Good bye threat hunting configs and filters of the past. Microsoft introduced Windows Terminal and there is no way back.
While reading its actual source code today I noticed quite a lot of familiar code (I did poke around in conhost.exe code with Ida before), but then I stumbled upon an interesting bit that this post is all about.
The following command:
conhost.exe notepad.exe
doesn’t do anything on older version of Windows 10. However, the latest version (tested on 18363) has a little LOLBINish surprise:

So… go back to your config and remove filters on conhost.exe. Remember, hate the message, not the messenger 😉