Something interesting happened to me yesterday. While at work, an SMS beeped in to my mobile, from my ISP. Reading: "Your internet access has been restricted due to suspicious and irregular traffic."
Oh crap. Have they started cracking down on filesharing all of a sudden? They've always been pretty cool about that before. So I phoned them up immediately of course. The guy I spoke to said that they've noticed a lot of traffic going out to other computers, that appears to be like that of a spambot. So they'd blocked my computer from accessing SMTP and FTP servers. So I explained that that's not very likely, that I got a pretty up to date virus-checker (Avast) and shouldn't be able to be infected with such things. And then I flat out told him that I'm a filesharer, using torrents quite a bit. So that there's traffic going out to a lot of other machines isn't strange at all. His response? "Ah, cool. I'll just remove the block then."
Did not bat an eyelid. I love my ISP.
Anyhow, when I got home I did think that I hadn't scanned my computer for malware in a while, and might as well go ahead and do that just to be safe (the guy I spoke with had asked me to do that as well). So I fired up Ad-Aware.
"The currently installed definitions are 241 days old, would you like to update them?"
Er..oops. Ok I guess.. *click*
So, some updating and a scan later, I was staring at the result in disbelief. "found 1 W32.trojan.spambot"
I hate spammers. With a passion. I think there should be a special place in hell reserved for spammers. A very special place. And now one of the bastards has been using MY comp to spread their crap around, just because I got lazy with protecting myself from it.
This is going to give me nightmares for half of an eternity, I just know it. Don't start trusting that your virus-scanner and firewall will stop everything (though you'd think they would, wouldn't you?), and forget to scan your computers for this crap every now and then. Apparently it's as important as it ever was.