Learning more about RFI Attacks

As part of the work at our lab we started to work on methods to learn more about remote file inclusion (RFI) attacks. The Internet Storm Center has developed a web-based honeypot which is available in a beta version. This honeypot can be used to collect information about different kinds of attacks, but requires the participant to install and maintain a honeypot on his own. For example, it is possible to deploy this honeypot on a OpenWrt router.
Since we are aiming only at RFI attacks, an easier approach is to redirect incoming malicious request to a central honeypot which then aggregates the information. Jan already blogged about this idea, this posting is meant to spread the word.

You can help us by using the following .htaccess file on your web server:
Options +FollowSymlinks
RewriteEngine on
RewriteCond %{QUERY_STRING} (.+=http:\/\/.+)
RewriteRule ^(.+)$ http://link.informatik.uni-mannheim.de/$1?%1 [R,NC] 
The script checks if the incoming request looks like an RFI attack (RewriteCond) and then redirects this request to one of our honeypots (RewriteRule). Please let us know if you have any questions or ideas.

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