I'm always amazed that a country which refuses to properly educate its people in math and science is able to pull off technological feats such as jamming GPS and distributing malware.
That is interesting, I was under the impression the North keeps up education for a decent amount of its people. I thought they were one of those countries that forced its people into engineering and science as a facet of its national security policy.
Assuming that you are referring to the USA, our policy is to have by far the largest and most advanced military on the planet, with the ability to extend force to remote corners of the globe within hours. Also, our policy is to have a massive nuclear armament which can be used at any time to destroy any country or even the population of the entire planet. I don't think we need to be directing any more of our media studies graduates into the engineering just to help out our armed forces.
So when we have to buy all the electronics in them from China and have the software designed in India and we can't get them to any of the remote corners of the Earth because our schools have been teaching that the Earth is flat and was created in 4004BC
Neither of which is very difficult. Most likely they didn't write the malware - most malware distributors don't. And narrow spectrum GPS jamming is pretty straightforward (and not very useful unless your goal is to annoy civilians).
On to more complex things... how many medium range ballistic missile tests have they failed? They've been trying to extend seventy year old German technology (by way of Russia and China) for decades now without much success. That's not very impressive, IMO.