What you describe is very similar to "Warden", Blizzard's anti-cheat system. I'm not sure how up to date this article is but it talks about how it works and app

What you describe is very similar to "Warden", Blizzard's anti-cheat system. I'm not sure how up to date this article is but it talks about how it works and approaches to working around it https://hackmag.com/uncategorized/deceiving-blizzard-warden/ https://hackmag.com/uncategorized/deceiving-blizzard-warden/