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CerBerSysLock ransomware. How to remove? (Uninstall guide)

removal by Ugnius Kiguolis - - | Type: Ransomware

CerBerSysLock ransomware tries to impersonate notorious Cerber virus

The image of CerBerSysLock ransomware

CerBerSysLock virus is a malicious program designed to compromise the most important files on the computer to demand a ransom. Experts spotted its activity in December 2017 — It uses XOR algorithms to encrypt data and appends .CerBerSysLocked0009881 file extension[1]. The victims receive HOW TO DECRYPT FILES.txt ransom note which encourages to contact the criminals via

CerBerSysLock ransom note states the following: 


The only way to decrypt your files is to receive the private key and decryption program.
You need to buy Cerber Decryptor v5.0 updated 2017-November.

Contact Email: 
Subject PRIVATE-ID: CerBerSysLocked0009881 

Currently, the amount of the ransom is unknown. However, it is stated that the files can only be recovered with Cerber Decryptor v5.0. Note that you should not follow the rules of Xorist-CerBerSysLock since there are numerous reports when victims were asked to pay even more money or left without the decryption tool afterward. 

Despite the fact that the virus introduces itself as the infamous Cerber ransomware, it is clear that it is merely an imposter. Experts believe that it is linked to another ransomware family Xorist which already has a CerberImposter called crypto-virus.

We suggest you not pay the ransom and remove CerBerSysLock immediately since there are alternative ways how you can recover your data. Pick Reimage and let it terminate the ransomware. Afterwards, you will be able to use the official Xorist decryptor for free.

You can find CerBerSysLock removal guidelines below this article. You should be aware that ransomware is dangerous. Thus, do not try to uninstall it by yourself. The elimination guide is free, and you should carefully follow it not to skip steps and make sure that your computer is safe.

Hackers send malicious emails to distribute ransomware

Experts from[2] report that users can get infected with file-encrypting viruses via spam emails which hold the malware inside. Usually, the victims are deceived by the letters since they imitate invoiced from famous brands or companies. Thus, once the bogus attachment is opened, ransomware installation begins[3].

Note that malspam campaigns are not the only distribution method employed by the criminals. They might also place the ransomware on sharing sites and trick users into downloading it with the help of a deceptive appearance of the legitimate program. Additionally, sponsored ads can be designed to redirect to a highly suspicious website and infiltrate malware as well.

Therefore, computer users should be extremely careful when browsing the Internet and take every precautionary measure possible. You can protect your computer from infections by following four steps:

  1. Use a robust security software and make sure that is up-to-date;
  2. Avoid downloading programs or files from peer-to-peer (P2P) networks;
  3. Stop clicking on ads which you might encounter on your frequently visited pages;
  4. Never open spam emails or their attachments if you find the letters suspicious.

Learn how to perform CerBerSysLocked removal 

First of all, never try to get rid of the ransomware by yourself. This is a dangerous computer threat, and inappropriate CerBerSysLocked removal can damage not only your files but operating system as well. Likewise, we advise you to get help either from a certified IT professional or employ a powerful security software.

We recommend using Reimage, Malwarebytes MalwarebytesCombo Cleaner, or Plumbytes Anti-MalwareMalwarebytes Malwarebytes since they are reliable and time-tested. Experts note that it will only take several minutes for you to remove CerBerSysLocked and be able to proceed to the data recovery. However, you are free to use any other antivirus system if you are sure that it is trustworthy.

Also, do not forget to check the decryption instructions below. You will find multiple techniques to recover the corrupted data and finally if they do not help you can try official Xorist decryptor. 

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To remove CerBerSysLock virus, follow these steps:

Remove CerBerSysLock using Safe Mode with Networking

If you have noticed that your data is compromised and has .CerBerSysLocked0009881 extension, your PC is infected with ransomware. You should start from rebooting your computer into Safe Mode:

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove CerBerSysLock

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete CerBerSysLock removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove CerBerSysLock using System Restore

In case the first method didn't help you to download the security software, you should try to boot you computer to Safe Mode with Command Prompt.

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of CerBerSysLock. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that CerBerSysLock removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove CerBerSysLock from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by security experts.

If your files are encrypted by CerBerSysLock, you can use several methods to restore them:

You can recover files with Data Recovery Pro

Experts recommend you to try this professional tool if you cannot access your files due to ransomware.

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by CerBerSysLock ransomware;
  • Restore them.

Windows Previous Versions function might be helpful

If you want to recover corrupted files, you should check whether the System Restore function was enabled on your computer before CerBerSysLock infiltration. If it was, follow the instructions below: 

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

Try ShadowExplorer tool

This is a very helpful tool to retrieve compromised data if the ransomware has not deleted Shadow Volume Copies from your computer. 

  • Download Shadow Explorer (;
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

Use Xorist Decryptor

Luckily, Emsisoft has developed an official Xorist decryptor which might help you to recover files after CerBerSysLock attack as well. 

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from CerBerSysLock and other ransomwares, use a reputable anti-spyware, such as Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes

About the author

Ugnius Kiguolis
Ugnius Kiguolis - The mastermind

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