full-disclosure - POS#1 Self-Executing HTML: Internet Explore r 5.5 and6.0 Part III

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From: RCompton at chartercom.com (Compton, Rich)
Subject: POS#1 Self-Executing HTML: Internet Explore
	 r  5.5 and6.0 Part III

FYI,

In the html source, the binary is converted to 2 digit hex and then
converted to decimal.
For example, the first part of the executable array is:

	jelmersArray= array(77,90,68,

The beginning hex of the executable looks like this in hex: 

	4D 5A 44 01  05 00 02 00

Convert 4D from hex to decimal and you get 77.
5A is converted to 90
44 is converted to 68
you get the point!

-----Original Message-----
From: Compton, Rich 
Sent: Thursday, November 06, 2003 12:36 PM
To: 'Bart.Lansing@...ls.com'; full-disclosure@...ts.netsys.com
Subject: RE: [Full-Disclosure] POS#1 Self-Executing HTML: Internet
Explore r 5.5 and6.0 Part III

How is this binary converted to the array in the source and then converted
back to a binary???
Anybody have information on how this is done?  

This makes me very worried!  This could bypass all the antivirus filters
that remove executables!

-Rich Compton

-----Original Message-----
From: Bart.Lansing@...ls.com [mailto:Bart.Lansing@...ls.com]
Sent: Thursday, November 06, 2003 9:26 AM
To: full-disclosure@...ts.netsys.com
Subject: Re: [Full-Disclosure] POS#1 Self-Executing HTML: Internet
Explorer 5.5 and6.0 Part III

Has the Win2kSP4/IE6.0 combination been confirmed as immune to this?

full-disclosure-admin@...ts.netsys.com wrote on 11/05/2003 04:36:16 PM:

> Doesn't appear to work on Win2kSP4 with IE6.
>
>
> --- "http-equiv@...ite.com" <1@...ware.com> wrote:
> >
> >
> > Wednesday, November 5, 2003
> >
> > In our never-ending quest for entertainment, we
> > commece from
> > this date forward to end-2004 our POS series of
> > findings. That
> > is the 'perfect operating system'. Today we debut
> > and regurgitate
> > new and not so new for fun as follows. A warm up for
> > the New Year if
> > you will !:
> >
> > The following file is an html file comprising both
> > scripting and an
> > executable [*.exe].
> >
> > We inject scripting and an executable into the html
> > file which is
> > designed to point back to the executable in the html
> > file and execute
> > it. Provided the html file is an html file, Internet
> > Explorer 5.5 and
> > 6.0 will execute it.
> >
> > Because it is an html file proper, Internet Explorer
> > opens it. The
> > scripting inside is then parsed and fired. That
> > scripting is pointing
> > back to the same executable file and because it is a
> > self-executing
> > html file, it executes !
> >
> > Fully self-contained harmless *.exe:
> >
> > CAUTION: back up notepad.exe before opening
> >
> > http://www.malware.com/self-exec.zip
> >
> > What a POS !
> >
> > Be aware of html files out there.
> >
> > --
> > http://www.malware.com
> >
> >
> >
> > _______________________________________________
> > Full-Disclosure - We believe in it.
> > Charter:
> http://lists.netsys.com/full-disclosure-charter.html
>
>
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