Lockbit, the Russia-linked hacking group behind the attack on Royal Mail last year, has been targeted by the UK's National Crime Agency.
On Monday, the crime agency, in collaboration with the FBI and other international law enforcement, said it took control of Lockbit's services, compromising its entire criminal enterprise.
The hacking group became known as "the world's most harmful cybercrime group" after it used its ransomware to demand billions of pounds, dollars and euros from its victims.
Over its four years of existence, Lockbit targeted the likes of the Royal Mail, Boeing, fire alarm production company, Rex Group, and trade organisation, The Food and Drink Federation.
National Crime Agency director general, Graeme Biggar said: “This NCA-led investigation is a ground-breaking disruption of the world’s most harmful cybercrime group. It shows that no criminal operation, wherever they are, and no matter how advanced, is beyond the reach of the Agency and our partners."