Well this was pretty much expected. I think that it could be called a wallet/address hijacker. This tells us that Bitcoin has been really growing. It is getting attention even from the hacking community.
This shouldn't be a surprise to anyone and besides there is more sophisticated software being used ever on Bitcoin. I'm not sure if you're up to news with the recent hack on The Hacking Team, that was selling malware and whatnot to the governments?
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