An automated searcher, constantly scouring the internet for these nasty little thieves, with their fake Microsoft pop-ups. The pop-ups aim to get the user to click on the viewport of the browser, which triggers an alert tone, fullscreens the webview, and hides the mouse. This forces the victim into calling the number on screen. Top tip: You can just press or hold "Esc" on your keyboard to get rid of these!
This list is available at https://cretin.org/hourly.txt.