How is NK developing some advanced weaponry despite being so heavily sanctioned? Their missile program is clearly ahead of Iran's and Pakistan's and even India's. Possibly, drones as well.
Or Russia could just violate the UN ban outright just as USA does.Like I said Russia should just dump all their old Project 877 submarines into North Korea. Then North Korea could refurbish them.
Just do like the US does, claim you are exporting ship scrap to North Korea, and then the North Koreans upgrade it and voila instant fleet.
This way no "weapons" are being exported against the UN ban.