The DPRK isn't run by an organized crime organization, but many people have made the comparison because the leadership is primarily concerned with staying in power and making money.
What's the difference between your average Warsaw Pact "communist" regime, where only lip service is paid to the discredited communist ideology, where unfairly aquired wealth is the only incentive the party can provide to its members, where opposition figures routinely experience unfortunate "accidents" or suddenly "commit suicide", and a mafia?
How about Cuba under Batista?