Guys from Russian security firm GROUP-IB published screen shots of a famous banking trojan Carberp. The source code has been leaked to the public today on a Russian underground forum.
A couple of day ago it was possible to buy the source code for $5, 000.
The distributed archive contains the complete source code of all versions, Gazavar worm module, exploits for CVE-2012-1864 and CVE-2012-0217, bootkit: