On Thu, 29 Mar 2007, Alexander Sotirov wrote:

> Today Microsoft released a security advisory about a vulnerability in the
> Animated Cursor processing code in Windows:
> http://www.microsoft.com/technet/security/advisory/935423.mspx
>
> It seems like the vulnerability is already exploited in the wild:
> http://asert.arbornetworks.com/2007/03/any-ani-file-could-infect-you/

Bleeding Edge Threats made available Snort rule that detects some (all?)
exploits using this vulnerability:
http://www.bleedingthreats.net/index.php/2007/03/30/ms-ani-exploit-rule-
details-emerging/

I don't know if this rule detects all possible exploits or just one
particular type. Here is a Firekeeper version of the rule, which can
be used to detect sites hosting malicious files:

alert (msg:"BLEEDING-EDGE CURRENT EVENTS MS ANI exploit"; body_content:"|54 53 49 4C 03 00 00 00 00 00 00 00 54 53 49 4C 04 00 00 00 02 02 02 02 61 6E 69 68 52|"; reference:url,http://isc.sans.org/diary.html?storyid=2534; reference:url,http://www.avertlabs.com/research/blog/?p=233; reference:url,doc.bleedingthreats.net/2003519; fid:2003519; rev:1;)

Rule is triggered for example by the following images:
http://www.i5460.net/admin12/2.jpg
http://www.i5460.net/admin12/1.jpg

Cheers,
Jan Wrobel
http://firekeeper.mozdev.org

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