Police arrested four people and took down 100 servers across Europe and North America in what Europol said was the biggest sweep against malware ever conducted.

Police arrested four people and took down 100 servers across Europe and North America in a major sweep against malware, Europol said.

The European Union’s law enforcement agency also said over 2,000 domains were now under the control of law enforcement.

Operation Endgame, which was carried out between May 27 and 29, was “the largest ever operation against botnets, which play a major role in the deployment of ransomware,” Europol said.