Sappropsi.club is a fraudulent website designed to propagate a browser-based tactic that generates monetary gains for its creators by pushing unwanted advertisements to the unsuspecting users who fall for it. The scheme's crux is to employ social-engineering tricks that attempt to persuade any visitor landing on the website into subscribing to its push notifications. While some of the myriads of websites dedicated to this tactic choose to deviate from the most popular methods, Sappropsi.club is not one of them.
When users land of Sappropsi.club, they will see a fake error message that masquerades as a bot captcha check. The text of the message is 'Human Verification Click Allow to confirm that you are not a robot!'. Clicking the 'Allow' button, however, has no such functionality. Instead, users will have granted the website the required permissions to start pushing unsolicited advertisements to the affected device's screen. The advertisements may include adult websites, fraudulent online casinos, game sites or suspicious software updates.
It is not a recommended move to click on any of the generated advertisements. What affected users should do is open the settings menu of their respective browser, scroll down to the permissions tab, and revoke anything associated with Sappropsi.club.