.Kuub Virus

The encrypted files may not be the only damage done to you. parasite may still be hiding on your PC. To determine whether you've been infected with ransomware, we recommend downloading SpyHunter.

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This page aims to help you remove .Kuub Virus for free. Our instructions also cover how any .Kuub file can be recovered.


.Kuub is what is known as a virus of the ransomware class. .Kuub encrypts the affected user’s files and renders them completely inaccessible.


The .Kuub Virus will leave this message in a _readme.txt file.

.Kuub is a Ransomware cryptovirus infection that targets personal user files, seeking to encrypt them. If your files have been encrypted by .Kuub, you will immediately notice a ransom-demanding note on your screen.

Unfortunately, we’re sorry to say that .Kuub is one of the most hazardous viruses out there. It’s a Ransomware cryptovirus that encrypts the files on your computer, making them unavailable to you, and then offers to give you the key for decryption in exchange for a ransom payment. Sadly, removing the virus (which you should most definitely do!) won’t help you restore those files – they’re going to stay encoded unless you apply the correct decryption key. In this guide, however, we will give you step-by-step instructions on how to remove .Kuub, and how to recover some of your files without having a decryption key.  

The .Kuub virus

.Kuub is a computer virus of the notorious Ransomware variety. A ransomware virus such as .Kuub would encrypt your files and demand a ransom payment in exchange for the decryption keys.

The .Kuub virus is very malicious software piece, which belongs to the Ransomware cryptovirus category. One of the most common ways in which the .Kuub virus can infect more systems is by using a malicious email attachment.

The victim will usually receive an email message containing either an infected file (this can be any file), or a link to a certain website. The Ransomware will be automatically downloaded to your computer after opening the file, or following the included link. Unfortunately, there’s little to no way to detect its presence, since this malware does not show visible symptoms.

If .Kuub succeeds in its malicious operation, it will inform you about the encryption that has taken place, usually through a message shown on your screen. The message will let you know that your files have been encrypted, and will tell you to send money to a given cryptocurrency wallet in exchange for a special decryption key. Typically, you’d be threatened that the required sum would double or triple if you do not pay soon. This is done in order to put some pressure on you, and discourage you from searching for alternative solutions to the ransom payment.

The .Kuub file encryption

.Kuub is a ransomware type of a computer virus. .Kuub is a very dangerous file encrypting malware that would cripple a user’s computer and demand a ransom payment in the form of Bitcoins.

The .Kuub file encryption is a big issue, and dealing with it may not be easy. Even after you remove the Ransomware, the .Kuub file encryption may not be reversed unless the correct decryption key is applied.

By paying the hackers, however, you will only ensure that they have the right motivation to continue with their blackmailing schemes. And with that in mind, here’s another thing to consider – people who go about hacking into the computers of other people, and extorting money from them shouldn’t really be trusted. There is no guarantee that they will send you that key they talk about, or that it will work. That’s why we suggest you don’t rush to pay them, and instead first try the steps in the guide below.

We can also recommend just a few simple but effective tips to keep your computer safe from Ransomware in the future. Needless to say, you should always keep a good antivirus program in the computer – one that has detection for Ransomware. Also, avoid opening emails from suspicious senders, particularly if they include attachments. And if you have opened one such message, please, do not hurry to download the attached file(s), or to click on the hyperlink, if there is one. You should also try to stay away from any obscure websites that could potentially hide viruses like .Kuub.


Name .Kuub
Type Ransomware
Danger Level High (Ransomware is by far the worst threat you can encounter)
Symptoms Very few and unnoticeable ones before the ransom notification comes up.
Distribution Method From fake ads and fake system requests to spam emails and contagious web pages.
Data Recovery Tool Currently Unavailable
Detection Tool

Remove .Kuub


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).



We get asked this a lot, so we are putting it here: Removing parasite manually may take hours and damage your system in the process. We recommend downloading SpyHunter to see if it can detect parasite files for you.

Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab. Try to determine which processes are dangerous. 


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

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

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.


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.

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


Go in Startup —> Uncheck entries that have “Unknown” as Manufacturer.

  • Please note that ransomware may even include a fake Manufacturer name to its process. Make sure you check out every process here is legitimate.


To remove parasite on your own, you may have to meddle with system files and registries. If you were to do this, you need to be extremely careful, because you may damage your system.

If you want to avoid the risk, we recommend downloading SpyHunter
a professional malware removal tool.

More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

Type Regedit in the windows search field and press EnterOnce inside, press CTRL and F together and type the virus’s Name. 

Search for the ransomware  in your registries and delete the entries. Be extremely careful –  you can damage your system if you delete entries not related to the ransomware.

Type each of the following in the Windows Search Field:

  1. %AppData%
  2. %LocalAppData%
  3. %ProgramData%
  4. %WinDir%
  5. %Temp%

Delete everything in Temp. The rest just check out for anything recently added. Remember to leave us a comment if you run into any trouble!


How to Decrypt .Kuub files

We have a comprehensive (and daily updated) guide on how to decrypt your files. Check it out here.

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!

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