Message-ID: <1109970190.4228cd0e27138@www.hiddenbit.org>
From: andrey at hiddenbit.org (Andrey Bayora)
Subject: Bypass of 22 Antivirus software with GDI+ bug
	exploit Mutations - part 2


The first part is here:
http://archives.neohapsis.com/archives/fulldisclosure/2004-10/0475.html

First, this post isn?t about ?how dangerous GDI+ bug or malicious JPEG
image?, but ?how good? is your antivirus software.

The issue is: only 1 out of 23 tested antivirus software can detect
malicious JPEG image (after 6 month from the public disclosure date).

Here is the link to results, JPEG file and my paper (GCIH practical)
that describes how to create this one:
http://www.hiddenbit.org/jpeg.htm

This one vendor (Symantec) that can detect it, obviously do it with the
?heuristic? detection (I don?t work for them and didn?t send them any
file, moreover I know cases when Symantec didn?t detect a virus that
?other? vendors do).
ClamAV antivirus detected this JPEG file 4 month ago, but strangely
can?t detect it now.
What happened?
What about 22 antivirus software vendors that miss this malicious JPEG?
The pattern or problem in these JPEG files is known and still many
antivirus software vendors miss it, did it can represent the quality of
heuristic engines?

OK, we know that any antivirus software can provide 100% protection


P.S.  After my first post (October 14,2004) about this problem ? all
antivirus software vendors added detection to the demo file provided by
me in couple of hours. Sadly for me, but it seems that they prefer
?playing cat and mouse? and not improve heuristic engines


Regards,
Andrey Bayora.
CISSP, GCIH

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