Packer testing

["Jason Kratzer" <kratzer.jason () gmail com>]

Barcajax,

It depends on whether or not you are just trying to hide a file in a
jpg, or actually have it execute disguised as a jpg.  The latter I
don't know how to do, but if you just want to embed an executable in
an image file, you could use something like Forensic Toolkit or even
the freeware Autopsy which comes with most live security distros.
Even Hex Workshop will allow you to do this but you've got to embed it
in the right place so that the image will still display, while
covering up the existence of the executable.  Typically you would need
to place it at the end of the image file.  If you place it after the
image header, portions of the image will appear corrupt or not display
at all  Hope this makes sense to you...

--Jason Kratzer


On 10 Aug 2006 13:58:34 -0000, barcajax () gmail com < barcajax () gmail com> wrote:
> I came across an article that introduced the concept of using packer software to hide an executable file in another 
> file such as a jpg file. I want to try this out but am worried about downloading malicious files disguised as packers. 
> Can anyone recommend a legit/safe packer that I can use for my testing purpose? Thanks.
>
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This List Sponsored by: Cenzic

Concerned about Web Application Security? 
Why not go with the #1 solution - Cenzic, the only one to win the Analyst's 
Choice Award from eWeek. As attacks through web applications continue to rise, 
you need to proactively protect your applications from hackers. Cenzic has the 
most comprehensive solutions to meet your application security penetration 
testing and vulnerability management needs. You have an option to go with a 
managed service (Cenzic ClickToSecure) or an enterprise software 
(Cenzic Hailstorm). Download FREE whitepaper on how a managed service can 
help you: http://www.cenzic.com/news_events/wpappsec.php 
And, now for a limited time we can do a FREE audit for you to confirm your 
results from other product. Contact us at request () cenzic com for details.
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