Our site redirecting to some search engine

[FockerFGAA]

With users that have firefox they are coming to the site and then being redirected to yandex.com (some russian search engine). I have ran a virus scan on the site and it was clean. I ran a trojan scan and it can back with possibilities but nothing for sure. It only does it in firefox. It also pops up a malware issue for some users. I have tried refreshing my browser cache and it still does it. If you go to www.fvsports.com through firefox you will see what I am talking about. I have a deal open with my host, but if anyone here has a good idea of what it would be it would be greatly appreciated.

[apokphp]

With users that have firefox they are coming to the site and then being redirected to yandex.com (some russian search engine). I have ran a virus scan on the site and it was clean. I ran a trojan scan and it can back with possibilities but nothing for sure. It only does it in firefox. It also pops up a malware issue for some users. I have tried refreshing my browser cache and it still does it. If you go to www.fvsports.com through firefox you will see what I am talking about. I have a deal open with my host, but if anyone here has a good idea of what it would be it would be greatly appreciated.
Same thing is happening to my site as well.

What the hell is going on?

[benstillman]

<a href="http://www.vbulletin.com/forum/showthread.php?357006-My-site-redirects-to-yandex.com" target="_blank">http://www.vbulletin.com/forum/showt...-to-yandex.com</a>

[Marco van Herwaarden]

At vBulletin.com somone reports this is done in a modified functions_forumlist.php: http://www.vbulletin.com/forum/showthread.php?357006-My-site-redirects-to-yandex.com&p=2008127&viewfull=1#post2008127

Changed files usually indicate that the hosting account was compromised.

First step to take in a situation like this is look for changed files. This can be done from the AdminCP -> Maintenance -> Suspect File Versions.