Home > Ransomware > Cerber 4.1.1 File Encryption Virus Remove and Restore Files (Updated Cerber v4.1.0)

Cerber 4.1.1 File Encryption Virus Remove and Restore Files (Updated Cerber v4.1.0)

cerber-4-1-1-ransomware-restore-files-sensorstechforum-comYet another update has surfaced online concerning what appears to be one of the biggest ransomware viruses out there – the Cerber virus. Having a powerful scheme to redistribute it’s malicious files, the malware has become very sophisticated and it’s updates are not only on the surface as well. They also seem to include heavy modification of the Windows Registry entries related to the encrypted files. Since Cerber is a ransomware virus that aims to spread very fast users are advised not to open any e-mails that have archives and in them .hta or .wsf files because these are the methods the virus uses to infect computers. Anyone who has already been infected by the updated version of Cerber – 4.1.1 should immediately focus on eliminating the ransomware from your computer and learning more about the threat and how to restore your files by reading the information In this article.

Threat Summary

Name Cerber 4.1.1
Type Ransomware Virus
Short Description This Cerber ransomware variant encrypts files with the RSA or AES ciphers adding four randomly generated A-Z 0-9 characters(ex. .z33f) as a file extension to the encrypted files and asks a ransom payoff for decryption.
Symptoms Files are enciphered and become inaccessible by any type of software. A ransom note with instructions for paying the ransom shows as a “README.hta” file.
Distribution Method Spam Emails, Email Attachments, File Sharing Networks, Malicious Executable in Torrent Trackers.
Detection Tool See If Your System Has Been Affected by malware


Malware Removal Tool

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.
User Experience Join our forum to Discuss Cerber Ransomware.

Cerber 4.1.1 Infection Process Analysis

To better explain how the infection process by this variant of Cerber works, we will take you through it methodologically, based on an average scenario of infection by the 4.1.1 version of this nasty ransomware threat.

Distributing Cerber 4.1.0

Similar to the 4.1.0 version and any v4 variants of Cerber, the ransomware is spread yet again via files that are either malicious .hta(HTML) or .wsf(JavaScript) types of files contained in an archive that is uploaded in a phishing e-mail. The other most probable and reported method on how Cerber may spread is via fake URLs, for example the below displayed fake PayPal web page which may lead to a malicious web link containing a drive-by-download of Cerber:


Another scenario, similar to Locky’s latest iteration is if a user opens a malicious e-mal attachment on a spam e-mail such as the picture below displays:


These massive spam messages are believed to be sent out via the same distributors who are behind the same hacking team who distributed the massive Dridex malware. Once you open the archived file, in there you may find another file that contains absolutely the same name of the malware and may be either .hta or .wsf type of file, but .js and .html files could also be spotted. Here is how a malicious file may look upon opening the archive:


As soon as the inexperienced user opens the malicious file, it may immediately connect to the many remote hosts that are related to Cerber ransomware and download the malicious payload onto the victim’s computer, which consists of the following types of files detected by Malware Traffic Analysis:

Cerber-decryption-instructions-README.hta (63,083 bytes)
Cerber-decryption-instructions.bmp (1,920,054 bytes)
page-from-joellipman.com-with-injected-script.txt (68,401 bytes)
pseudoDarkleech-RIGv-flash-exploit.swf (51,789 bytes)
pseudoDarkleech-RIGv-landing-page.txt (5,119 bytes)
pseudoDarkleech-RIGv-payload-Cerber.exe (347,878 bytes)

What appears to be RIG exploit kit may be used to cause a successful infection by Cerber ransomware. Malware researchers report the following infection process:

2016-10-26-pseudodarkleech-rigv-image-01 Source: malware-traffic-analysis.net

Stage 2: Post Infection Activities

After infection, Cerber v4.1.1 ransomware uses a very specific tactic to attack the unsuspecting user. The ransomware modifies a registry value string in the following location, named MachineGuid with random symbols amongst which is the 4 A-Z, 0-9 file extension randomly generated and used to encrypt files. The registry string is located in the following sub-key:


After this has been done, Cerber 4.1.1. may create additional helper files, known as modules in the following Windows location:


But this is not the only location where the modules may be located. The virus may create modules in the crucial Windows folders as well, like:

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

The malicious executables may contain very particular names, such as the date they are created, completely random names or the following reported names by all v4 version of Cerber.

In addition to the changes the Cerber 4.1.1 ransomware makes, another change is in the wallpaper that virus makes as well, which contains it’s version (4.1.1) in it:


The wallpaper contains URLs to Onion network hosts that lead to payment pages. We opened one particular URL which led us to the following web-page containing Captcha verification which is new for Cerber:


After we logged in the web page, we saw that the virus demands you to pay 0.1196 BTC (around 85 dollars) and the price will most likely double if the deadline of 5 days is not met:


The Cerber 4.1.1 ransomware also has very specific instructions that point to reputable web pages on how to convert money to BitCoin no matter where you are in the world:

“How to get «Cerber Decryptor»?
1. Create a Bitcoin Wallet (we recommend Blockchain.info)
2. Buy necessary amount of Bitcoins
Do not forget about the transaction commission in the Bitcoin network (≈ 0.0005).
Here are our recommendations:
btcdirect.eu – A good service for Europe
bittylicious.com – Get BTC via Visa / MC or SEPA (EU) bank transfer
localbitcoins.com – This service allows you to search for people that want to sell Bitcoins directly (WU, Cash, SEPA, Paypal, etc).
cex.io – Buy Bitcoins using Visa / Mastercard or Wire Transfer.
coincafe.com – It is recommended for the fast and easy service. Payment methods: Western Union, Bank of America, cash through FedEx, Moneygram, and/or wire transfer
bitstamp.net – Old and proven Bitcoin dealer
coinmama.com – Visa/Mastercard
btc-e.com – Bitcoins dealer (Visa/Mastercard, etc.)
Could not find Bitcoins in your region? Try searching here:
buybitcoinworldwide.com International catalog of Bitcoins exchanges
bitcoin-net.com – Another Bitcoins sellers catalog
howtobuybitcoins.info – International catalog of Bitcoins exchanges
bittybot.co/eu – A catalog for the European Union
3. Send 0.1196 to the following Bitcoin address:

Cerber 4.1.1 even has the ability to decrypt one file for free. What is also new about Cerber ransomware is the direct messaging system the virus offers to the victims in case there is a problem:


Similar to other v4 Cerber iterations, 4.1.1 also changes the names of the encrypted files and adds 4 random symbols for a file extension to make them non-recognizable. Encrypted files appear like the following:


Cerber 4.1.1 – Conclusion, File Decryption and Removal

Since this type of Cerber 4.1.1 ransomware is as advanced as the other v4 variants, many researchers feel convinced that it will get even more updates very soon, because of the huge attention Cerber ransomware has been receiving by cyber-security researchers lately. Since the first version of Cerber was successfully decrypted, the cyber-criminals have not only created a virus that is very difficult to decipher but they have also used very powerful distribution methods as well. Security experts strongly advise every user who has been infected by this instance of Cerber to immediately remove it from their computer, instructions for which we have prepared below.

For maximum effectiveness during the removal of Cerber 4.1.1 ransomware, we also strongly advise you to focus on a more automatic approach, using an advanced anti-malware program, that will ensure all of the registry entries and other malicious files belonging to Cerber 4.1.1 are permanently gone. Doing this will also protect your computer from further infections by Cerber 4.1.1 or other malware in the future.

If you are looking for a method to decrypt your files, the best suggestion we could give you is to wait, since this malware has not yet been cracked by malware research experts. It may never be cracked, but it may also be successfully reverse engineered in the near future, because as long as there is code there are also bugs. After the virus files are cracked, malware researchers should be able to develop a decryptor and help you successfully decipher the files.

This is why we have provided the methods that should help you restore your files providing the opportunity comes in step “2. Restore files decrypted by Cerber 4.1.1”. They include web links to two of the major decryptor developers – Kaspersky and Emsisoft, which we advise you to follow regularly. We will also update our blog with article on decryption instructions as soon as there are ones developed for this iteration of Cerber so we advise you to follow this page as well.

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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About the Cerber 4.1.1 Research

The content we publish on SensorsTechForum.com, this Cerber 4.1.1 how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific, adware-related problem, and restore your browser and computer system.

How did we conduct the research on Cerber 4.1.1?

Please note that our research is based on independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware, adware, and browser hijacker definitions.
Furthermore, the research behind the Cerber 4.1.1 threat is backed with VirusTotal https://www.virustotal.com/gui/home/upload.
To better understand this online threat, please refer to the following articles which provide knowledgeable details.


1.Browser Redirect – What Is It?
2.Adware Is Malicious, and It Uses Advanced Techniques to Infect
3.The Thin Red Line Between Potentially Unwanted Programs and Malware
4.The Pay-Per-Install Affiliate Business – Making Millions out of Adware
5.Malicious Firefox Extensions Installed by 455,000 Users Blocked Updates

How to Remove Cerber 4.1.1 from Windows.

Step 1: Boot Your PC In Safe Mode to isolate and remove Cerber 4.1.1


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 Cerber 4.1.1 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 Cerber 4.1.1 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 Cerber 4.1.1 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 Cerber 4.1.1 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.

Video Removal Guide for Cerber 4.1.1 (Windows).

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Get rid of Cerber 4.1.1 from Mac OS X.

Step 1: Uninstall Cerber 4.1.1 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 Cerber 4.1.1:

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 Cerber 4.1.1. 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 Cerber 4.1.1. 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 Cerber 4.1.1 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 Cerber 4.1.1. 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.

Step 2: Scan for and remove Cerber 4.1.1 files from your Mac

When you are facing problems on your Mac as a result of unwanted scripts and programs such as Cerber 4.1.1, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.

Click the button below below to download SpyHunter for Mac and scan for Cerber 4.1.1:


SpyHunter for Mac

Video Removal Guide for Cerber 4.1.1 (Mac)

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Remove Cerber 4.1.1 from Google Chrome.

Step 1: Start Google Chrome and open the drop menu

Step 2:Move the cursor over "Tools" and then from the extended menu choose "Extensions"

Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.

Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Erase Cerber 4.1.1 from Mozilla Firefox.

Step 1: Start Mozilla Firefox. Open the menu window

Step 2: Select the "Add-ons" icon from the menu.

Step 3: Select the unwanted extension and click "Remove"

Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.

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Uninstall Cerber 4.1.1 from Microsoft Edge.

Step 1: Start Edge browser.

Step 2: Open the drop menu by clicking on the icon at the top right corner.

Step 3: From the drop menu select "Extensions".

Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.

Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Remove Cerber 4.1.1 from Safari.

Step 1: Start the Safari app.

Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.

Step 3: From the menu, click on "Preferences".

stf-safari preferences

Step 4: After that, select the 'Extensions' Tab.


Step 5: Click once on the extension you want to remove.

Step 6: Click 'Uninstall'.

stf-safari uninstall

A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the Cerber 4.1.1 will be removed.

How to Reset Safari
IMPORTANT: Before resetting Safari make sure you back up all your saved passwords within the browser in case you forget them.

Start Safari and then click on the gear leaver icon.

Click the Reset Safari button and you will reset the browser.

Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer Stop Push Pop-ups

Eliminate Cerber 4.1.1 from Internet Explorer.

Step 1: Start Internet Explorer.

Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'

Step 3: In the 'Manage Add-ons' window.

Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.

Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.

Remove Push Notifications caused by Cerber 4.1.1 from Your Browsers.

Turn Off Push Notifications from Google Chrome

To disable any Push Notices from Google Chrome browser, please follow the steps below:

Step 1: Go to Settings in Chrome.


Step 2: In Settings, select “Advanced Settings”:

advanced settings

Step 3: Click “Content Settings”:

Content Settings

Step 4: Open “Notifications”:


Step 5: Click the three dots and choose Block, Edit or Remove options:

Block, Edit or Remove

Remove Push Notifications on Firefox

Step 1: Go to Firefox Options.


Step 2: Go to “Settings”, type “notifications” in the search bar and click "Settings":


Step 3: Click “Remove” on any site you wish notifications gone and click “Save Changes”

remove push notifications firefox

Stop Push Notifications on Opera

Step 1: In Opera, press ALT+P to go to Settings.


Step 2: In Setting search, type “Content” to go to Content Settings.

content settings

Step 3: Open Notifications:


Step 4: Do the same as you did with Google Chrome (explained below):

three dots

Eliminate Push Notifications on Safari

Step 1: Open Safari Preferences.


Step 2: Choose the domain from where you like push pop-ups gone and change to "Deny" from "Allow".

Cerber 4.1.1 FAQ

What is Cerber 4.1.1?

The Cerber 4.1.1 threat is adware or browser redirect virus. It may slow your computer down siginficantly and display advertisements. The main idea is for your information to likely get stolen or more ads to appear on your device.

The creators of such unwanted apps work with pay-per-click schemes to get your computer to visit risky or different types of websites that may generate them funds. This is why they do not even care what types of websites show up on the ads. This makes their unwanted software indirectly risky for your OS.

What are the symptoms of Cerber 4.1.1?

There are several symptoms to look for when this particular threat and also unwanted apps in general are active:

Symptom #1: Your computer may become slow and has poor performance in general.

Symtpom #2: You have toolbars, add-ons or extensions on your web browsers that you don't remember adding.

Symptom #3: You see all types of ads, like ad-supported search results, pop-ups and redirects to randomly appear.

Symptom #4: You see installed apps on your Mac running automatically and you do not remember installing them.

Symptom #5: You see suspicious processes running in your Task Manager.

If you see one or more of those symptoms, then security experts reccomend that you check your computer for viruses.

What types of Unwanted Programs are there?

According to most malware researchers and cyber-security experts, the threats that can currently affect your Mac can be the following types:

  • Rogue Antivirus programs.
  • Adware.
  • Browser hijackers.
  • Clickers.
  • Fake optimizers.

What to do if I have a "virus" like Cerber 4.1.1?

Do not panic! You can easily get rid of most adware or unwanted program threats by firstly isolating them and then removing them from your browser and computer. One reccomended way to do that is by using a reputable malware removal software that can take care of the removal automatically for you. There are many anti-malware apps out there that you can choose from. SpyHunter is one of the reccomended anti-malware apps, that can scan your computer for free and detect any viruses, tracking cookies and unwanted adware apps and eliminate them quickly. This saves time when compared to doing the removal manually.

How to secure my passwords and other data from Cerber 4.1.1?

With few simple actions. First and foremost, it is imperative that you follow these steps:

Step 1: Find a safe computer and connect it to another network, not the one that your Mac was infected in.

Step 2: Change all of your passwords, starting from your e-mail passwords.

Step 3: Enable two-factor authentication for protection of your important accounts.

Step 4: Call your bank to change your credit card details (secret code, etc.) if you have saved your credit card for online shopping or have done online activiites with your card.

Step 5: Make sure to call your ISP (Internet provider or carrier) and ask them to change your IP address.

Step 6: Change your Wi-Fi password.

Step 7: (Optional): Make sure to scan all of the devices connected to your network for viruses and repeat these steps for them if they are affected.

Step 8: Install anti-malware software with real-time protection on every device you have.

Step 9: Try not to download software from sites you know nothing about and stay away from low-reputation websites in general.

If you follow these reccomendations, your network and all devices will become significantly more secure against any threats or information invasive software and be virus free and protected in the future too.

More tips you can find on our website, where you can also ask any questions and comment underneath the articles about your computer problems. We will try to respond as fast as possible.

1 Comment
  1. Pedro Gonzalez

    aún no se sabe nada de como decifrar el cerber 4.1.1???


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