
Run by a shadowy figure known only as 'Flyman', RBN has been associated with a number of high-profile online crimes committed in the UK.
Security firms have linked RBN to child pornography, corporate blackmail, spam attacks and online identity theft, according to a report in Times Online.
"The UK has been a focus for this group and its criminal clients, and things are set to get worse," said David Perry, an analyst for Trend Micro.
The US Treasury estimated recently that cyber-crime is now worth $100bn a year, more than the illegal drugs trade.