Trojan alert in our Website- Urgent

[alptankurt]

Hi.
I'm a software developer in Hurriyet which is the biggest news website in Turkey.
We have a urgert problem, please contact me as soon as possible. Some of visitors that use avast sent us some trojan alert in our website. But our servers are already clean. Please visit the link below and tell me what would we do.
Not just a link, some of our pages have the same problem.
Please tell us whats wrong and how we will fix the urgent problem.

Sample link : http://dosyalar.hurriyet.com.tr/annelergunu/yerler.asp

Note: I guess avast comprehends the script which have a iframe code.(Line 4, <iframe src="http://www.hurriyet.com.tr/uv/dosyalar/uv.asp...)

http://sitecheck.sucuri.net/results/www.hurriyet.com.tr/anasayfa/

Edit: URL:   http://www.hurriyet.com.tr/favicon.ico|{...

processus:   C:\Program Files (x86)\Mozilla Firefox\f...
infection:   JS:Iframe-DBE [Trj]

[Asyn]

-> http://sitecheck.sucuri.net/results/dosyalar.hurriyet.com.tr/annelergunu/yerler.asp
-> http://labs.sucuri.net/db/malware/malware-entry-mwiframehd202

[polonus]

Seems indeed the malware there has been closed: http://support.clean-mx.de/clean-mx/viruses?id=12257392
Send a FP report here: http://www.avast.com/contact-form.php

polonus