.CerBerSysLocked Files Virus – How to Remove and Restore Data

This article aims to show you how to remove the CerBerSysLocked ransowmare virus from your computer (Xorist variant) and how to restore files that have been encrypted with the .CerBerSysLocked0009881 file extension added to them.

New variant of the Xorist ransomware family known as CerBerSysLocked malware has been reported to infect the computers of unsuspecting victims after which add the .CerBerSysLocked file extension with random numbers to the files which have been encrypted by this threat. The virus aims to also drop a ransom note file, named HOW TO DECRYPT FILES.txt which has the one and only purpose of trying to convince victims into paying a hefty ransom fee in order to get the encrypted files restored by the cyber-criminals and become openable once more.

Threat Summary

Name CerBerSysLocked
Type Ransomware, Cryptovirus
Short Description A Xorist ransomware variant. Encrypts the files on your computer after which aims to get you to pay a hefty ransom fee in order to get them decrypted once more.
Symptoms Aims to encrypt the files on the infected computer, adding the .CerBerSysLocked0009881HOW TO DECRYPT FILES.txt ransom note.
Distribution Method Spam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by malware


Malware Removal Tool

User Experience Join Our Forum to Discuss CerBerSysLocked.
Data Recovery Tool Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

.CerBerSysLocked0009881 – How Does It Infect

The primary infection process of .CerBerSysLocked0009881 files virus is conducted via e-mail spam campaigns that may distribute a variety of different spam e-mails accros a lot of users who are deceived into thinking that the e-mails are legitimate and open the malicious infection file that is either uploaded as an attachment or linked on an external website. Here is an example of how such an e-mail may appear:

In addition to via spam e-mails the .CerBerSysLocked0009881 files virus may also be spread via other methods, such as:

  • Via fake software setups.
  • Fake game patches or cracks.
  • Fake License activation software.
  • Key generators.

.CerBerSysLocked0009881 Files Virus – More Information

Once the malicious executable of this ransomware virus is opened on your computer, it may immediately drop the malicious files in the following Windows directories:

  • %AppData%
  • %Temp%
  • %Roaming%
  • %Common%
  • %System32%
  • %Local%
  • %LocalLow%

The files that are dropped by this ransomware are two executables, which have completely random names. In addition to them, the ransomware virus may also attack the Windows Registry sub-keys, that responisble for it’s files to automatically run on system boot. This results in the malware leaving registry entries with the location of the malicious file it wants to run automatically in a value string that is located within the following sub-keys:

→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

In addition to this, the ransomware may also attack other aspects of the infected computer, such as delete the backed up files or shadow volume copies of the infected computer. This Is done by executing the following commands as an administrator without the user noticing them:

→ process call create “cmd.exe /c vssadmin.exe delete shadows /all /quiet & bcdedit.exe /set {default} recoveryenabled no & bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures”

In addition to this, the malware also drops a ransom note in the face of HOW TO DECRYPT FILES.txt document, which contains the following message:

Problem with your Files ?
Don’t worry! Your files are SAFE!
Files are Backed up by our Service!
You need to buy Cerber Decryptor v5.0 updated 2017-November
The only way to decrypt your files is to receive the private key and decryption program.
Contact Email :
Subject PRIVATE-ID: CerBerSysLocked0009881

CerBerSysLock Ransomware – Encryption Process

The encryption process of the CerBerSysLock ransom virus is conducted via the XOR encryption algorithm. The virus firstly scans for the most commonly used file types on your computer, among which are the following:

  • Images.
  • Audio files.
  • Videos.
  • Documents.
  • Archives.

The CerBerSysLock virus is very careful not to scan for files, located In the %Windows% and %Program Files% directories as they may damage drivers and other key software, which may break your OS. After the files are detected, the CerBerSysLock ransomware applies the encryption process and the files can no longer be opened. They appear similar to the image below:

Remove CerBerSysLock Ransomware and Restore Your Files

If you want to remove this ransomware virus from your computer, we recommend that you follow the removal manual below. It has been divided in manual and automatic removal steps and if you lack the experience in removing CerBerSysLock ransomware manually, security experts often advise to use an advanced anti-malware program in order to remove this malware automatically from your computer system. Having such tool will also protect your computer against future intrusions, like CerBerSysLock ransomware as well.

If you want to restore files that have been encrypted by this ransomware virus, be advised that you should try the alternative methods for recovery in step “2. Restore files encrypted by CerBerSysLock” below to attempt and recover as many encrypted files as possible.


Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.


with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy

Windows Mac OS X

How to Remove CerBerSysLocked from Windows.

Step 1: Boot Your PC In Safe Mode to isolate and remove CerBerSysLocked


Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R

2. The "Run" Window will appear. In it, type "msconfig" and click OK.

3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

4. When prompted, click on "Restart" to go into Safe Mode.

5. You can recognise Safe Mode by the words written on the corners of your screen.

Step 2: Uninstall CerBerSysLocked and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:

1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.

2. In the field type in "appwiz.cpl" and press ENTER.

3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.

Step 3: Clean any registries, created by CerBerSysLocked on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by CerBerSysLocked there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.

2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.

3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for CerBerSysLocked with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.

It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

2. After you have installed SpyHunter, wait for it to update automatically.


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.


If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by CerBerSysLocked.

Ransomware infections and CerBerSysLocked aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

Windows Mac OS X

Get rid of CerBerSysLocked from Mac OS X.

Step 1: Uninstall CerBerSysLocked and remove related files and objects

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy

1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:

2. Find Activity Monitor and double-click it:

3. In the Activity Monitor look for any suspicious processes, belonging or related to CerBerSysLocked:

Tip: To quit a process completely, choose the “Force Quit” option.

4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.

5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to CerBerSysLocked. If you find it, right-click on the app and select “Move to Trash”.

6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to CerBerSysLocked. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.

7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove CerBerSysLocked via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as CerBerSysLocked. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents

Tip: ~ is there on purpose, because it leads to more LaunchAgents.

Click the button below below to download SpyHunter for Mac and scan for CerBerSysLocked:


SpyHunter for Mac

Step 3 (Optional): Try to Restore Files Encrypted by CerBerSysLocked.

Ransomware infections and CerBerSysLocked aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

CerBerSysLocked FAQ

What is CerBerSysLocked ransomware and how does it work?

CerBerSysLocked is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does CerBerSysLocked ransomware infect my computer?

Via several ways.CerBerSysLocked Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of CerBerSysLocked is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open .CerBerSysLocked files?

You can't. At this point the .CerBerSysLocked files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your .CerBerSysLocked files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by CerBerSysLocked ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore ".CerBerSysLocked" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .CerBerSysLocked files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of CerBerSysLocked ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate CerBerSysLocked ransomware and then remove it without causing any additional harm to your important .CerBerSysLocked files.

Also, keep in mind that viruses like CerBerSysLocked ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

  • Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
  • Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
  • Also, check if some of the files that were encrypted it can be re-downloaded from the web.
  • Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
  • You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.

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