North Korean cybercrime group controlled by the Reconnaissance General Bureau (RGB. KPe.031). "According to a cybersecurity firm, “Stonefly is believed to specialize in mounting highly selective targeted attacks against targets that could yield intelligence to assist strategically important sectors such as energy, aerospace, and military equipment. Virtually all of the technologies it appears to be interested in have military as well as civilian uses and some could have applications in the development of advanced weaponry”."