All young men in their twenties, Klepikov, Bron, and Penchukov were a group in Evgeniy Bogachev's (Slavik's) inner ring of organised cyber-crime.
A variant of Bogachev's infamous "Zeus" malware, "Jabber Zeus" came with the instant-messaging plug-in Jabber, which allowed the group to coordinate their attacks.
According to a Wired report, Penchukov ("tank") led the group, Klepikov ("petr0vich") ran IT management, and Bron ("thehead") moved the gang's money internationally.
The FBI raided Penchukov and Klepikov's homes in 2010, seizing 20 terabytes of data.