FBI Says It Dismantled 'Likely the World's Largest Botnet' ( www.bankinfosecurity.com )
US-Led Operation Disrupts 911 S5 Botnet in Global CrackdownFBI Director Christopher Wray said the U.S. led an internationally coordinated effort to disrupt and dismantle what may be one of the world's largest malicious botnet services, which had accrued 19 million IP addresses by the time it was taken down and its primary administrator was arrested in May.
