U.S. and Canadian authorities arrested and charged a Canadian man with operating the KimWolf distributed denial-of-service (DDoS) botnet, which infected nearly two million devices worldwide.

23-year-old Jacob Butler (also known online as “Dort”) was arrested by Canadian authorities in Ottawa on Wednesday pursuant to an extradition warrant.

According to a criminal complaint unsealed on Thursday in the District of Alaska, Butler was taken into custody based on IP address and online account information, transaction records, and online messaging records that exposed his links to the KimWolf botnet.