botmaster

Someone who remotely controls one or more botnets (a set of exploited
computer systems) via the internet, typically via a simple interface
such as IRC chat. They may then rent out the ability to conduct various
nefarious activities, such as DDoS attacks, on the black market.
Botmasters can also be government agencies conducting various kinds of
cyberwarfare or astroturfing propaganda campaigns in a thin attempt to
legitimize their authority and influence the popular psyche.