Leonprous Pop-up Virus — How to Remove Unwanted Ads?

Leonprous.com pop-ups that you can see while surfing the Web are the result of a malware infection that resides within your browser. Such pop-ups emerge in excessive quantities, disrupting and bothering you.

The vast majority of the pop-ups from Leonprous.com site are irrelevant, as it presents any advertising content it receives a contract for. Given that a large number of pages promoted in this fashion are not legitimate, it is obvious to expect them to feature dangerous content. In particular, they can expose you to different forms of web deceptions.

What are Leonprous pop-up advertisements?

By certain characteristics, Leonprous.com pop-ups are similar to standard pop-ups you may encounter on common websites. However, all the distinction – and malignancy – originates from this exact website. Pages like Leonprous are frequently created with only one purpose – to present unsuspecting people to enable pop-ups and then start spamming them.

Brief description of the Leonprous.com pop-ups:

Ads by the Leonprous.com site are not legit either. At best, those will be completely unrelated banners, that will still be annoying taking into account their frequency. However, more frequent cases include advertisements of obscure deals with 90% discount, adult sites ads or phishing attempts. Here are some of the classic patterns for pop-up spam:

• You have a new message on Facebook/Twitter/WhatsApp *link to a phishing copy of the site*
• There are 5 (10,20,50) women near you that wish to chat with you
• Collect your 90% discount coupon on this new, totally not scam shopping site
• Get a huge crypto bonus for signing in on this new crypto exchange website
• Your PC is infected with 15(any number up to 100) viruses, scan your system urgently/contact our tech support
• Use this extremely effective system cleaner to speed up your PC

Due to the illicit marketing model of Leonprous.com, no legitimate companies will really utilize their advertisement services. Instead, the whole array of topics I’ve delineated above is handled by the same deceitful actors as those who are behind Leonprous. Occasionally, upon clicking to the push ad, you might be redirected to another page that proposes activating pop-up advertisements. The activity of several sources of pop-ups can transform your web browser into an avenue of a pop-up surge.

Where did Leonprous pop-ups come from?

The main and most widespread approach to access the pop-up spamming site is to navigate through content on warez sites, pages containing pirated content, and the like. The persons responsible for such uncertain venues aim to compensate for expenses via redirects, often as a advertising maneuver. This type of redirection is commonly known as an “anti-bot verification”.

An extra plausible source of pop-up advertisements is adware, currently active inside your system. It changes browser settings in a way so it begins displaying Leonprous pop-ups without your consent. However, this circumstance is relatively infrequent, as such malware employs its own, more efficient approach to showcasing advertisements.

Are Leonprous pop-up notifications dangerous?

Yes, they are. Initially, they can look non-threatening – just a blinking pop-up that appears from time to time. However, the things this window promotes differ drastically from what you used to see in pop-up advertisements. Leonprous.com site is controlled by fraudsters, who deliberately show hundreds of irrelevant ads in pop-ups. They also don’t follow any common sense and can launch sporadic pop-up notifications into a storm of promotions. For weak systems, that may be enough to make the system slower. But problems are not over at this point.

As any other thing related to illegal ads, Leonprous pop-up ads don’t have legit offers. Even when hackers make the banners similar to ones from Amazon, Walmart or Ebay, the web page these ads will throw you to are completely different. And these pages may offer you to turn on other pop-ups, install a “useful” program, or pay for a thing at a big discount and never receive it. Let’s leave aside the cases when pop-up advertisements promote phishing pages or straightforward malware. There’s no way these pages will bring you any good, thus interacting with them is a very bad idea. For the same reason, Leonprous push notifications are not recommended to click on either, and the best solution is to disable them as soon as possible.

How to remove Leonprous pop-ups?

Reset your browsers manually

To reset Edge, do the following steps:

1. Open “Settings and more” tab in upper right corner, then find here “Settings” button. In the appeared menu, choose “Reset settings” option:

2. After picking the Reset Settings option, you will see the following menu, stating about the settings which will be reverted to original:

For Mozilla Firefox, do the next actions:

1. Open Menu tab (three strips in upper right corner) and click the “Help” button. In the appeared menu choose “troubleshooting information”:

2. In the next screen, find the “Refresh Firefox” option:

After choosing this option, you will see the next message:

If you use Google Chrome

1. Open Settings tab, find the “Advanced” button. In the extended tab choose the “Reset and clean up” button:

2. In the appeared list, click on the “Restore settings to their original defaults”:

3. Finally, you will see the window, where you can see all the settings which will be reset to default:

Opera can be reset in the next way

1. Open Settings menu by pressing the gear icon in the toolbar (left side of the browser window), then click “Advanced” option, and choose “Browser” button in the drop-down list. Scroll down, to the bottom of the settings menu. Find there “Restore settings to their original defaults” option:


2. After clicking the “Restore settings…” button, you will see the window, where all settings, which will be reset, are shown:

When the browsers are reset, you need to ensure that your browser will connect the right DNS while connecting to the site you need. Create a text file titled “hosts” on your pc’s desktop, then open it and fill it with the following lines²:

Find the hosts.txt file in C:/Windows/System32/drivers/etc directory. Rename this file to “hosts.old.txt” (to distinguish it from the new one), and then move the file you created on the desktop to this folder. Remove the hosts.old from this folder. Now you have your hosts file as good as new.

Scan your system for possible viruses

Once the scan is complete, you will see the detections or a notification about a clean system. Proceed with pressing the Clean Up button (or OK when nothing is detected).

1. Official Microsoft guide for hosts file reset.