Vast Spy System Loots Computers in 103 Countries
nytimes.com
nytimes.com
Control of the botnet from one particular country would be persuasive evidence of some involvement by persons in that country. The article does note that more follow-up investigation is needed.
Hedging your bets?
I am curious to read more of the report...
Or maybe I am jumping the gun: "researchers' findings... due to be released this weeekend."