In 2021, Europol’s experts worked with international law enforcement and a cybersecurity company to target one of the most notorious cybercrime groups, REvil. REvil used a ransomware-as-a-service business model to generate profits. We hear from one of Europol’s cybercrime specialists, a member of the Romanian Police and a cybersecurity engineer from Bitdefender on how law enforcement dealt with this cybercriminal network.