Robuta

https://www.scrippsnews.com/world/gchq-team-launched-cyberattack-on-hactivist-groups
A special team within the GCHQ launched a cyberattack against hacktivist groups according to documents leaked by Edward Snowden.
british intelligence agencytargetedhacktivistgroupsvideo
https://thehackernews.com/2014/02/british-intelligence-agency-ddosed.html?m=1
GCHQ unit known as the Joint Threat Research Intelligence Group (JTRIG) DDoSed Anonymous and LulzSec Chatrooms to disrupt communication
british intelligence agencyanonymouschatroomsdisruptcommunication