North Korea relies heavily on American technology despite being the one of the US’s most staunch opponents.

There is an “overwhelming presence of American hardware and software on North Korean networks and in daily use by senior North Korean leaders,” Recorded Future, a threat intelligence firm, said in a recent report. This is despite a prohibition on US trade with the communist government because it is a sponsors of international terrorism.

North Korea has been a major force behind technological threats, including malware attacks, in addition to a steady stream of military threats against the US. For example, malicious cyber activity was cited in a joint Department of Homeland Security (DHS) and FBI alert last week.