What's Behind the Lazaruth Group?

The lazaruth group is the umbrella term for ol ive north curean hackers. They're very highly funded by the north creen regime and are trained by the government. I feel like there's this really interesting tension here where north grea is obviously an isolated country, and as you wrote in one of your papers,. Seems to have sort of underestimated their ciber capabilities. May because of that, how did they get so good at hacking?