Cezor Ransomware Removal and Decryption

By | Posted on July 6, 2019 |

Cezor Ransomware is another creation of cyber crooks that have polluted the internet with variants of STOP/DJVU malware. Whatever the characteristics of previous versions were similarly applied on this newly released virus. Obviously, to give this edition a new identity, all files infected with the virus will get appended with .cezor file extension. The encryption mechanism of Cezor ransomware remains as it is and still uses complicated encryption technology to deny user’s access to important files from their spoiled computer.

Attackers only provided option for victims to recover .cezor encrypted files is to pay the ransom demand. As always, attackers urge that payment transaction must be made on their assigned processor that uses only Bitcoin currency. Via this method, the digital fraudulent deal goes smoothly without leaving a trace and it will be impossible for authorities to track the recipient of ransom money.

This activity of cyber crooks to rip off money from innocent victims through ransomware is in upward trend and it indicates that this counterfeit business has become their favorite stream for revenues. Thousands of spam email messages with attached malicious code lurks the internet daily and security experts associates these misleading correspondence to the deployment of Cezor ransomware and similar threats.

Cezor Ransomware

As what was observed, attackers can easily entice users to execute the attached file by covering it up as document containing important message from reputable company or organization. Right after user execute the file, Cezor immediately carry on with the encryption of files and generate a ransom note instructing users on the procedures to successfully recover .cezor data.

How to Remove Cezor Ransomware

Ransomware files are placed deeply into the system and on various locations, thus, thorough scanning is vital to totally remove Cezor virus. Aside from our suggested tool, you may also run your own security program.

Though affected files may be impossible to decrypt due to complexity of the encryption, you can still try recovery method like alternative tool, Shadow Explorer or Previous Version as described below.

Stage 1: Scan the Computer with Anti-Malware Tool

1. Download free anti-malware scanner called MalwareBytes Anti-Malware.
Malwarebytes Anti-Malware Download Link (this will open a new window)

2. After downloading, install the program. It may run automatically or you have to double-click on the downloaded file MB3-Setup-[version].exe.

3. Carry out the installation with default setup process.

4. At the last stage of installation process, click the Finish button. The program should launch momentarily.

5. On Malwarebytes Anti-Malware console, select Scan from the menu to see available Scan Method.

6. Next, click on Threat Scan. This is the most complete scan method that will surely find any hidden malicious objects associated to Cezor ransomware.

7. Finally, click on Start Scan begin checking the computer for malware and similar threats.

MBAM-threatscan

8. Once the scan has completed, the tool will display the list of detected threats. Remove all identified malicious items and restart the computer if necessary.

Stage 2: Double-check for Cezor’s leftover with Microsoft’s Malicious Software Removal Tool

1. Download the free scanner called Malicious Software Removal Tool.
Malicious Software Removal Tool Download Link (this will open a new window)

download-msrt

2. The tool automatically checks the operating system and suggest appropriate download version. Click on Download button to begin. Save the file to a convenient location, preferably on Desktop.

3. After downloading the file, Windows will prompt that download has completed. Click Run to start scanning for Cezor ransomware. Another option is to browse the location folder and double click on the file to run.

msrt-icon

4. The tool will display Welcome screen, click Next. Please note the message “This tool is not a replacement for an antivirus product.” You must understand that this program is made specifically to find and remove malware, viruses, Trojans, and other harmful elements on the computer. It was not designed to protect the computer.

msrt1

5. Next, you will see Scan Type. Please choose Full Scan to ensure that all Cezor ransom virus entities and other harmful files left on the computer will be found and removed. For advanced computer user, you can opt for Customized Scan, if there are other drives or folders you wanted to include in this scan.

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6. Full scan may take a while, please wait for Malicious Software Removal Tool to complete the tasks. However, you may cancel the scan anytime by clicking on the Cancel button.

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7. After scanning, the tool will reveal all identified threats. There may be other threats that our first scan fails to detect. Please remove/delete all detected items.

8. When removal procedure is complete, you may now close Malicious Software Removal Tool. We hope that Cezor ransomware have been completely deleted from the computer. Please restart Windows to proceed with the normal operation.

Stage 3 : Unlocking files with Cezor Decryption Tool

So far, this Cezor decryption tool works only for files that were encrypted using offline keys. This happens sometimes if the virus is unable to communicate to remote server to obtain unique keys; instead, it will use offline keys when encrypting files. However, there is a little chance of recovering files using this tool due to limited available offline keys that were integrated with this decryption tool.

For additional information (download link, supported versions, instructions) about StopDecrypter, please proceed to this discussion page.

If you received a message stating that “No keys were found for the following IDs (.Cezor)”, please copy and submit the information to the official download page to include your information (log file) and have it archive in case decryption software becomes available.

StopDecrypter Information

We will update this section once the full decryption tool is on hand. In the meantime, please try other options below.

Option 1: Windows Previous Version Tool

Windows Vista and Windows 7 have a feature called Previous Versions. However, this tool is only usable if restore point was made prior to Cezor ransomware infection. To use this tool and recover files affected by the virus, please follow these steps:

1. Open My Computer or Windows Explorer.

2. Right-click on the affected files or folders. From the drop-down list, please click on Restore previous versions.

3. New window will open display all backup copy of files and folders you wanted to recover. Choose the appropriate file and click on Open, Copy, or Restore. Restoring selected files overwrites the current encrypted files on the computer.

Option 2: Use ShadowExplorer to restore files encrypted by Cezor Ransomware

Just like Previous Version tool, ShadowExplorer is taking advantage of shadow copy created by Windows. This tool allows you to retrieve older version of files before it was encrypted by Cezor ransomware.

1. Download ShadowExplorer from the official web site.

2. Install the program with the default settings.

3. The program should run automatically after installation. If not, double-click on ShadowExplorer icon.

4. You can see the drop-down list on top of the console. Please select proper drive and the most recent point-in-time shadow copies of files you wish to restore prior to Cezor ransomware infection.

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5. Right-click on the Drive, Folder, or File you wish to restore and click Export…

6. Lastly, ShadowExplorer will prompt for location where you want to save the copy of recovered files.

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