The Internet oldest hacker group Rex Mundi was taken down supported by the Europol and the Joint Cybercrime Action Taskforce (J-CAT) The hacker group was active since at least 2012, they cracked into several organizations and blackmail organizations demanding ransom. Five people from the hacker group were arrested by French authorities in June 2017 and the main suspect admitted that he involved in blackmail but hired the services of a hacker on the dark web to carry out the cyber-attack reads Europol statement.”]