Disrupting an Adware-serving Skype Botnet

In the early days of malware, we all remember analyzing samples of IRC botnets that were relatively simple, where the malware would connect to a random port running IRC, joining the botnet and waiting for commands from their leader. In this day and age, it’s slightly different. Whereas botnets previously had to run on systems that attackers owned or had compromised, now bots can run on Skype and other cloud-based chat programs, providing an even lower-cost alternative for attackers.