Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-06 02:08:30 UTC Unknown group: Kumsong121 Names Kumsong121 (ESRC) Country North Korea Description A threat actor mentioned in a summary report only, so we don't know who they are yet. Information Last change to this card: 02 November 2021 ↑ Source: https://apt.etda.or.th/cgi-bin/showcard.cgi?u=accadf97-a8c7-4d2d-88cb-26a733a466ea https://apt.etda.or.th/cgi-bin/showcard.cgi?u=accadf97-a8c7-4d2d-88cb-26a733a466ea Page 1 of 1