Weknow.us Redirect Virus – How to Remove It (Mac)

Weknow.us Redirect Virus – How to Remove It (Mac)

This post has been made to help explain what is the Weknow.us browser hijacker and how you can remove it effectively from your Mac.

The weknow.us domain is the type of hoax search page often used by browser hijacker apps, that may be unknowingly installed on your Mac. These types of unwanted software are often used to display third-party advertisements and perform browser redirects that lead you to third-party sites, most of which are very dangerous. Since this is the main risk associated with Weknow.us browser hijacker, many security researchers recommend to remove this software from your browser and Mac. To learn how to remove Weknow.us hijacker, we recommend that you read this article thoroughly.

Threat Summary

TypeBrowser Hijacker for Mac OS
Short DescriptionAn ad-supported app that may change the settings on the affected Mac’s web browsers and display it’s own search engine in order to lead victims to other third-party sites.
SymptomsThe victim may be led to different third-party websites.Various types of advertisements may start appearing on the victims’ Macs. Decrease in performance of the system.
Distribution MethodVia bundling or websites.
Detection Tool See If Your System Has Been Affected by Weknow.us


Combo Cleaner

User ExperienceJoin Our Forum to Discuss Weknow.us.

Weknow.us – Update 2019

Weknow.us has continued to spread on multiple different operating systems and web browsers alike. The suspicious software was recently reported by IT experts whose customers have had problems with Weknow.us. The reports indicate multiple threats and even after the removal of those tens of threats using anti-malware software, the home pages of the victimized computers were not changed. Victims have reported that the Weknow.us not only targets Mac computers, but the program also attacks system preferences on the following web browsers:

  • Safari.
  • Chrome.
  • Mozilla Firefox.
  • Opera browser.

In addition to this, the Weknow.us is the type of software, whose primary purpose is to prevent you, the user from removing it’s page. To do this, the browser hijacker creates multiple System Preferences profiles, which change a lot of different settings. The hijacker is so invasive, that even if you type in your URL box and finish typing and leave the URL box without anything typed in it, the URL automatically redirects back to weknow.us web page. Another situation is that when victims tried removing the entire cache, settings and folders from their Program library, it still had no effect in removing it. According to experts, there is another adware that is also related to Weknow.us and is distributed in combination with it. The variant is a family of viruses, called CrossRider, which we first spotted back in 2015. In most situations this adware is usually included in freeware applications that you may have installed unknowingly on your computer. This Crossrider adware application may introduce cookies and other tracking technologies on your computer, that may see what you are doing. It may also flood your computer by generating a lot of pop-up ads. Finally, it may lure you into visiting a suspicious web page, with the aid of the Weknow.us domain, that may not only slow down your computer, but may also be outright malicious for it.

Even though some users have reported to visit their User Library folders of Chrome and Safari web browsers, the threat has still remain persistent via their browsers’ behaviour.

Weknow.us – How Did I Get It

Weknow.us is a domain that is linked to a browser hijacker. There are different ways of distribution in relation to it. One of the main methods of being replicated is to be spread via bundled installers of other free apps you may have downloaded from third-party sites. These apps may replicate the Weknow.us browser hijacker by adding it’s main components in the installer and masking them “As a free extra” or “optional offer”. Usually the user is notified of that, but the notification step is very difficult to be found, since it exists well hidden in the “Advanced” or “Custom” installation modes.

In addition to this, the Weknow.us browser hijacker can also be added to the victim’s Mac by being added in the form of a browser extension or any form of toolbar and add on.

Weknow.us – Activity and Purpose

Once your Mac becomes affected by this browser hijacker, you may start to automatically see it’s main home page, because it is changed as a default on on each and every browser you have installed. It looks like the following:

The page itself is made to imitate Google and does a good job of doing that, however, unlike Google and any other legitimate search engine, this page does not have HTTPS security, meaning that it can be modified to not only collect data but even be malicious.

Furthermore, the Weknow.us web page is also related to another well-known domain –

Our in-depth Weknow.ac redirect removal guide explains in detail how victims can restore their browsers get rid of the virus infection
weknow.us and these types of web pages use an extensive amount of cookies to track user information

The main idea of programs, like Weknow.us is to obtain different information from users to use it to display ads. For example, when you perform a search using it, the hijacker immediately redirects to a web page, that resembles google results but Is full of ads:

Since these ads may lead to suspicious websites, users are advised to stay way from the Weknow domains, because they represent an indirect risk for their Macs, because they may lead you to various shady sites, such as:

  • Malicious sites.
  • Phishing sites.
  • Tech Support scam sites.
  • Redirection loop sites.

Usually the main purpose of browser hijackers, like weknow.us is to get users to visit ad sites that have pay-per-click and other schemes in them which automatically generate funds to their authors. But since these authors care only for profits, they may also perform many other tactics that may include aggregating your information via cookies and other unwanted activities.

Remove Weknow.us from Your Mac

To remove this browser hijacker effectively from your Mac, we recommend that you follow the removal instructions underneath this article. They have been divided in manual and automatic removal methods so that they can help you delete this hijacker effectively. For maximum effectiveness, security exerts always advise users to download and run a scan on their Macs, using the appropriate anti-malware software. Such tool will effectively scan your Mac fro viruses and remove any malicious files that might be related to Weknow.us so that it is gone for good.

Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

More Posts - Website

Leave a Comment

Your email address will not be published. Required fields are marked *

Time limit is exhausted. Please reload CAPTCHA.

Share on Facebook Share
Share on Twitter Tweet
Share on Google Plus Share
Share on Linkedin Share
Share on Digg Share
Share on Reddit Share
Share on Stumbleupon Share