How to Remove Weknow.ac Virus from Mac (Nov. 2018 Update)


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This page aims to help you remove Weknow.ac “Malware”. Our removal instructions work for Safari,Chrome, Firefox , as well as every version of Mac OSX.

In most cases, when faced with some suspicious-looking software on their PC, most users directly assume that they have some kind of nasty virus program on their hands. However, the truth is that, oftentimes, you might have some undesirable software on your PC that isn’t necessarily some dangerous security threat the likes of a Ransomware or a Trojan. One example of a unwanted, yet not particularly dangerous dangerous piece of software is Weknow.ac “Malware”. Weknow.ac “Mlaware” is a browser hijacker app – it can invade your browser and replace its default search engine, homepage, toolbar or make some other modifications to the browser that you might not like or want. Hijackers are also known for redirecting the user to random promoted pages as well as displaying tons of intrusive ads on the user’s screen during each browsing session. Normally, any browser can get affected – Safari,Chrome, Firefox and so on. Now, it might not sound like much if an issue to have your search engine and homepage replaced and to have ads show up on your screen every now and then but trust us, this can really get on your nerves, especially if you are trying to get something done using your browser. Not only that, but the hijacker is likely not going to allow you to revert the imposed changes unless, of course, the unwanted app itself gets removed. For those of you who might be interested, down below, we will show you how to remove Weknow.ac “Malware” from your computers. Therefore, if you have this hijacker on your machine right now and you want to eliminate it, feel free to use the instructions from the removal guide down below. Remember that a simple uninstall is unlikely to fully take care of the hijacker annoyance which is why you are advised to complete all of the steps from the guide manual. In it, you can also find a removal tool for unwanted and potentially dangerous software – you can use that as well in combination with the guide or as an alternative method for eradicating the hijacker app. 

Weknow.ac Virus Mac

Weknow.ac “Malware”

How to Remove Weknow.ac “Malware” 

Step1

The first thing you need to do is to Quit Safari (if it is opened). If you have trouble closing it normally, you may need to Force Quit Safari:

You can choose the Apple menu and click on Force Quit.

Alternatively you can simultaneously press (the Command key situated next to the space bar), Option (the key right next to it) and Escape (the key located at the upper left corner of your keyboard).

If you have done it right a dialog box titled Force Quit Applications will open up.

In this new dialog window select Safari, then press the Force Quit button, then confirm with Force Quit again.

Close the dialog box/window.

Step2

WARNING! READ CAREFULLY BEFORE PROCEEDING!

Start Activity Monitor by opening up Finder, then proceed to activity-monitor

Once there, look at all the processes: if you believe any of them are hijacking your results, or are part of the problem, highlight the process with your mouse, then click the “i” button at the top. This will open up the following box:

chromeinfo

Now click on Sample at the bottom:

chromesample

Do this for all processes you believe are part of the threat, and run any suspicious files in our online virus scanner, then delete the malicious files:

Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at: https://howtoremove.guide/online-virus-scanner/




Scan Results


Virus Scanner Result
ClamAV
AVG AV
Maldet

Step3

The next step is to safely launch Safari again. Press and hold the Shift key while relaunching Safari. This will prevent Safari’s previously opened pages from loading again. Once Safari is opened up, you can release the Shift key.

On the off chance that you are still having trouble with scripts interrupting the closing of unwanted pages in Safari, you may need to take some additional measures.

First, Force Quit Safari again.

Now if you are using a Wi-Fi connection turn it off by selecting Wi-Fi off in you Mac’s Menu. If you are using a cable internet (Ethernet connection), disconnect the Ethernet cable.

Step4

Re-Launch Safari but don’t forget to press and hold the Shift button while doing it, so no previous pages can be opened up. Now, Click on Preferences in the Safari menu,

Preferences in Safari

and then again on the Extensions tab,

extensions in safari

Select and Uninstall any extensions that you don’t recognize by clicking on the Uninstall button. If you are not sure and don’t want to take any risks you can safely uninstall all extensions, none are required for normal system operation.
Step5

The threat has likely infected all of your browsers. The instructions below need to be applied for all browsers you are using.

Again select Preferences in the Safari Menu, but this time click on the Privacy tab,
Privacy in Safari

Now click on Remove All Website Data, confirm with Remove Now. Keep in mind that after you do this all stored website data will be deleted. You will need to sign-in again for all websites that require any form of authentication.

Still in the Preferences menu, hit the General tab

General Tab in Safari

Check if your Homepage is the one you have selected, if not change it to whatever you prefer.
Default Home Page

Select the History menu this time, and click on Clear History. This way you will prevent accidentally opening a problematic web page again.

firefox-512 How to Remove Weknow.ac From Firefox in OSX:

Open Firefoxclick on mozilla menu (top right) ——-> Add-onsHit Extensions next.

pic 6

The problem should be lurking somewhere around here –  Remove it. Then Refresh Your Firefox Settings.


chrome-logo-transparent-backgroundHow to Remove Weknow.ac From Chrome in OSX:

Start Chrome, click chrome menu icon —–>More Tools —–> Extensions. There,  find the malware and  select  chrome-trash-icon.

pic 8

Click chrome menu icon again, and proceed to Settings —> Search, the fourth tab, select Manage Search Engines.  Delete everything but the search engines you normally use. After that Reset Your Chrome Settings.

If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!

Online advertising and browser hijackers

Despite how they might be initially to the user, most hijacker apps are pretty useless for the customer or even if they have some helpful trait programmed into them, that would still likely not be enough to make up for the otherwise highly-intrusive and obstructive nature of the application. However, the fact that the end-user would hardly ever benefit from an app the likes of Weknow.ac is certainly not to say that this app doesn’t benefit anybody. The creators of such hijackers accumulate significant amounts of money via their products’ advertising campaigns by employing revenue-generation models like Pay-Per-Click and Pay-Per-View. Through the ads, redirects and browser changes imposed on the user’s browser, hijackers like Weknow.ac can earn considerable profits for their creators at the expense of the end-user’s patience and nerves.

This, however, is not the sole reason why such apps are generally regarded as unwanted. Now, as we said, Weknow.ac is not a dangerous virus, it is not some kind of a nasty Ransomware, Trojan, Spyware or some other similar type of harmful malware. However, there are certain risks commonly associated with hijackers and most of those risks are connected to the ads and page redirects caused by such apps. You see, not all online ads you come across online are safe and since hijackers drastically increase the number of advertisements you get exposed to while browsing, the chances of stumbling upon some hazardous ad that might land you on some sketchy or even hazardous web location also increase. The best piece of advice we can give you here is to keep your distance from any ads you might see in your browser at least until the hijacker has been safely removed from your machine (which is also something you are advised to do).

The file-bundling software distribution model

Spam, malvertising, torrents, pirated downloads and other similar techniques are sued for spreading hijackers but the most effective method still seems to be the so-called software-bundling. Hijackers like Weknow.ac are frequently added to other programs as optional elements that can be installed along the main program. The thing is that, if you don’t want the optional install, you’d need to manually uncheck it from the setup menu. However, a lot f users don’t actually do that – a mistake which lands them unwanted apps such as hijackers. In order to prevent this from happening to you in future, always take a look at the advanced/expanded installation menu. If you see any optional installs there that you might not want to be in your system, simple uncheck them and only then carry on with the installation.

SUMMARY:

Name Weknow.ac
Type  Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms  Any kind of browsing disturbance related to browser changes and ads-generation can be attributed to the presence of a hijacker on your PC.
Distribution Method Different methods such as spam, malvertising, software bundling, torrents and others are oftentimes used for the distribution of hijackers.
Detection Tool

1 Comment

  • I kept trying the steps here and everywhere I could find them and while I was certain that I had removed the local adware/malware my Chrome browser STILL would default to WeKnow and every time I opened Chrome it added another reference to WeKnow in my search engine list. One of which was always dark bold font and could not be removed or successfully edited.

    Ultimately, I found a reference (link below if you want to read the thread, but I’ve put the steps here to make it easy) to the fact that the malware makes changes to your Chrome policies (you can see them by typing chrome://policy into your chrome browser). You can fix the problem by doing the following:

    1) Open your Terminal application (easy way is type “Terminal” into your spotlight search and hit return, OR open your Applications folder, open the Utilities folder in that folder an double click the “Terminal” application in that folder.

    2) Copy and paste each of these lines into the terminal application window at the prompt one at a time hitting return after you paste the line in.

    3) Restart your computer and open Chrome.

    4) Smile and have a drink.

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