The US Department of Justice (DoJ) has just announced the disruption of an active botnet and the arrest of its alleged operator.
A botnet, as you probably know, is a "robot network" - a collection of computers in homes and offices around the world that are infected by malware that allows an operator, known as the botherder, to take control of those zombie computers from afar.
And a takedown is when law enforcement, often with the assistance of ISPs and security researchers, infiltrates the botnet in order to reduce the harm it can do.
Continued : https://nakedsecurity.sophos.com/2015/10/15/dridex-botnet-taken-down-multi-million-bank-fraud-suspect-arrested/
Related: Law Enforcement Shuts Down Dridex Operation