Ransomware is one of the most prolific and economically damaging cybercrime threats of the contemporary era. This paper examines the evolution and activities of ransomware criminal groups. Results reveal the most active ransomware criminal groups, the median range of their careers and the most targeted victim organisations by country and sector type.

This report presents the findings of a study into co-offending using arrest data from Melbourne, Australia. The study sought to extend previous work on co-offending by analysing the range of crime types committed by individuals and co-offenders across co-offending networks.