"Pariah", they've had the longest embargo on earth (which has caused hundreds of thousands of deaths), they had 90% of their whole countries infrastructure bombed by the US, and the Korean war has been called a genocide in the North by many scholars.

The world doesnt make sense if you ignore history.

They probably hack for the same reason the west does it: attack/defense and money.

What other options do they have? They've been sanctioned to the point where they have few options left but to turn to crime.