The Cybersecurity Group aims at devising novel methods to better understand and mitigate emerging threats in online communities. The group focuses on addressing real-world problems in three directions: i) Cyber-threats, ii) Cyber-fraud, and iii) Cyber-safety. First, we look at how malware spread through online markets, designing and developing new approaches to assist security analysts and end-users in the study of malicious or potentially unwanted programs. Second, we study the ecosystem that supports the development of malware as well as other computer-dependent crimes, including mass-marketing fraud. Finally, we look at ways in which we can protect users, especially minors, from malicious actions like cyberbullying or misinformation in online communities.