Twittor is a tool open source that was designed by the London-based researchers Paul Amar to control botnets via Direct Messages. Attackers can set up a network of fake profiles on a social network and use them to post a specific set of encrypted commands to the malware. The use of social networks such as Facebook and Twitter as C&C makes it hard to detect botnet activities. The tool is open source and it is available on GitHub, and Amar is inviting developers to contribute to the project.”]
Source: http://securityaffairs.co/wordpress/42000/cyber-crime/twittor-tool-twitter-botnet.html