I heard an interview on John Batchelor with the author of a book on the “super-hackers” who had broken into just about every government and financial computer system. The author said that the hackers didn’t go into Russian systems because the Russians had made it very clear that such an attack would result in death, no matter who or where.
A summary of the interview is here: http://johnbatchelorshow.com/jb/2012/01/darkmarket-for-all-2012/