What is Logger.js? (Haso.pubmatic.com Removal)

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

This page aims to help you remove Logger.js/Haso.pubmatic.com. Our removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows.

In the event that you’ve been infected by Logger.js/Haso.pubmatic.com, there’s little to no way of mistaking it with another type of program. As a typical member of the adware family, Logger.js/Haso.pubmatic.com is designed to flood your browser with a stream of adverts of all the shapes and sizes you can imagine. You might have even experienced certain changes to your browser settings, such as your search queries being redirected to a different search engine, from the one you had set, and upon opening your browser there might be another homepage there to greet you, from what you last remember. Many users have found that even though they’ve tried to change the settings back to the way they were, it didn’t have much effect, as the next time they started their browser – it was as if they’d done nothing. In addition to this, nothing that they’ve tried to stop the numerous ads from appearing has worked either. Many install popup blockers and other ad-blocking and ad-filtering programs on their computer, but this, too, fails, because those tools are designed to battle ads that are generated by websites and not a program that’s firmly seated within your system. So, the point of this article and the guide below it is to show you how to remove this pesky software from your computer and avoid getting infected in the future.

Why the many ads?

Adware developers earn money based on the amount of times their ads get clicked. This means that it’s in their best interest to produce as many as possible and place them on as inconvenient for the user places as they can. This is probably the most annoying part, because you may have yourself felt what it’s like when you’re trying to navigate a certain page, but end up opening some new tab or window. However, the developers also strive to make the ads appealing to increase the chance of gaining more clicks. So, to do this, their software – be it Logger.js/Haso.pubmatic.com or another program of this type, has been programmed to collect information regarding your browsing activity. Things like the pages you visit, the topics you search for online, your most frequently visited and favorited websites, along with any details you may have entered are all gathered and stored by the ad-generating program. This allows it to later produce content that would be more relevant to you and though this might sound very clever and convenient at first glance, there’s more than just one side to this.

The downsides

The data that’s been gathered on you is often sold to third parties for the extra few bucks, once it’s no longer needed. Most times this is even stated in the EULA of the program, but who reads that, right? But even so, many users still consider this to be a violation of their privacy and adware is therefore also classified by security experts as a potentially unwanted program, but not only because of this. There’s also the fact that an advertising campaign that’s been created for each and every specific user cannot be expected to be 100% legit. One way or another, if you start clicking on the ads (which we do not advise for reasons we’ll explain later) you will soon find that by far not all of the ads actually answer to the content they redirect you to. In fact, a lot of the ads are downright misleading. On very rare occasions, those ads could even lead you to dangerous websites with all sorts of malicious programs lurking on them. You could this way fall victim to some virus such as a Trojan or ransomware, and this should hardly come as a surprise, as ransomware is actually most commonly distributed through malvertisements (malicious advertisements).  Don’t jump to the conclusion that Logger.js/Haso.pubmatic.com is a virus, though. It’s not. As pointed out, it’s more of a PUP and most adware is actually completely legal. Nonetheless, it is our advice to you to remove it from your PC, as aside from the aforementioned effects it may have on you, its long-term presence on your computer may cause it to slow down and malfunction.

Staying safe

When it comes to unwanted programs, be it of the annoying or malicious type, it’s important to avoid getting them on your machine altogether, as opposed to cleaning up the consequences. Be very cautious with the sites you visit and be even more cautious with the content you download from them. Programs like Logger.js/Haso.pubmatic.com are usually distributed through program bundles, usually with various freeware and shareware. So, aside from filtering your download sources, you should also always customize the setup of any new program you install. This will allow you to leave any unwanted contents behind.


Name Logger.js/Haso.pubmatic.com
Type Adware/Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Numerous ads distributed within your browser. Homepage and default search engine might be changed to unfamiliar ones.
Distribution Method Program bundles are the most successful method, however spam emails, other adware and certain ads could be likely sources as well.
Detection Tool Logger.js/Haso.pubmatic.com may be difficult to track down. Use SpyHunter – a professional parasite scanner – to make sure you find all files related to the infection.

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.


Logger.js/Haso.pubmatic.com Removal



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

This was the first preparation.


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 detection tool is free. To remove the infection, you'll need to purchase its full version. More information about SpyHunter and steps to uninstall.

Reveal All Hidden Files and Folders.

  • Do not skip this  – Logger.js/Haso.pubmatic.com may have hidden some of its files.

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


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:


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

  • Remember this step – if you have reason to believe a bigger threat (like ransomware) is on your PC, check everything here.


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.



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).


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

ie9-10_512x512  Remove Logger.js/Haso.pubmatic.com 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 Logger.js/Haso.pubmatic.com from Firefox:

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

pic 6

Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove Logger.js/Haso.pubmatic.com 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.

  • At this point the threat is gone from Chrome, but complete the entire guide or it may reappear on a system reboot.


Press CTRL + SHIFT + ESC simultaneously. Go to the Processes Tab. Try to determine which ones are dangerous. Google them or ask us in the comments.


This is the most important and difficult part. If you delete the wrong file, it may damage your system irreversibly. If you can not do this,
>> Download SpyHunter - a professional parasite scanner and remover.

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

Right click on each of the problematic processes separately and select Open File LocationEnd the process after you open the folder, then delete the directories you were sent to.



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 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

Remember to leave us a comment if you run into any trouble!

  • HowToRemove.Guide Team

    Hi Steven,
    did you manage to complete all the steps in Safe Mode ?