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Kropun Virus Removal Guide (+Decode .kropun files) – DJVU Ransomware

Kropun Virus Ransomware

The Kropun stands for a ransomware-type infection. The virus comes from the DJVU ransomware family. Kropun was elaborated specifically to encrypt all major file types. As soon as the file is encrypted people are not able to use them. Kropun adds the “.kropun” extension for each file encrypted by it. For example, the file “myphoto.jpg“, as soon as encrypted by Kropun, will be renamed into “myphoto.jpg.kropun“. As soon as the encryption is completed, Kropun places a special text file into every folder containing the encrypted data.

The message given by Kropun text file asking for the ransom is definitely the same as the statements given by other ransomware representatives coming from the DJVU clan. It literally discusses that the info is encrypted and that the only way to bring back it is to use a a special decryption key. Sadly, this is absolutely true. The kind of cryptography mechanism used by Kropun is still not correctly examined. Still, it is absolutely certain that each victim may be given the specific decryption key, which is totally unique. It is impossible to bring back the files without the key available.

Another trick of Kropun is that the victims cannot get to the key. The key is saved on a specific server run by the frauds associated with Kropun ransomware. To get the key and recover the important information people need to pay the ransom, which amounts to $980. To acquire the payment details users are instructed to contact the frauds through email or telegram. The alert also indicates that the users require to contact the Kropun developers within 72 hours after the files encryption took place. The message says that doing so users will get a 50% discount, so the ransom amount will fall to $490.

Nonetheless, irrespective of the asked for amount, people should stay away from paying the virus. Cyber frauds are unfair, so they tend to totally disregard what their victims feel about the problem, even when the payment reaches their pockets. This is why paying the ransom usually does not provide any positive outcome and people simply lose their money for nothing.

We strongly advise that you do not contact these crooks and absolutely do not transfer money into their accounts. It is said to admit that there are no utilities able to crack Kropun ransomware and to recover the information data for free. Therefore, the just best decision is to recover the lost data from the available backup.

Virus Summary

Name Kropun Ransomware
File Extension .kropun
Type Ransomware
Family DJVU
Short Description The ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
Symptoms File encryption by the ransomware is performed by means of the AES and RSA encryption algorithms. Once the encryption is completed, the ransomware adds its special kropun extension to all the files modified by it.
Distribution Method Spam Emails, Email Attachments
Similar Infections Besub, Litar, Nusar
Removal Tool   GridinSoft Anti-Malware

Keep in mind that the world wide web is now overwhelmed with threats that look comparable to Kropun ransomware. It is similar Besub and many other ransomware-type threats. Harmful programs of such kind are normally elaborated to encrypt important data and to state the demand prior to the user to pay the ransom. The peculiarity of all such ransomware threats is that all apply a similar algorithm to create the unique decryption key for information decryption.

Hence, as long as the ransomware is still being developed or has some hidden bugs, manually recovering the information is merely not feasible. The only way to avoid the loss of your important information is to regularly create backups of your important information.

Bear in mind that even if you create such backups, they must be put into a special storage utility not connect to your main computer. You may use the USB Memory Stick or external hard disk drive for this purpose, or refer to the help of the cloud storage. If you save your backup files on your common system they may be encrypted along with other files, so it’s certainly not a good storage place.

How did ransomware infect my system?

There are numerous methods used by online frauds to distribute Kropun ransom virus. Even though it is uncertain how precisely Kropun injects your system, there are some leaks through which it may penetrate the system:

  • integration with third-party software, especially freeware;
  • spam e-mails from unidentified senders;
  • websites rendering free hosting services;
  • pirated peer-to-peer (P2P) downloads.

Often Kropun ransomware may be presented as some genuine software application, for instance, in the pop-ups instructing users to execute some essential software updates. This is the common trick used by online frauds to persuade people into downloading and installing Kropun infection manually, by methods of their direct participation in the installation process.

Furthermore, the criminals might refer to different email spam strategies to inject malicious codes into PC. So, they may describe to sending unsolicited spam emails with tricky notifications promoting users to download the attachments or click on certain download links, for example, the ones encouraging users to open some receipts, documents, tax reports or invoices.

Needless to mention, opening such files or clicking on such dangerous links may severely harm the PC. Fictitious Adobe Flash Player upgrade notifies may result in Kropun ransom injection. When it comes to the cracked applications, these illegally downloaded programs may likewise contain destructive codes causing Kropun secret installation. Lastly, injection of Kropun may happen by means of Trojans that privately get injected into the system and set up harmful utilities without the user’s approval.

Is there any way to avoid the injection of Kropun ransom virus?

Even though there is no 100% guarantee to avoid your PC from getting infected, there are some pieces of suggestions we wish to show with you. First of all, be extremely careful when you surf the web and particularly while downloading complimentary programs. Stay away from opening suspicious email attachments, especially when the sender of the email is not familiar to you.

Remember that some freeware installers may include other unwanted utilities in the package, so they may be harmful. Make certain that your current anti-virus and your entire operating system is always duly updated.

Naturally, downloading pirated software is illegal and may lead to vital damage to be produced your system. Thus, stay away from downloading cracked software. You are likewise strongly recommended to reconsider your existing security software and potentially change to another security solution that can render better services of protecting your Windows.

Below please find the quotation from the Kropun text file:

ATTENTION!

 
Don't worry my friend, you can return all your files!
All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
https://we.tl/t-arDe4ZLdAE
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.
 
 
To get this software you need write on our e-mail:
mosteros@firemail.cc
 
Reserve e-mail address to contact us:
gorentos@bitmessage.ch
 
Our Telegram account:
@datarestore     
  

Screenshot of files with “.kropun” extension added by the ransomware:
Kropun Ransomware - encrypt files with .kropun extension

Use GridinSoft Anti-Malware to remove Kropun ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

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About Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

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