Crypren Ransomware

What is Crypren Ransomware?

It is yet unknown how Crypren Ransomware spreads, but our specialists say that most likely it should be dropped on user’s system by some Trojan infection. Such malware could be traveling via Spam email, so users should be cautious. The infection encrypts personal files and forces users to pay the ransom in one week. After seven days, it promises to delete the key that is essential for deciphering your files. The truth is that those who created the malware might have no intention to give you the means to decrypt your files. Therefore, it could be that your data is lost either way. If removing the ransomware is the reason you are here, slide below the article and erase the infection with the instructions prepared by our specialists at

Where does Crypren Ransomware come from?

As we mentioned earlier, computer security specialists are still not one hundred percent sure how Crypren Ransomware is spread. Our researchers think that users could receive the ransomware with the help of Trojans that might travel through malicious executable files, which are spread through email. In fact, a huge amount of malware is spread this way, so you should avoid files that seem unfamiliar and suspicious to you. It is always better to learn more about the file before launching, e.g. you could scan it with an antimalware tool or type its title into your search engine and see if it is associated with malware.

How does Crypren Ransomware work?

For starters, it encrypts your data with the AES-256 cryptosystem. Apparently, it can encipher files that have listed extensions: .accdb, .accde, .accdr, .accdt, .bmp, .cpp, .cs, .css, .csv, .csy, .doc, .docm, .docx, .docxml, .docz, .gif, .gzip, .html, .jpg, .jpg2, .mdb, .mp3, .mp4, .mp4infovid, .mp4v, .pdf, and so on. You can recognize the enciphered files by the .encrypted extension at the end.

Another thing you should notice is that Crypren Ransomware adds HTML files that contain a warning message. These files should be in every folder alongside with the encrypted data. The HTML file redirects to a site created by the infection’s developers. One of the HTML files should be added to the Startup folder too. As a result, the site should be loaded when you restart the computer. Thus, the malware displays a pop-up window which says: “Please restart your computer and wait for instructions for decrypting your files or read READ_THIS html files that was created in every affected directory.”

The text in the instructions says that you have to pay a ransom of 0,1 Bitcoins. If you have no idea how to purchase bitcoins, the message also has links to additional information related to the purchasing of this digital currency. Also, it threatens to destroy the decryption key if you do not make the payment on time, which is seven days from when the encryption was completed.

How to erase Crypren Ransomware?

Our researchers determined that the ransomware’s executable file should be added in the %ALLUSERSPROFILE% directory. The problem is that this file should have a random name, so you will have to identify it yourself. The next thing you should do is to delete all HTML files. If you scroll a little below this text, you will see the step by step removal instructions. Also, you should be aware that you can erase the infection with a legitimate security tool, too. However, either way it would be a good idea to scan your system with an antimalware tool and erase other possible malware. If you need some help with the deletion part or you have some questions to ask, you can leave us a comment here.

Delete Crypren Ransomware

  1. Open the Explorer.
  2. Copy and insert given location %ALLUSERSPROFILE%
  3. Locate the executable file that has a random title.
  4. Right-click the executable file and select Delete.
  5. Locate the following path %APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup
  6. Find the HTML file created by Crypren Ransomware and right-click to delete it.
  7. Remove the rest of HTML files.
  8. Close the Explorer.
  9. Empty your Recycle Bin.
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