A cybercrime operation that stole banking information by hacking more than 3 million computers in Indonesia, India and other countries has been disrupted by European police with assistance from three technology companies, officials said on Wednesday.

The European Cybercrime Centre at Europol, the European police agency, coordinated the operation out of its headquarters in The Hague, targeting the so-called Ramnit botnet, a network of computers infected with malware.

Working with investigators from Germany, Italy, the Netherlands and Britain, it was assisted by AnubisNetworks, a unit of BitSight Technologies; Microsoft Corp. and Symantec Corp. in dismantling the server infrastructure used by the criminals, Europol said.