Since IRC networks require low bandwidth and use simple methods for communication they have been also used to host botnets and are tend to simple in construction and have been used many times for coordinating DDoS attacks or spam campaigns while switching channels to avoid being taken down.
Since IRC networks require low bandwidth and use simple methods for communication and are tend to simple in construction and have been used many times for coordinating DDoS attacks or spam campaigns while switching channels to avoid being taken down. They have been also used to host botnets communication.