Not a Virus, of course you have no reason to trust me, I am some guy on the internet. Run it through an virus detector or something. Or use Linux like me and don't worry about viruses.
Sorry, I didn't mean it so mean like that. You only have a few posts so I'm a little wary of you at the moment. Just give it time and I might get to know you as such.
Which version and for what system? If it's a REALLY old one (i.e. first or second release) for Linux, then sure. Otherwise it's probably the same thing I have here.
I remember I used to cheat and self-vote my battery with a second account, then with both accouts down vote this other guy's one. I think he caught on and began doing the same though to me :P
It was fun though, and I remember I didn't realise that STNE was stone, so I called it "Shten", "sten" or "stienum" (sty-num).
On the minecraft forums, much later, I saw a topic called "powder reborn", I was filled with joy and began messing around with a plethora of new stuff immediatly :D