I believe you, gotta test it now, fire in the hole!!!!
... Tried it and nothing special happened. Maybe it was not the last page I visited but something during the session. Ah! And behold, after Defender cleaned it, I got a scary "Svhost has stopped responding."
The nasty files went into the quarentine, and I deleted them, but after about 5 minutes the same warnings came back! Not happy :/
Now running Antimalware full check....