How to remove the Moosjs.cn “Virus” from Chrome/Firefox

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How irritating is this virus?

This page aims to help you remove the  Moosjs.cn “Virus”. Our removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows.

The article you are going to read has been written with the sole purpose of explaining how a program called Moosjs.cn normally acts, and what the proper methods of removing it are. To begin with, you have to know that this product is based on browser hijackers, which means that it can only infect and affect your browsers (Chrome/ Firefox/Explorer) and it is fully capable of:

  • displaying numerous advertisements like colorful boxes, banners and pop-ups;
  • authorizing your browsers to redirect you to often unfamiliar web pages, that you have never had the intention of visiting;
  • making your browsers substitute the usual homepages and search engines you are already used to with entirely new ones, which could be unknown to you.

Browser Hijacker basics

In general, browser hijackers count as ad-generating programs, which are NOT hazardous at all. This means that there is a big difference between Moosjs.cn, for instance, and the most widely spread viruses such as Ransomware and Trojan horse versions. To prove this statement we are going to mention the basic differences between these two types of software.

  • Always remember that the hijackers we have come across so far only possess the aforementioned features, plus some more slightly disturbing ones. Such an annoying possible consequence that may result from the activities of Moosjs.cn is the potential slowdown of your machine. Sometimes the redirecting and ad-producing processes might consume a lot of RAM and CPU, thus making your device a little slower. Nevertheless, such a possibility entirely depends on the characteristics of your computer. Another slightly unpleasant effect of most of the developed hijackers is that once they have infected your browsers, they could receive access to their history records. Consequently, you can expect to see only ads containing familiar goods or advertising services you have recently been researching. Also, the same could happen with the redirecting process. The pages you are being sent to could have to do with your common search requests.
  • The viruses we have mentioned above, on the other hand, are capable of doing many more dangerous things to your PC – Trojans could steal important private details (such as banking info or account credentials); they can record your key strokes, turn on your camera and watch you remotely. The Ransomware-based viruses could access all your disks and drives, determine which files you use most and lock them up so that you won’t be able to access them.
  • Based on the above arguments, we can conclude that Moosjs.cn is not a malicious program and at least, you don’t have to worry about that.

Distribution methods

One more quite shady characteristic of the  Moosjs.cn  “Virus” and its sibling programs is the way they normally get spread. Among the potential sources we can name the illegal software and torrent-distributing websites, some torrents, spam in any form, and contagious pop-ups. Nonetheless, the source to be blamed for the biggest number of infections ever is called program bundling. To bundle means to gather all kinds of software (games/apps/programs/ Adware and hijackers) together and spread them in such mixtures. Normally, such combos are completely free for the user and you may get very excited, because of the prospect to use free software, which seems new and interesting to you. Here comes the basic mistake most of the victim users make that gets them infected with the Moosjs.cn “Virus”. In case you have decided to really download and use such bundled software, you need to calm down and act in a sensible way. Briefly speaking, you need to install the bundle in the most harmless way, which means that you shouldn’t use the following installer options:

  • Recommended/ Quick/ Default/ Automatic – as they cannot give you the entire power to change and customize the installation process. Generally, they could only install the entire bundle and you may end up infected as a result of that.

Instead, the wizard options which will work best in your interest are called:

  • Custom/ Advanced – if you select one of them, you will have the power to change the number of the programs you want installed on your PC, as well as their specific features that you desire.

To be completely precise, this piece of advice is very general and could save you from very serious threats such as malware contamination. Learn to perform such a controlled installation process and you will completely minimize the chances of catching a browser hijacker (and all other kinds of irritating programs).

Removal of Moosjs.cn

Just trust a reliable guide like the one we have created. It is available below and contains all the necessary steps to help you uninstall this annoying hijacker.

SUMMARY:

NameMoosjs.cn
TypeBrowser Hijacker
Danger LevelMedium (nowhere near threats like Ransomware, but still a security risk)
SymptomsYour browser settings could change as a result of this infection.
Distribution MethodProgram bundles in the most common cases; sometimes shareware, spam and torrents.
Detection Tool

Keep in mind, SpyHunter’s malware detection tool is free. To remove the infection, you’ll need to purchase the full version.
More information about SpyHunter and steps to uninstall.

Moosjs.cn Virus Removal


Step1

Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).

Step2

This is the most important step. Do not skip it if you want to remove Moosjs.cn successfully!

Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab (the “Details” Tab on Win 8 and 10). Try to determine which processes are dangerous. 

malware-start-taskbar

Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

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/


After you open their folder, end the processes that are infected, then delete their folders. 

Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections. 

Step3

Hold together the Start Key and R. Type appwiz.cpl –> OK.

appwiz

You are now in the Control Panel. Look for suspicious entries. Uninstall it/them.

Type msconfig in the search field and hit enter. A window will pop-up:

msconfig_opt

Startup —> Uncheck entries that have “Unknown” as Manufacturer or otherwise look suspicious.

Step4

Hold the Start Key and R –  copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

hosts_opt (1)

If there are suspicious IPs below “Localhost” – write to us in the comments.

Open the start menu and search for Network Connections (On Windows 10 you just write it after clicking the Windows button), press enter.

  1. Right-click on the Network Adapter you are using —> Properties —> Internet Protocol Version 4 (ICP/IP), click  Properties.
  2. The DNS line should be set to Obtain DNS server automatically. If it is not, set it yourself.
  3. Click on Advanced —> the DNS tab. Remove everything here (if there is something) —> OK.

DNS

Step5

  • After you complete this step, the threat will be gone from your browsers. Finish the next step as well or it may reappear on a system reboot.

Right click on the browser’s shortcut —> Properties.

NOTE: We are showing Google Chrome, but you can do this for Firefox and IE (or Edge).

browser-hijacker-taskbar-properties

Properties —–> Shortcut. In Target, remove everything after .exe.

ie9-10_512x512  Remove Moosjs.cn from Internet Explorer:

Open IE, click  IE GEAR —–> Manage Add-ons.

pic 3

Find the threat —> Disable. Go to IE GEAR —–> Internet Options —> change the URL to whatever you use (if hijacked) —> Apply.

firefox-512 Remove Moosjs.cn from Firefox:

Open Firefoxclick  mozilla menu  ——-> Add-ons —-> Extensions.

pic 6

Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove Moosjs.cn from Chrome:

Close Chrome. Navigate to:

 C:/Users/!!!!USER NAME!!!!/AppData/Local/Google/Chrome/User Data. There is a Folder called “Default” inside:

Rename the Folder to Backup Default

Rename it to Backup Default. Restart Chrome.

Step6

WARNING!
To remove parasite, you may have to meddle with system files and registries. Making a mistake and deleting the wrong thing may damage your system.
Avoid this by using SpyHunter - a professional Parasite removal tool.

Keep in mind, SpyHunter’s malware & virus scanner is free. To remove the infection, you'll need to purchase its full version. More information about SpyHunter and steps to uninstall.

Type Regedit in the windows search field and press Enter.

Inside, press CTRL and F together and type the threat’s Name. Right click and delete any entries you find with a similar name. If they don’t show up this way, go manually to these directories and delete/uninstall them:

  • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
    HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
    HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

If the guide didn’t help you, download the anti-virus program we recommended or ask us in the comments for guidance!