To put it in layman's terms 'subseven' and others like it are not classified as viruses. They are called rats, Remote Administrative Tools Services, to get a rat all sorts of pirated software and sharewares have rats (trojans) included in them, the software may be free but it comes at a price, once you install the pirated software/shareware the rat or trojan is piggybacked onto your system, once on your system and specially on highspeed connections you get pinged to see if your system has a rat installed, if you do have a rat installed your computer can be taken over by Remote Administrative Tools (hackers), this is how denial of service attacks are made, in certain cases the remote user (hack) can even see what on your screen and can get to some of your files, ect.. you know what im saying. Once a rat is installed, anti-virus programs simply see them as a official remote administrative tools, and since anti-virus companies don't want to piss-off companies who have the rats ligitametly installed by having the anti virus pop up everytime and everywhere, it's considered an official application and therefore not considered a virus or even scanned. There are two things you can do, one is to get a trojan scanner or just enable a firewall, I have NIS (norton internet security) so even if a rat would by chance make it's way into my system, the firewall would not permit that port to be scanned or opened. Just my opinion.
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