Law firms were among the 40,000 victims of a crime gang which used malware to steal $100m (£77m).
A complex police operation conducted investigations in the US, Bulgaria, Germany, Georgia, Moldova and Ukraine, the BBC reports.
The gang infected computers with GozNym malware, which captured online banking details to access bank accounts.
The gang was put together from criminals who advertised their skills on online forums.
Ten members of the network have been charged in Pittsburgh, US on a range of offences, including stealing money and laundering those funds using US and foreign bank accounts.
Five Russian nationals remain on the run, including one who developed the GozNym malware and oversaw its development and management, including leasing it to other cyber-criminals.