Remove Mkos Ransomware (Decrypt .mkos Files)

Ransomware infection from STOP/DJVU family is on the rise again and on this day, malware researchers just discovered a variant tagged as Mkos. Obviously, this crypto-virus was named that way because it appended all infected files with .mkos extension. The same approach goes with older variants as Hets, Merl, and Gesd. Aside from transforming the file name, Mkos ransomware did one thing complicated that made the data unusable and that is by encrypting them with sophisticated algorithm. This complete messing up of file structure will require a combination of decryption tool and private key in order for victims to restore all .mkos files to their original format. Unfortunately, it is presently in the possession of attackers.

As stated in the ransom note, which can be found on the same exact location as infected files, victims may avail the recovery tools but they must send the payment that costs $980. Though, attackers can reduce the ransom payment into half if victims can communicate with them or transact the payment within 72 hours after the initial infection.

Computer users and Mkos ransomware victims must know that paying the ransom money do not guarantee recovery of the entire encrypted files. In fact, there is no assurance that attackers are willing to send the Mkos decryption tool and private key after victims made a successful payment. Keep in mind that dealing with people that operates in dark part of the web often end up in fraudulent transaction. Thus, computer security experts do not recommend this option. Instead, they suggest archiving all infected files while waiting for the official and free Mkos decryption tool.

Mkos Ransomware

So far, the current available recovery software can decrypt STOP ransomware variants that were encrypted using offline keys. More about this tool on the next section including ways to remove Mkos ransomware.

How to Remove Mkos Ransomware

Ransomware files are placed deeply into the system and on various locations, thus, thorough scanning is vital to totally remove Mkos 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 MBSetup.exe.

3. Carry out the installation with default setup process.

4. After the installation process, click the Get Started button to launch the program.

5. Continue with the prompts until the main program opens.

6. On the main console, click on Scan to run most complete detection method to find hidden objects associated to Mkos ransomware.

7. Scanning may take a while. Please wait until the anti-malware tool is done with the checking.


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 Mkos’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)


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 Mkos ransomware. Another option is to browse the location folder and double click on the file to run.


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.


5. Next, you will see Scan Type. Please choose Full Scan to ensure that all Mkos 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.


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.


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 Mkos ransomware have been completely deleted from the computer. Please restart Windows to proceed with the normal operation.

Stage 3 : Unlocking files with Mkos Decryption Tool

Tools that may decrypt files infected by Mkos is not yet available at this time. We will update this section once the tool is on hand. In the meantime, please try the 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 Mkos 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 Mkos 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 Mkos 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 Mkos ransomware infection.


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.

Post Last Modified On December 16, 2019

1 thought on “Remove Mkos Ransomware (Decrypt .mkos Files)”

  1. The mkos virus is my problem too. This virus .dwg .pdf .jpeg .xls .doc infected with mpeg and all similar file formats. It has about 750GB of data. my entire working life is in this disc.
    Please! What should I do?

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