This. Chopping down a stop sign with an angle grinder is an easy terrorist feat but not one you hear about because nobody stands to gain anything.
When you can push a software payload that does the equivalent of cutting down tens of thousands of stop signs at once from an extradition-free jurisdiction, the calculus changes.
We're getting plenty of tastes of this with healthcare companies and hospitals being targeted with ransomware.
In an operation like this, you're most likely a government employee for a foreign power. Extradition is not one of your worries.