ISIS would probably because I feel like they have a larger force to call from. Remember, ISIS isn't limited by social, economic, or national borders; they're an extremist religious movement which means they -could- have followers from all over the world.
That said, they're terrorists and I hope those goat fucking towelheads eat cow cock laced with ricin because they fucking suck.
Well counting that North Korea has been at war for over 50 years now I would expect it to be more than prepared to deal with ISIS and they probably have more developed weapons than ISIS has access to
They've technically been at war for over 50 years (because no peace treaty has been signed) but I don't think there have been active hostilities for a while.
That said, they're terrorists and I hope those goat fucking towelheads eat cow cock laced with ricin because they fucking suck.