https://www.bleepingcomputer.com/news/security/hackers-deploy-ai-written-malware-in-targeted-attacks/ This was the giveaway:

@krypt3ia People: AI malware is going to kill us all!

The AI writing the malware: Here, let me make sure to comment my code for you.

@krypt3ia Hahahaha, gg bad guys.

@krypt3ia How long until it's assumed that anyone who uses complete sentences, capitalization, and punctuation in chat is a bot?

@krypt3ia Dammit. I guess that explains why I struggle so much with CAPTCHAs.