What the hell is a "threat actor"?
Why use jargon when "criminal" is a perfectly good word? And if this is a specific type of criminal, say a terrorist or a thief or the intelligence apparatus of a foreign country, then there are very descriptive and precise words for those as well. If it's corporate espionage, then "crook" works well, too.
Why do people who use technology feel the need to create neologisms for the most mundane things? Just the other day, I saw someone from a news web site refer to an "article" as an "explainer cardstack". I'm not shitting you. I immediately took that news source out of my RSS feed because if they're that dedicated to lexical obfuscation, I don't trust anything they write.
English motherfucker. Do you speak it?