This is one I haven't heard of despite searching.
One [reputable] website (http://eaaforums.org
). Main site loads fine, but when I click on the link for any of the subforums there, I get redirected to an ad site for viagra, etc. The weird thing is that it doesn't happen on any other sites (that I've found), just that one, so for a couple of days I thought it was their website that was hacked. The URL in the address bar is showing the page I should be on.
I've never heard of a redirect trojan/virus that only redirects certain sites.
I'm using Firefox, and for years I've used Proxomitron. For those not familiar with Proxomitron, it's a web proxy filter for ad blocking and other useful things. You configure it to listen on a port (by default, 8080), then configure the browser to use a proxy server at localhost:8080. Never had a problem with it before.
My hosts file is also clean.
If I go into the brower's (FF or IE) settings, and set it to not
use a proxy server, everything is fine, no redirects. So apparently something else is also intercepting traffic from the browser to port 8080, but I can't find what it is.
I've tried TDSSkiller, Malwarebytes, and have Avast antivirus running, but they don't help. One thing I didn't try, but will tonight, is to use a different port for Proxomitron (I did try 8081 which still has the problem, but I'll try something way different like 30000).