It's just too bad the country's intranet is (supposedly) airgapped from the internet. So they can't actually deliver any propaganda to North Korean subjects without assistance from someone on the inside.
Hmm, so perhaps the best, most damaging attack on them would be to attack their NOC, and open up their routing to the rest of the world. At some point they have a filter in place - if you we're to quietly remove hat filter, how long would t take them to figure it out?
Academics in North Korea apparently are trusted with some access to the Internet at large, so there is a route.
It seems that internet access from within the country is extremely limited, and the only people who have it are people already in positions of political power, who would stand to lose, not gain, from a revolt. Hackers could conceivably penetrate NK's NOC and seize control of it, but it wouldn't do much good since such a tiny number of people even connected to it at all, and those are the people who are already trusted and allowed to see the internet.
Meanwhile, most people in the country don't have any kind of access to computers, and most of those that do, can only access the country's (allegedly air-gapped) intranet, which cannot be attacked unless someone inside the country physically connects it to the internet.
