Canadian authorities have arrested the alleged operator of the Kimwolf DDoS botnet, who is accused of running a DDoS-for-hire service. The arrest marks another enforcement action against so-called "booter" or "stresser" services that allow users to launch distributed denial-of-service attacks against websites and online services. DDoS-for-hire operations have become a persistent problem in cybersecurity, as they lower the barrier for launching disruptive attacks by making the tools available to anyone willing to pay.