -n -a clam;virusscan -n -a fprot;virusscan -n -a bde;virusscan
-n -a va;virusscan -n -a avs

You will need the key for Avast that you can get free online as well (good
for 30 days).

This will take awhile (hours). Each anti-virus software will write a
report to the root directory of the partition you choose.

Keith


>I have the lenny release of debian and windows XP as a dual-
> boot using grub 0.97.  The debian system (of course) seems to
> be working fine, but I've gotten some malware (of course) on
> the windows side.
>
> Can somebody recommend software (preferably free) that
> will deal with the bad windows stuff without trashing the
> linux system?  I'm concerned that running standard-issue
> diagnostic and treatment stuff will tamper with the boot
> sector, among other things.
>
>Thanks, everyone!
>



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Re: malware infesting windows part of dual-boot

2012-01-13 Thread John W. Foster
On Sat, 2012-01-14 at 00:45 +0200, Andrei Popescu wrote: 
> On Vi, 13 ian 12, 13:04:16, Charles Blair wrote:
> > 
> > Can somebody recommend software (preferably free) that
> > will deal with the bad windows stuff without trashing the
> > linux system?  I'm concerned that running standard-issue
> > diagnostic and treatment stuff will tamper with the boot
> > sector, among other things.
> 
> clamav?
> 
> Kind regards,
> Andrei

MalwareBytes has a free trial version that works well.
frosty


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Re: malware infesting windows part of dual-boot

2012-01-13 Thread Andrei Popescu
On Vi, 13 ian 12, 13:04:16, Charles Blair wrote:
> 
> Can somebody recommend software (preferably free) that
> will deal with the bad windows stuff without trashing the
> linux system?  I'm concerned that running standard-issue
> diagnostic and treatment stuff will tamper with the boot
> sector, among other things.

clamav?

Kind regards,
Andrei
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Re: malware infesting windows part of dual-boot

2012-01-13 Thread Brian
On Fri 13 Jan 2012 at 13:04:16 -0600, Charles Blair wrote:

>I have the lenny release of debian and windows XP as a dual-
> boot using grub 0.97.  The debian system (of course) seems to
> be working fine, but I've gotten some malware (of course) on
> the windows side.
> 
> Can somebody recommend software (preferably free) that
> will deal with the bad windows stuff without trashing the
> linux system?  I'm concerned that running standard-issue
> diagnostic and treatment stuff will tamper with the boot
> sector, among other things.

Debian, as you acknowledge, is a malware free zone. If something nasty
is affecting another OS you are better off dealing with it within that
OS. If the treatment affects the MBR you can complain to the software
provider. Anyway, Debian has ways of restoring your MBR to good health.


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malware infesting windows part of dual-boot

2012-01-13 Thread Charles Blair
   I have the lenny release of debian and windows XP as a dual-
boot using grub 0.97.  The debian system (of course) seems to
be working fine, but I've gotten some malware (of course) on
the windows side.

Can somebody recommend software (preferably free) that
will deal with the bad windows stuff without trashing the
linux system?  I'm concerned that running standard-issue
diagnostic and treatment stuff will tamper with the boot
sector, among other things.

   Thanks, everyone!


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