mak_penhotmail.com
Date: Thu Jun 03 2004 - 14:38:44 CDT

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In-Reply-To: <40BCBB44.7050202linuxbox.org>

the mere fact that its usb has nothing to do with the attack its self. what is to blame is that autorun is enabled by default on windows XP. that is why the attack works. usb makes it convenient to stick the memmory stick in any computer and have the user just open the memmory stick and the attack works and no antivirus or anything detects this till now.

in short,
usb = convenience
autorun = culprit (so to speak)

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>Message-ID: <40BCBB44.7050202linuxbox.org>
>Date: Tue, 01 Jun 2004 19:22:12 +0200
>From: Gadi Evron <gelinuxbox.org>
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>To: "Antonio Fontes 'Saphyr'" <saphyrnxtg.net>
>Cc: pen-testsecurityfocus.com
>Subject: Re: USB delivered attacks
>References: <002401c44458$53b94c80$9701010aJASEVO> <000c01c4475b$e1ed7c50$6401a8c0phoenix> <007101c447b7$55ffa0e0$c1fc17d4shania>
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>> In order to put some 'practice' on this attack, I ve been trying this night
>> to effectively use autorun mechanisms and see what could be possible.
>>
>> After reading the MSDN specs about autorun.inf file creation, I added
>> an autorun.inf into my USB device along with a little batch script whose
>> purpose was to copy the 'SAM' table and copy of the 'SET' command
>> result into a specific folder on the usb device.
>>
>> Nothing happens... Even after being sure auto-run is enabled. Something
>> should be missing... are there specific operating systems that disable
>> auto-run by default ? (I am using windows 2000)
>>
>> However, burning the batch + autorun file onto a cd-rom and inserting
>> it into the tray makes the auto-run sequence loading...
>>
>> So 2-cents question: which os'es do really use USB devices auto-run
>> and on which USB devices does it work ? (not a usb hard-disk key it
>> seems)...
>
>USB devices install a driver, nothing to do with autorun.inf that I know
>of.. You mis-understood.
>
>As your test suggested, it does work when using a CD.
>:)
>
> Gadi.
>
>--
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