https://www.theregister.co.uk/2019/01/31/north_korea_joanap_botnet_fbi_warrant/

Uncle Sam has infiltrated and somewhat knackered what it claims is a North Korea-operated botnet of hijacked Microsoft Windows computers.

US prosecutors reckon Park Jin Hyok – a suspected Sony Pictures and WannaCry hacker living in Kim Jong Un's hermit nation – built and managed the Joanap botnet, a globe-spanning network of commandeered systems, and used it to launch further cyber-attacks on various targets.