also, Pervade...
https://www.vice.com/amp/en/article/newd88/this-uk-company-is-making-it-easier-for-private-companies-to-hack-back
"For a fee, one organization will provide a system that detects and can hit back at hackers with its own arsenal of attacks. But this isn't some anonymous group on an underground crime forum. Instead, Pervade Software, a legitimate and public facing information security business based out of Cardiff, Wales, sells a platform designed for private companies to retaliate against hackers with DDoS and other digital attacks."