Cybercrime perpetrators are as diverse and complex as the cybercrime that they commit. For example, they come from different backgrounds and have different (egotistical, technical, monetary, ideological, political, professional, vengeful, sexual or other) motivations. They may or may not be professional criminals, and individuals or part of organised groups or networks (example of Advanced Persistent Threats). Some may commit crime on their own account or make their services available to others, and some may be supported by or be state actors. A better understanding of the types of perpetrators and their motivations and techniques can be instrumental for the prevention of cybercrime and for a more effective criminal justice response. The aim of this workshop is to contribute to such a better understanding and to initiate steps towards a typology of offenders.