Fake Windows 10 Desktop Used in New Police Browser Lock Scam

2 Mins read

Scammers have taken an old browser scam and invigorated it using a clever and new tactic that takes advantage of your web browser’s full-screen mode to show a fake Windows 10 desktop stating your computer is locked.

This type of scam is called a police browser locker. which pretends to be law enforcement locking your browser because due to illegal activity. These scams then state that if you pay a fine via a credit card, it will unlock your computer so you can use it again.

These types of scams are normally easy to detect as they utilize fake and suspicious URLs and allow you to use other apps on your computer even if the browser is locked.

Overlaying a full-screen Windows 10 Desktop image

To make it harder for users to identify these types of scams, attackers are tricking web users into visiting fake sites that display a full-screen image of a Windows 10 desktop with the Chrome browser open.

These fake Windows 10 desktop images will fill up the entire screen and pretend to display the web site for the country’s local police force. As the attackers are just displaying an image, they can also display the legitimate government URL to make it more convincing.

These fake web sites state that the police locked the user’s computer for conducting illegal activities such as viewing and disseminating pornographic images of children, zoophilia, and rape. Victims are then prompted to enter their credit card details to pay a fine of approximately $800.

When displaying these screens, the scam will show different law enforcement web sites and languages depending on the URL visited or possibly what country you’re from.

Malwarebytes who first posted about this new technique saw this scam targeting web users from Qatar, UAE, Oman, Kuwait, and France.

For example, below is some of the text shown in the UAE variant of this scam.

“Your browser has been locked due to viewing and dissemination of materials forbidden by law of [country], namely pornography with pedophilia, rape and zoophilia.

In order to unlocking you should a [amount] [currency] fine with Visa or MasterCard.

Your browser will be unlocked automatically after the fine payment.

Attention! In case of non-payment of the fine, or your attempts to unlock the device independently, case materials will be transferred to [police_force_name] for the institution of criminal proceedings against you due to commitment a crime.”

If you enter your credit card details into this form, the attackers will automatically steal the payment information, which will then be sold online at underground criminal forums or used by the attackers for fraudulent purchases.

This tactic makes the scam more convincing

What makes this new variant of the police browser locker so clever is that when the image is shown by the browser in full-screen mode it overlays the entire screen, including the normal Windows 10 desktop.

This could cause users to think that the fake Windows 10 desktop image is their normal desktop. The difference, though, is that clicking on the Start Menu, closing apps, or starting new ones will not work.

What will be usable is an overlaid credit card form, which could make some users think that law enforcement has locked their computer until a fine is paid.

It is important to know that law enforcement will never lock your browser like this and then demand a fine be paid online.

If you ever see a message on your screen like this, press Alt+Tab to see if you can get back to your normal desktop or press Ctrl+Alt+Delete to open the Task Manager and terminate any browser processes.

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