The U.S. Department of Justice and Canadian authorities announce the arrest and charging of a Canadian man accused of operating the Kimwolf distributed denial-of-service (DDoS) botnet. Multiple outlets report that Jacob Butler, 23, of Ottawa, Canada—also known online as “Dort” and “Dort” in court filings—has been arrested in Canada under an extradition-related warrant after U.S. prosecutors filed criminal charges. Authorities allege Kimwolf is an IoT-focused botnet that infects large numbers of internet-connected devices and is used to carry out DDoS attacks “for hire.” Reporting varies slightly on scale, but sources consistently describe millions of infected devices, including at least around one to two million. Some coverage also describes Kimwolf as a variant of the AISURU botnet. Krebs on Security adds that the suspect is accused of building and operating the botnet and notes criminal hacking charges in both the United States and Canada. The case centers on the development and operation of the botnet and its use to generate DDoS traffic against targets over a period described as roughly the past six months.