Shouldn't turning off autoplay prevent this spreading (not it becoming infected 
of course)?

-----Original Message-----
From: Ben Scott [mailto:[email protected]] 
Sent: Wednesday, January 28, 2009 5:25 PM
To: NT System Admin Issues
Subject: Malware and USB flash drives (was: Bookmark management programs)

On Wed, Jan 28, 2009 at 9:13 AM, Hart, Robert
<[email protected]> wrote:
> To go even further load Firefox portable on a USB stick and foxmarks and
> then you don't even have to worry about it if you are at some random
> location.

  Use extreme caution when carrying software around on a USB flash
drive (or other writable, removable media).  There's a lot of
malicious software out these these days that's using them to
propagate.  So you mount the drive in a compromised computer, and the
drive becomes compromised.  Now every other unprotected computer you
mount the drive in will also become compromised.

  It's like floppy disk borne viruses from the 1980s all over again.

  Propagation methods could include AUTORUN.INF (so the malware
executes as soon as you mount the drive) and traditional virus
(modification of nominally trustworthy executable).  I know the first
has been publicly reported.

  USB flash drives with a hardware write-protect switch can be used to
prevent the drive from becoming compromised.  However, many people
want their drive to be writable for data updates, so this is a
loss-of-functionality issue.

  Even a read-only drive will not protect you from an already
compromised host computer.  For example, if you mount a USB flash
drive with Firefox on a public computer that's been compromised with a
keystroke logger, and then log-in to your corporate web mail, you've
now given away your corporate password.  (Or your personal bank
account credentials; you get the idea.)

-- Ben

~ Finally, powerful endpoint security that ISN'T a resource hog! ~
~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~


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