Wow. Awesome find! And I thought that Symantec Heuristic Scan was voodoo. Ok maybe I still do!
I would be interested in hearing more about how this "Sinkhole" mechanic works.
CPU Bitcoin mining has gone the way of renting DVDs at Blockbuster. I supposed the totality of 1.9 million slaves CPU mining Bitcoin would probably not be more a few terahash. At the current rate a terahash yields a little less than $500 a day.
Now if he were mining scrypt...