In addition to WowMatrix, Apple's download lists this:
http://www.apple.com/downloads/macos...installer.html
The author for this is linked to some defunct MobileMe account. There's confidence for you.
And following the instructions above, I found an app that
proudly announces it is a Bot, and tells you in clear terms that if you get caught, you're hosed. Oh, and it asks you for your admin password when installing, apparently. It does have the function your friend mentions, along with many others (including playing the game for you).
So.. do be careful not to take anything from said friend, lest you get caught up in the money laundering and go down with him..
Edit: Damn, I take too long to type. Or type too much. Or something.