Kim Jong Un’s cyberwarriors have been accused of causing huge disruption in recent years, including being blamed for the massive hack on Sony Pictures in 2014 and last year’s WannaCry ransomware worm, as well as umpteen attacks on South Korean servers.

Now it appears that North Korea has also been using previously-unknown holes in the Internet to carry out cyberespionage — the kinds of activities that could easily metamorphose into full-scale attacks, according to a report from FireEye, the California-based cybersecurity company.

Although the North Korean regime bans the internet for ordinary citizens and is decidedly behind the times with most technology, it has funneled a huge amount of time and money into building a cyberarmy capable of outsmarting more technicogically advanced countries like South Korea.