Mosk Ransomware (.mosk File Virus) – Remove It + Recover Data

.mosk File Virus is the recent addition to the STOP Ransomware group. It is noxious data locker malware that can intrude your PC without permission and encode all your files using a powerful encryption algorithm. Upon successful encryption of your files, it will add .mosk extension to the end of all your file names. For an example, the file “myphoto.jpg” when encoded by mosk virus, will get converted in to “myphoto.jpg.mosk” and you will need a private decryption key to access such files. This dubious threat will also leave “_Readme.txt” ransom note in every folder to demand ransom money in return of that decryption key.

mosk file virus

.mosk File Virus is a destructive Ransomware infection. It is real threat for any Windows computer system. It is pernicious file encrypting virus that can intrude your computer very easily. This malign threat can invade your system security without permission and take your files on hostage. The main motive of cyber crooks behind this dubious ransomware infection is to make illegal profit by luring innocent PC users. Once installed on your system, this nasty .mosk File Virus will scan your PC your files and encrypt all your data. It is able to infect all kind of system files including videos, images, audios, MS word documents, excel files, ppt, pdf, txt, html and many more.

.mosk File Virus : Threat Analysis

Name mosk Ransomware, .mosk File Virus, .mosk Extension Virus
Type Ransomware
Extension .mosk
Family STOP (Djvu) Ransomware
Ransom Amount $490 – $980 USD in BitCoins
Short Description mosk Ransomware encrypt all your files by adding .mosk extension and demand ransom money to give decryption key.
Symptoms You will not be able to access any files on your system. You will find Ransom note in each folder demanding money.
Distribution Method Freeware Installations, Bundled Packages, spam emails, cracked software, illegal patches
Removal Tool Download Automatic Malware Removal Tool
Data Recovery Download Data Recovery Pro Now

This harmful .mosk File Virus mainly get delivered to the infected computer through spam emails. This is the most used method for spreading viruses and malware. It is one of the oldest methods used by cyber criminals and still it is effective. You should not open any suspicious email from unknown sender that contain any attachment. Your system can also get infected by this threat when you browse to malicious website or use drive by download websites. Apart from this, .mosk File Virus can also get distributed via Trojan downloaders and other malicious threat that inject viruses on the compromised machine. This nasty threat was first discovered by a security researcher named Michael Gillespie and since then hackers have launched around 180 different version of this malware.

Once installed on your system, .mosk File Virus will encrypt all your data. This dubious threat will change the desktop background of your computer to notify you about the encryption. It will also leave a ransom note on your computer screen in html or text format to inform you about the decryption. It will ask you to pay the ransom money withing fixed time to get your files. Hackers behind .mosk File Virus will also threat users to delete the decryption key permanently if they don’t pay the money, so they can never restore their files but even after paying the ransom money, they will not give users the decryption key. You should not encourage hackers by paying the ransom. This nasty threat will not decrypt your files after getting paid. Hackers behind this threat are only interested in your money and once you pay them, you will become their regular victim. Threats like this uses multiple variants to extort money from same victims again and again. Take a look on the ransom note left by .mosk File Virus on your system:


Don't worry, you can return all your files!
All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.

To get this software you need write on our e-mail:

Reserve e-mail address to contact us:

Our Telegram account:

If your computer is infected by .mosk File Virus and all your files are encrypted, then first of all make backup of all your encrypted data on any cloud drive for safety. Now you should firstly consider deleting this nasty ransomware infection completely from your system then after you can try other alternative data recovery methods. Usually it is not easy to recover encrypted files because the algorithm used by hackers are quite strong but data recovery software also use very sophisticated level of hard drive scanning. Data recovery pro is a powerful software which can even recover files from formatted or corrupt drives, and it has proven that it is quite effective in ransomware attack situation also. You can give it a try and if it is not able to recover all your files, you can wait for any decryptor to be launched in future as you have backup of encrypted files. So follow this guide to remove .mosk File Virus and recover your files without paying ransom money to hackers.

Remove .mosk File Virus Manually

(Note :- If you are computer expert then only continue with manual process. Any little mistake can cause major damage to your system. Make sure that you are capable of reversing the process if any thing goes wrong. Also bookmark this page before starting the process because you might need to restart your PC or close the browser.)

Step 1 – Start PC in Safe Mode With Networking

  • Press “Windows Key and R” buttons on your keyboard.

Windows + R keys

  • Type “msconfig” into Run box and click OK button.


  • “System configuration box” will appear on your PC.

system configuration box

  • Go to “boot” tab and select “safe boot” option and press “Ok”.

safe boot to remove .mosk File Virus

Step 2 – End Malicious Process In Task Manager

  • Press “Windows and R” keys together on your keyboard.

Windows + R Keys

  • Type “taskmgr” into Run box and click OK button.


  • Find .mosk File Virus related process > Go to Details tab > right click on it and press End Process button.

End .mosk File Virus Related process

Step 3 – Remove .mosk File Virus From Control Panel

Remove .mosk File Virus From Windows XP

  • Click on Start Menu and select Control Panel option.

Windows XP start button

  • Choose Add or Remove Programs option.

Windows XP add or remove programs mosk File Virus

  • Find .mosk File Virus related Program and click on Remove button.

Remove .mosk File Virus From Windows XP

Remove .mosk File Virus From Windows Vista

  • Go to Start Menu and choose Control Panel option.

Windows Vista start button

  • Select Uninstall a program option under the Programs category.

Windows Vista add or remove program mosk File Virus

  • Find and Uninstall .mosk File Virus related program completely.

Remove .mosk File Virus From Windows Vista

Remove .mosk File Virus From Windows 7

  • Click on Start button (Windows logo) and choose Control Panel option.

Windows 7 start button

  • Select Uninstall A Program option under Programs category.

Windows 7 uninstall a program mosk File Virus

  • Find .mosk File Virus related program and click on Uninstall button.

Uninstall .mosk File Virus From Windows 7

Remove .mosk File Virus From Windows 8

  • Click on “Win + R” simultaneously on keyboard.

Windows + R keys

  • Type “appwiz.cpl” in Run Box and Click OK button.


  • Choose .mosk File Virus related program and click on Uninstall button.

Remove .mosk File Virus From Windows 8

Remove .mosk File Virus From Windows 10

  • Click on Start menu and select Settings option.

Windows 10 start button

  • Now Click on App & Features option.

Apps & Features Windows 10

  • Find .mosk File Virus related program and click on Uninstall button.

Delete .mosk File Virus From Windows 10

Step 4 – Remove .mosk File Virus From Your Browsers

Remove .mosk File Virus From Google Chrome

  • Run the Google Chrome browser and click on “Menu” button from upper right corner.
  • Select “More tools” and click on Extensions option.
  • You will find All the extensions installed on your browser.
  • Select all .mosk File Virus related malicious extension and click the “trash can icon”.

Remove .mosk File Virus From Chrome

Remove .mosk File Virus From Mozilla Firefox

  • Run the Mozilla Firefox browser and click on “Menu” button from upper right corner.
  • Select “Add-ons” and click on “Extensions” or “Add-ons manage” option.
  • You will find All the extensions installed on your browser.
  • Select all .mosk File Virus related malicious extension and click on the “Remove” button.

Delete .mosk File Virus From Firefox

Remove .mosk File Virus From Microsoft Edge

  • Open MS Edge browser and Click on More Tools from button from upper right corner.
  • Now choose “Extensions” option from drop down menu.
  • You will find All the extensions installed on your browser.
  • Select all .mosk File Virus related malicious extension and click on “Uninstall” button.

Uninstall .mosk File Virus From Edge

Remove .mosk File Virus From Internet Explorer

  • Run the Internet Explorer browser and click on “Menu” button from upper right corner.
  • Now you have to select the “manage Add-ons” option.
  • You will find All the extensions installed on your browser.
  • Select any .mosk File Virus related malicious extension and click the “Disable” button.

Remove .mosk File Virus From IE

Remove .mosk File Virus From Safari Browser

  • Open Safari browser and select “Preferences” from the Safari menu.
  • Go to the “Extensions” tab to list all the installed extensions.
  • Select and remove any .mosk File Virus related malicious program completely.

Uninstall .mosk File Virus From Safari

Step 5 – Remove .mosk File Virus From Registry Editor

  • Click on “Windows and R” keys together on keyboard.

Windows + R keys

  • Type “regedit” in Run Box and click OK button.


  • Find and remove all .mosk File Virus related entries.

Remove .mosk File Virus From Registry editor

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msmpeng.exe “Debugger” = ‘svchost.exe’

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msseces.exe “Debugger” = ‘svchost.exe’

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\.mosk File Virus


HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings “WarnOnHTTPSToHTTPRedirect” = ’0′

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings “WarnOnHTTPSToHTTPRedirect” = ’0′

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore “DisableSR ” = ’1′

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ekrn.exe “Debugger” = ‘svchost.exe’

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “3948550101?

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “xas”

HKEY_CURRENT_USER\Software\.mosk File Virus

Step 6 – Find and delete malicious files generated by this threat in the paths listed below:

%Temp%\[malware name]

%AppData%\[malware name]

%LocalAppData%\[malware name]

%LocalAppData%\[malware name].exe

%CommonAppData%\[malware name]


Optional – Reset Your Browser After Removing Infection

You can reset your browser to remove all the left overs of .mosk File Virus virus that can bring this infection back to your system. It might not be very important but it is the first step to secure your PC. Once you will reset your browser, you can freely browse Internet without any tension.

Reset Google Chrome Web Browser

  • Open Chrome browser >> click on “menu” >> select “settings” option.
  • Go to the end of the page >> click on “Show Advanced settings”.
  • From bottom the page, click on “Reset Settings” button.

Reset chrome

Reset Mozilla Firefox Browser

  • Open Firefox browser >> click on “Menu” >> select (?) icon.
  • Now select “Troubleshooting Information” option.
  • Click on “Refresh Firefox” button and give your confirmation.

Reset Firefox

Reset Internet Explorer Browser

  • Open Internet Explorer >> click on “Gear” icon >> select “Internet options”.
  • Now go to the “Advanced” tab >> click on “Reset” button.
  • Choose “Delete personal settings” >> press “Reset” button.

Reset IE

Reset MS Edge Browser

  • Open Edge browser >> click on “more icon” >> select “settings”.
  • Now you have to select “Choose what to clear” Option.
  • Choose “first three options” >> click on “Clear” button.

Reset Edge

Reset Safari To Default

  • Open “safari” browser >> Click on “Safari” menu >> select “Reset Safari” option.
  • Select the preferred options you want to clear >> finally click on Reset button.

Reset safari

Enable Phishing And Malware Protection

Turn On Safe Browsing Features to protect your computer from any malicious or phishing website that can bring nasty viruses like .mosk File Virus on your computer.

Google Chrome – Dangerous Sites Protection

  • Open your Google Chrome browser.
  • Type “chrome://settings” in address bar and press Enter.
  • Click on “Show advanced settings” option from the bottom of the page.
  • Find Privacy section and mark ‘Protect you and your device from dangerous sites’.

Chrome safety From .mosk File Virus

Mozilla Firefox – Block Attack Sites and Web Forgeries

  • Open Mozilla Firefox browser.
  • Click on Menu and select Options from the list.
  • Select Security and check following items:

Firefox safety From .mosk File Virus

  1. Warn me when sites try to install add-ons
  2. Block reported attack sites
  3. Block reported web forgeries

Edge Browser – SmartScreen Filter

  • Open Microsoft Edge browser.
  • Click on More icon from upper right corner of the screen.
  • Choose Settings option from the drop-down list.
  • Scroll down and click on View Advanced Settings.
  • Turn ON the “help protect my PC from malicious sites and downloads with SmartScreen Filter” option.

Edge safety from .mosk File Virus

Internet Explorer – Activate SmartScreen Filter

  • Please open Internet Explorer browser.
  • Go to Tools menu and navigate to Safety option.
  • Select SmartScreen Filter from the drop-down list.
  • Turn on SmartScreen Filter and restart your browser.

IE safety from .mosk File Virus

Tips To Prevent Threats Like .mosk File Virus in Future

  • Use powerful anti-virus program to scan your PC regularly.
  • Make sure Windows Firewall security enabled and turn it on.
  • Avoid visiting malicious or porn websites regularly.
  • Never download free program from unreliable sites.
  • Do not download cracked software, themes and similar products.
  • Don’t get attracted by misleading ads that flash on your browser.
  • Keep your Windows OS and other software up to date.
  • Download updates only from official websites.
  • Create a system restore point for security purpose.
  • Keep backup of your important files and data.

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