Silent Chollima

SILENT CHOLLIMA is a Democratic People’s Republic of Korea (DPRK)-nexus adversary that has been active since at least 2007 and likely operates in support of Bureau 121 of the DPRK’s Reconnaissance General Bureau (RGB). Early operations demonstrated both destructive and espionage components; however, SILENT CHOLLIMA’s mission appears to have changed in 2015 following a significant reorganization of...