What is Cantopen Ransomware

Cantopen is a ransomware infection that was discovered quite recently. It encrypts personal files by adding the .cantopen extension and creating the HELP_DECRYPT_YOUR_FILES.txt text file to blackmail victims into paying the ransom. To illustrate, a file named 1.pdf will be altered to 1.pdf.cantopen and drop its original shortcut icon. Such a change will be applied to all the targeted data making it no longer accessible.


Oops All Of your important files were encrypted Like document pictures videos etc..
Don't worry, you can return all your files!
All your files, documents, photos, databases and other important files are encrypted by a strong encryption.
How to recover files?
RSA is a asymmetric cryptographic algorithm, you need one key for encryption and one key for decryption so you need private key to recover your files. It’s not possible to recover your files without private key.
The only method of recovering files is to purchase an unique private key.Only we can give you this key and only we can recover your files.
What guarantees you have?
As evidence, you can send us 1 file to decrypt by email We will send you a recovery file Prove that we can decrypt your file
Please You must follow these steps carefully to decrypt your files:
Send $500 worth of bitcoin to wallet: bc1q6ug0vrxz66d564qznclu9yyyvn6zurskezmt64
after payment,we will send you Decryptor software
contact email: CCWhite@onionmail.org
Your personal ID: -

In order to recover the blocked files, victims are instructed to follow guidelines presented in HELP_DECRYPT_YOUR_FILES.txt. It is said victims should purchase a special recovery key which costs 500$ dollars. The payment has to be done in BTC (Bitcoin) to the attached crypto address. After following their requests and completing the payment, victims should contact cybercriminals and receive decryption software eventually. Unfortunately, we have to inform you that paying the ransom does not guarantee they will recover your data eventually. At the same time, it is impossible to decrypt Cantopen files without the help of cybercriminals. The virus uses RSA algorithms which makes manual decryption practically undoable. You can avoid paying the ransom and recover your data safe by using backup copies. In case such copies are absent and you still do not want to risk paying for the decryption, find information on possible recovery methods in our tutorial below. Some of them may be able to decrypt your data at least to a partial extent. Note that prior to trying any of the recovery methods, it is important to make sure Cantopen Ransomware is removed from your system. Do it with the help of our instructions below.

cantopen ransomware

How Cantopen Ransomware infected your computer

Ransomware infections may sneak unsupervised via many possible channels – e.g. e-mail spam letters, trojans, unprotected RDP configuration, backdoors, keyloggers, web-injects, fake software updates/installers, and other social engineering tricks on the web.

E-mail spam letters are perceived as messages containing malicious attachments. These attachments are usually named as something “important” or “urgent” to tug users into opening them. It is also common to see such messages delivered from sources named similar to legitimate companies (DHL, DPD, FedEx, etc.). If you see a message urging you to open some Word, Excel, PDF, EXE, or JavaScript files, be sure it is a trap aimed at infecting your PC. Apart from this distribution method, users should be more careful while downloading pirated or cracked software from the web. There are some websites that spread malware camouflaged under free programs. Such websites may also be opened via fake ads claiming your PC is outdated or infected with malware. To minimize the risk of getting infected with such threats in the future, it is important to follow a set of simple rules when using the web – be more careful and not trust everything placed on the Internet. You can follow our guide to extend your knowledge on various protection methods against infections we discussed above.

  1. Download Cantopen Ransomware Removal Tool
  2. Get decryption tool for .cantopen files
  3. Recover encrypted files with Stellar Data Recovery Professional
  4. Restore encrypted files with Windows Previous Versions
  5. Restore files with Shadow Explorer
  6. How to protect from threats like Cantopen Ransomware

Download Removal Tool

Download Removal Tool

To remove Cantopen Ransomware completely, we recommend you to use Norton Antivirus from Symantec. It detects and removes all files, folders, and registry keys of Cantopen Ransomware and prevents future infections by similar viruses.

Alternative Removal Tool

Download SpyHunter 5

To remove Cantopen Ransomware completely, we recommend you to use SpyHunter 5 from EnigmaSoft Limited. It detects and removes all files, folders, and registry keys of Cantopen Ransomware. The trial version of SpyHunter 5 offers virus scan and 1-time removal for FREE.

Cantopen Ransomware files:


Cantopen Ransomware registry keys:

no information

How to decrypt and restore .cantopen files

Use automated decryptors

Download Kaspersky RakhniDecryptor

kaspersky dharma ransomware decryptor

Use following tool from Kaspersky called Rakhni Decryptor, that can decrypt .cantopen files. Download it here:

Download RakhniDecryptor

There is no purpose to pay the ransom because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

Dr.Web Rescue Pack

Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .cantopen files by uploading samples to Dr. Web Ransomware Decryption Service. Analyzing files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.

If you are infected with Cantopen Ransomware and removed from your computer you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Data Recovery Professional to restore .cantopen files

stellar data recovery professional

  1. Download Stellar Data Recovery Professional.
  2. Click Recover Data button.
  3. Select type of files you want to restore and click Next button.
  4. Choose location where you would like to restore files from and click Scan button.
  5. Preview found files, choose ones you will restore and click Recover.
Download Stellar Data Recovery Professional

Using Windows Previous Versions option:

  1. Right-click on infected file and choose Properties.
  2. Select Previous Versions tab.
  3. Choose particular version of the file and click Copy.
  4. To restore the selected file and replace the existing one, click on the Restore button.
  5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

  1. Download Shadow Explorer program.
  2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
  3. Select the drive and date that you want to restore from.
  4. Right-click on a folder name and select Export.
  5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

  1. Login to the DropBox website and go to the folder that contains encrypted files.
  2. Right-click on the encrypted file and select Previous Versions.
  3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses, like Cantopen Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

Download ZoneAlarm Anti-Ransomware

2. Back up your files

idrive backup

As an additional way to save your files, we recommend online backup. Local storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. Cantopen Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.

3. Do not open spam e-mails and protect your mailbox

mailwasher pro

Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.

Download MailWasher Pro
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