Mirai botnet has been used in some of the largest and most disruptive distributed denial of service (DDoS) attacks. Two hackers have begun advertising their own DDoS-for-hire service, built on the Mirai malware. The two claim to be in the control of a Mirai Botnet of 400,000 devices, albeit we couldnt 100% verify its the same botnet observed by 2sec4u and MalwareTech. Mirai is malware which turns computer systems running Linux into remotely controlled bots, that can be used as part of a botnet in large-scale network attacks.”]
Source: https://gbhackers.com/you-can-take-mirai-botnet-of-400000-bots-for-rental/