This is my presentation from Source Dublin 2014 on cyber crime and social media. Social media networks provide individuals and businesses with exciting opportunities to communicate and collaborate with others throughout the world. But with these opportunities come a number of security challenges and risks. This talk will outline how social media networks can pose various threats to businesses, from information leakage, reputational damage, to social engineering profiling, and vectors for enabling compromise of corporate systems. Social media networks also enable the rapid dissemination of news which in the event of an information security breach could either save or destroy an organisations reputation. Understanding and dealing with these challenges will enable companies to like and favourite social media networks in a secure way.