The Ramnit botnet has been shut down in a joint effort by the Europol and the security firms Symantec, Microsoft, and Anubis Networks. The group behind the botnet seems to be active since 2010, but quickly evolved in the time thanks to continuous improvement. The operation shows the importance of international law enforcement working together with private industry in the fight against the global threat of cybercrime, said Europol Deputy Director Operations, Wil van Gemert. Ramnit is one of the world’s biggest botnets, which infected up to 3.2 million machines worldwide.”]
Source: https://securityaffairs.co/wordpress/34126/cyber-crime/europol-dismantled-ramnit-botnet.html