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.
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.