I don't doubt it, I take your word for it. But don't you think their are Russian, Iranian, Chinese, US, UK, hackers, and probably dozens more at the same thing?
On different scales, they don't all identify talent young and send them off to special state-run schools to train them.
The point I'm making is that US-NK relations are tense at the moment, is it any surprise that the incidence of news reporting on NK and its corrupt and threatening ways is increasing?
They've been tense for a long time, increased reporting is a more accurate measure of what the media believe their consumers want to see, hear, or read.