CrySiS ransomware virus. How to delete? (Removal tutorial)

removal by Julie Splinters - - | Type: Ransomware
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The threats of CrySiS ransomware

CrySiS ransomware virus has been threatening computer users since the beginning of 2016. Since then, the virus has changed its methods of distribution and now it targets the different region. From the early August, it started attacking people and businesses located in Australia and New Zealand. However, if you are living in the different part of the world, you should not feel safe. This or another ransomware virus can still find the way to your PC. Once CrySiS virus infiltrates computer’s system, it starts encrypting the files. The virus can corrupt various file formats by adding .CrySiS file extension. When file encryption process is over victims cannot access any of their files. However, the crooks leave a ransom note Howto_Restore_FILES.TXT where they explain that victims have only 72 hours to pay the ransom. Later their decryption key will be destroyed, and users will never get their files back. However, if you have encountered this virus, data encryption should not be your priority. You have to remove CrySiS virus first. Only then, you can think about recovering encrypted data. But let us remind you that hackers rarely give the decryption key. They are only interested in generating money and creating new illegal projects.

For file encryption, the virus uses AES and RSA algorithms that include a public and a private key. CrySiS virus locks files with a public key, so for encrypting the files, victims need a private key. According to the crooks, the private key is located in ‘special secret server.’ Unfortunately, this key is the only way to restore your files at the moment. Different sources claim that the amount of ransom varies from 300 GBP to almost 800 GBP. Is it worth paying? Absolutely not. Paying the ransom is a risky decision that might not help to recover your files. In the ransom note the hackers try to convince users that it’s impossible to remove the virus; however, it’s not true. You should initiate CrySiS removal as soon as it appears on your PC. Anti-malware tools such as Reimage might be handy in ransomware elimination process too.

The example of CrySiS ransomware virus

Methods of distribution

When CrySiS ransomware appeared for the first time, it mostly attacked users via malicious email campaigns and fake software installers. Now the crooks decided to change methods of distribution and started using Remote Desktop Protocol (RDP). RDP allows users to remotely access computers, local devices and even files located on remote PCs. So, CrySiS ransomware virus launches aggressive attacks until it manages to get inside a remote computer. Moreover, the virus cannot be satisfied with only encrypting the files on a remote computer. It can attack connected computers and encrypt their files too. This feature is especially dangerous for big companies that use RDP on the daily basis. However, users can protect their computers from viruses. They have to avoid suspicious domains and file-sharing websites, don’t download unknown or questionable software, and stay away from shady emails.

Is it possible to remove CrySiS and restore encrypted files?

CrySiS removal is a hard, but attainable task. Ransomware type viruses usually are capable of blocking anti-malware programs or preventing them from scanning computer’s system. However, it’s still possible to do it. If you don’t have any anti-malware program, we recommend using Reimage or Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus. If you already have it, make sure you are using the updated version of it. In order to help you, we prepared detailed instructions how to remove CrySiS which you can find at the end of the article. Unfortunately, eliminating the virus is not enough to restore locked files. At the moment there’re no free decryption tools that could help to recover the data. However, if you have made backup copies, you can restore your data from them. If not, take CrySiS attack as a hard lesson that you should regularly backup your files and store them in external devices. Nowadays the Internet is full of dangerous viruses that are capable of encrypting or deleting your files. So, you should always be prepared for the worst.

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Computer security experts recommend using Reimage to uninstall CrySiS ransomware virus. Reimage scans the entire computer system and checks whether it is infected with spyware/malware or not. If you want to remove computer threats and secure your computer system, you should consider buying the licensed version of Reimage.

You can find more details about this program in Reimage review.

You can find more details about this program in Reimage review.
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Manual CrySiS Virus Removal Instructions:

Eliminate CrySiS using Safe Mode with Networking

You can detect malware using Reimage.
You need to purchase a licensed version of it to remove threats.
More details about Reimage.

  • Step 1: Restart your computer in Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Go to Start Shutdown Restart OK.
    2. As soon as your computer starts, start pressing F8 key repeatedly before the Windows logo shows up.
    3. Choose Safe Mode with Networking from the list Choose 'Safe Mode with Networking' option

    Windows 10 / Windows 8
    1. Click on the Power button at the Windows login screen, and then press and hold Shift key on your keyboard. Then click Restart.
    2. Then select Troubleshoot Advanced options Startup Settings and click Restart.
    3. Once your computer starts, select Enable Safe Mode with Networking from the list of options in Startup Settings. Choose 'Enable Safe Mode with Networking' option
  • Step 2: Remove CrySiS

    Sign in to your account and launch any Internet browser. Download a legitimate anti-malware software, for instance, Reimage. Make sure you update it to the latest version and then run a full system scan with it to detect and eliminate all malicious components of the ransomware to remove CrySiS completely.

If your ransomware does not allow you to access Safe Mode with Networking, please follow the instructions provided below.

Eliminate CrySiS using System Restore

You can detect malware using Reimage.
You need to purchase a licensed version of it to remove threats.
More details about Reimage.

  • Step 1: Restart your computer in Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Go to Start Shutdown Restart OK.
    2. As soon as your computer starts, start pressing F8 key repeatedly before the Windows logo shows up.
    3. Choose Command Prompt from the list Choose 'Safe Mode with Command Prompt' option

    Windows 10 / Windows 8
    1. Click on the Power button at the Windows login screen, and then press and hold Shift key on your keyboard. Then click Restart.
    2. Then select Troubleshoot Advanced options Startup Settings and click Restart.
    3. Once your computer starts, select Enable Safe Mode with Command Prompt from the list of options in Startup Settings. Choose 'Enable Safe Mode with Command Prompt' option
  • Step 2: Perform a system restore to recover files and settings
    1. When the Command Prompt window appears, type in cd restore and press Enter. Type 'cd restore' without quotes and hit 'Enter'
    2. Then type rstrui.exe and hit Enter.. Type 'rstrui.exe' without quotes and hit 'Enter'
    3. In a new window that shows up, click the Next button and choose a restore point that was created before the infiltration of CrySiS and then click on the Next button again. When 'System Restore' wizard comes up, click 'Next'. Choose a preferable restore point and click 'Next'
    4. To start system restore, click Yes. Hit 'Yes' and start system restore
    After restoring the computer system to an antecedent date, install and check your computer with Reimage to uncover any remains of CrySiS.

It is strongly recommended to take precautions and secure your computer from malware attacks. To protect your PC from CrySiS and other dangerous viruses, you should install and keep a powerful malware removal tool, for instance, Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware.

About the author

Julie Splinters
Julie Splinters

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