Though Skynet would put it in there given a chance - engineer backdoors into stuff at the hardware level for it to for propagating itself.
By the time a general-purpose AI gets smart enough to hack our EDA software to engineer in backdoors into the chips it produces without us even noticing, I think we'll already have bigger problems to worry out!
There was a TV series, a couple years ago, that painted a scenario where a rogue AI hacked Alexa and surveillance networks, and simply used social engineering to make people do its bidding. It's a little bit sensationalist, but it pretty effectively shows how much damage an AI (or hackers, or a hostile government actor) can do by exploiting our
existing systems. If that sounds interesting, then you'll probably find it worth watching.
Next: Created by Manny Coto. With John Slattery, Fernanda Andrade, Michael Mosley, Gerardo Celasco. A former tech CEO joins an FBI Cybersecurity Agent to stop the emergence of a rogue Artificial Intelligence.
www.imdb.com