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Weknow.ac Removal from Mac

The article will help you to remove Weknow.ac fully. Follow the browser hijacker removal instructions given at the end of the article.

The Weknow.ac redirect is a browser extension that can be used for hijacker purposes. Interaction with it can hijack personal data belonging to the victims. Our in-depth article explores some of the dangers associated with its presence on infected hosts.

Threat Summary

Name Weknow.ac redirect
Type Browser Hijacker, PUP
Short Description The hijacker redirect can alter the homepage, search engine and new tab on every browser application you have installed.
Symptoms The homepage, new tab and search engine of all your browsers will be switched to Weknow.ac. You will be redirected and could see sponsored content.
Distribution Method Freeware Installations, Bundled Packages
Detection Tool See If Your System Has Been Affected by malware

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Malware Removal Tool

User Experience Join Our Forum to Discuss Weknow.ac redirect.

Weknow.ac Redirect – February 2020 Update

One Mac user had the following to report on Apple Community forums regarding:

Reuben_Hood
User level: Level 1
(53 points)
Apple MusicSpeciality level out of ten: 0
Question: Q:
Remove “weknow.ac” Malware in Chrome?

iMac (Retina 5K, 27-inch, Late 2015), 3.3 GHz Intel Core i5, 16 GB 1867 MHz DDR3, 1.7 TB free — Running High Sierra 10.13.6 (17G65). For a variety of reasons, Chrome is my default browser, and Google is my default search engine and homepage. While browsing with Chrome two days ago, I made the idiotic mistake of clicking on a Flash download popup and immediately noticed signs of infection by this malware. The main only noticeable effect is that my homepage, tab option, and search engine in the Chrome browser now default to this alien “weknow.ac” search engine, which produces results very different from Google’s. I’ve tried three long phone troubleshooting sessions with Apple Help, including downloading and scanning with Malwarebytes, which read my computer as “clean.” Also pursued other remedial steps I’ve seen suggested in other websites. (Although there are only a few that deal specifically with Chrome on Mac.) Uninstalled Chrome application, including trashing all its support folders from Library. However, the bug still keeps coming back. The “good” news is that Safari (so far) shows no sign of the infestation — so I’m using that as my only browser. However, I don’t want my (still relatively new) iMac to go through the rest of its life with this alien entity ticking away in its innards. Can anyone here recommend a more permanent solution to my problem? Is there a third-party malware removal product that’s both effective and trustworthy? Thanks in advance for any help.

The browser hijacker has been found to modify important parameters across all popular web browsers. In the case of Google Chrome it will change the program’s policies which governs how the browser operates. At the moment there is a widespread campaign targeting mainly Mac users and specifically the browsers that are used the most by them — Safari and Google Chrome. The attackers are infecting the victim users mainly via fake Adobe Flash updates. The mechanism is the usual — fake download sites, ad redirects and other type of web content that links to the malicious files.

As one of the most popular browser hijackers in the last few months the WeKnow.Ac will use all popular methods in order to infect as many users as possible. In the case of Safari the hijacker will modify the system preferences in order to block the real-time engines of some anti-malware tools from fixing it automatically.

Weknow.ac – Distribution Methods

Weknow.ac is a browser redirect code that can be installed using different tactics. One of the main methods used by computer hackers is the use of malicious emails. They utilize social engineering tactics that utilize web elements taken from legitimate sites and web services. The users may mistake them for legitimate notifications, password reminders and other materials that can be sent by them. The redirect code can feature code or links that can lead to the Weknow.ac redirect infection.

The Weknow.ac redirect code can also be distributed using infected payload carriers, there are two primary types:

  • Infected Documents — The hackers behind the threat embed malicious scripts in documents of various types: presentations, rich text documents, databases and spreadsheets. Once they are opened by the victims a notification prompt is spawned which asks them to run the built-in scripts (macros). This will trigger the virus infection sequence.
  • Application Installers — The Weknow.ac redirect code can be embedded in application installers using a similar method. They are made by taking the legitimate installers from the official vendor sites with the redirect code. The operators usually target popular choices among end users such as system utilities, creativity suites and productivity tools.

One of the most effective methods rely on the inclusion of the Weknow.ac redirect code in browser hijackers. They are counterfeit browser plugins that are being advertised on official web browser repositories and other download sites. They feature an elaborate description that promises users new functionality addition. The operators may also use fake user reviews and developer credentials.

Infections can also come from the use of file sharing networks like BitTorrent. Many of the reported victim hosts are probably being infected by a file posing as a Adobe Flash Player Update.

Weknow.ac – Detailed Description

The Weknow.ac browser redirect follows the typical behavior patterns associated with this type of malware. One of the first modifications that it does is the browser manipulation — the engine will change the default settings to redirect the users to a hacker-operated site. The values that are changed include the default home page, search engine and new tabs page.

As the infections spread from the browsers themselves the hacker operators can acquire the stored information: cookies, bookmarks, history, passwords and etc.

Following the Weknow.ac infection several malicious behavior patterns can be applied:

  • Information Gathering — A separate and more complex infection engine can be called to hijack additional information. It is configured to extract strings related to the victim’s identity (their name, address, phone number, passwords and etc.) or additional data that can be used to optimize the attack campaigns — regional settings, analytics data, hardware components and etc.
  • Persistent Threat — The browser hijacker can be installed as a persistent threat which makes manual user recovery non-working in some cases. This is related to the fact that the virus engine can edit configuration files and Windows Registry values.
  • Windows Registry Modification — The Weknow.ac browser redirect can reconfigure the Windows Registry which can have consequence on the systems in general. Such actions can render certain application features non-working or cause system performance instability.
  • Trojan Module — Advanced configuration instances of browser redirects can generate a Trojan horse infection. It sets up a secure connection to a hacker-controlled server. It allows the operators to take over control of the infected machines, spy on the users and deploy additional malware.

Opening the Weknow.ac browser redirect displays a customized search engine page. The operators have used a familiar template that is modeled after legitimate web services in order to coerce the users that they are using a safe and trusted site. WARNING! Any interaction with it may lead to infections with viruses or the redirection to sponsored or affiliate sites.

Such sites are frequently created in bulk by the hackers in an automated way, interacting with them (via the search engine box) can lead to cross-site links. The idea behind the sites is to harvest user data as much as possible. The operators use shared databases that assign generic domain names with various combinations in order to attract as much users as possible.

In some cases this site can redirect the users to a potentially malicious software. This is the reason why we recommend that all users are advised to install and use a quality anti-spyware tool to guard themselves from infections.

The template-based site is made up of three components: a top menu bar, a main search engine box and a bottom navigation bar.

Weknow.ac – Privacy Policy

The site does not link the web site service to any company in particular which is a warning sign that it might be malicious in nature. In such cases the operators usually use the data harvesting cookies and web tracking technologies to hijack information from the systems. It’s privacy policy may change over time however the listed information inside will probably will probably include a wide variety of data. At the moment of writing this article the service will collect the following data:

  • Technical Information — Certain technical information regarding your device, and your Use of the Software & Services and other third party software and applications installed on your device (the “Other Software”), including the type, name and version of operating system and Other Software including, without limitation, their interactions with the Software & Services, ISP (Internet Service Provider), location, Internet protocol (IP) address, anonymous user identifiers, device configuration and identifiers (IDFA (Identifier for Advertisers used in IOS), Advertising ID (Identifier for Advertisers used in Android) and the like), version of the Software & Services, and your configuration and settings of the Software & Services.
  • Usage Information — Certain usage related information regarding your use and interaction with your device, including the Software & Services and Other Software, such as when and how you Use the Software & Services and Other Software, how you use your internet browser and internet search related applications, the web pages you visit and the content you see, access and utilize on such web pages; for example, offerings and advertisements that you view, use and access, how you use them and your response to them, how frequently you use them, your search queries and the time and date of your searches.
  • Social Networks — Your interactions on social networks through the Software & Services.
  • Registration Related Information — Information you provide when you register for the Software & Services (if applicable), such as name, home or work addresses, e-mail address, telephone and fax numbers, birth date and gender.
  • Support Related Information — If you communicate with Us via our support section or via email, we may also collect your email address, name and any information voluntarily submitted by you in connection with such support (for example, your name, company name, and particular support query or request).
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Martin Beltov

Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer

How to Remove Weknow.ac redirect from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove Weknow.ac redirect

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall Weknow.ac redirect and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by Weknow.ac redirect on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by Weknow.ac redirect there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.


3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for Weknow.ac redirect with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.


Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer

Get rid of Weknow.ac redirect from Mac OS X.


Step 1: Uninstall Weknow.ac redirect and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:


2. Find Activity Monitor and double-click it:


3. In the Activity Monitor look for any suspicious processes, belonging or related to Weknow.ac redirect:

Tip: To quit a process completely, choose the “Force Quit” option.


4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.


5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to Weknow.ac redirect. If you find it, right-click on the app and select “Move to Trash”.


6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Weknow.ac redirect. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.


7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove Weknow.ac redirect via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as Weknow.ac redirect. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.


Step 2: Scan for and remove Weknow.ac redirect files from your Mac

When you are facing problems on your Mac as a result of unwanted scripts and programs such as Weknow.ac redirect, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.


Click the button below below to download SpyHunter for Mac and scan for Weknow.ac redirect:


Download

SpyHunter for Mac



Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Remove Weknow.ac redirect from Google Chrome.


Step 1: Start Google Chrome and open the drop menu


Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"


Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.


Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.


Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Erase Weknow.ac redirect from Mozilla Firefox.

Step 1: Start Mozilla Firefox. Open the menu window


Step 2: Select the "Add-ons" icon from the menu.


Step 3: Select the unwanted extension and click "Remove"


Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.



Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Uninstall Weknow.ac redirect from Microsoft Edge.


Step 1: Start Edge browser.


Step 2: Open the drop menu by clicking on the icon at the top right corner.


Step 3: From the drop menu select "Extensions".


Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.


Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.



Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Remove Weknow.ac redirect from Safari.


Step 1: Start the Safari app.


Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.


Step 3: From the menu, click on "Preferences".

stf-safari preferences


Step 4: After that, select the 'Extensions' Tab.

stf-safari-extensions


Step 5: Click once on the extension you want to remove.


Step 6: Click 'Uninstall'.

stf-safari uninstall

A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the Weknow.ac redirect will be removed.


How to Reset Safari
IMPORTANT: Before resetting Safari make sure you back up all your saved passwords within the browser in case you forget them.

Start Safari and then click on the gear leaver icon.

Click the Reset Safari button and you will reset the browser.


Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer


Eliminate Weknow.ac redirect from Internet Explorer.


Step 1: Start Internet Explorer.


Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'


Step 3: In the 'Manage Add-ons' window.


Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.


Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.


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