The course provides students with an understanding of the structure of cybercriminal operations, and of the threats linked to cybercrime. The lectures will cover the different types of cybercriminal operations, the techniques used by miscreants to exploit and take advantage of Internet users, the different actors that are active in the online underground economy, and the technical and legal issues faced by law enforcement to take down cybercriminal operations. Through the analysis of multiple case studies, the students will learn to analyze complex cybercriminal operations in detail, and identify weak points in such operations, which can be leveraged for takedown purposes. The students will then learn how to develop effective mitigation techniques to disrupt cybercriminal operations.