Tom Grasso, unit chief of the FBI’s cyber division, took the Black Hat stage to discuss the processes and partnerships leading up to the massive Avalanche takedown in December 2016. Avalanche was an infrastructure for enabling botnets, created by two administrators and active since 2010. The multiered network of servers was used to spread malware campaigns, facilitate “money mule” laundering schemes, and act as a fast-flux communication infrastructure for other botnets. Avalanche affected more than 500,000 systems and caused hundreds of millions of dollars in losses.”]
Source: https://www.darkreading.com/attacks-breaches/fbi-talks-avalanche-botnet-takedown