Four people have been arrested in Ukraine and Armenia and more than 100 internet servers taken down or disrupted in a major sting operation targeting international cybercrime that has impacted thousands of people, Europol said on Thursday.
Carried out between May 27 and 29, the European Union's law enforcement agency called it "the largest ever operation against botnets, which play a major role in the deployment of ransomware".

One of the arrests was made in Armenia and the other three in Ukraine, Europol said, adding that more than 2,000 domains were now under the control of law enforcement.
Malware allows cybercriminals to secretly connect to people's computers for malicious purposes.
One of the main suspects earned at least 69 million euros ($75 million) in cryptocurrency by renting out criminal infrastructure sites to deploy ransomware, according to investigators.