How to remove Wanna Decrypt0r 4.0 ransomware?

Also Known As: Wanna Decrypt0r 4.0 virus
Distribution: Low
Damage level: Severe

Wanna Decrypt0r 4.0 ransomware removal instructions

What is Wanna Decrypt0r 4.0?

Wanna Decrypt0r 4.0 is a malicious program, belonging to the Jigsaw ransomware family. It impersonates the WannaCry malware. Discovery is credited to dnwls0719. This ransomware encrypts the data of infected systems in order to demand a ransom to be paid for the decryption. During the encryption process, all files are appended with the ".WNCRY" extension. For example, a file originally titled "1.jpg" would appear as "1.jpg.WNCRY" - following encryption. After this process is complete, a pop-up window is displayed.

The text presented in the pop-up window informs victims that all of their data has been encrypted. The only method of recovering the files is purchasing a unique decryption key from the cyber criminals behind the infection. According to the ransom note, attempting manual decryption or using third party decryption services will result in the affected data be deleted. Restarting and/or turning off the device - will result in the same outcome. Additionally, if users do not comply with the demands of the criminals, an unspecified number of files will be deleted every hour. To get the unique key, victims are instructed to write to the provided email address. The title/subject of the letters is to be "Custom Decryption Key" and the date of the infection. The email must also contain proof of the payment. The ransom has to be paid in Bitcoin cryptocurrency; the message lists instructions how to and websites from where users can obtain said digital currency. Users are told to transfer 30 USD in Bitcoins, though further in the note it is stated that victims are to send at least 50 dollars worth. Decryption can be tested before the infection, by sending the criminals two encrypted files via email. Unfortunately, in most cases of ransomware infections, without interference of the cyber criminals responsible - decryption is impossible. It can be, if the malicious program in question is still in development and/or has bugs (flaws). Regardless of the circumstances, it is strongly advised against communicating with and/or paying criminals. Since often, despite meeting the ransom demands - victims do not receive the tools/software necessary for the decryption. Therefore, the files remain encrypted and beyond repair, and users experience financial losses. Removing Wanna Decrypt0r 4.0 form the operating system will prevent it from further encryptions, however removal will not restore already compromised data. The only viable solution is recovering the files from a backup. Provided, if one was created prior to the infection and was stored in a separate location.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Wanna Decrypt0r 4.0 decrypt instructions (pop-up)

SekhmetTaargo.2020 and Mado are a few examples of other ransomware-type programs. They are designed to encrypt data and demand payment for the decryption tools/software. Crucial differences in-between them include: the cryptographic algorithm they use (symmetric or asymmetric) and the ransom size. These sums typically range from three to four digits (in USD). Cyber criminals prefer the payments to be made in digital currencies (mainly, cryptocurrencies), due to transactions of them being difficult/impossible to trace. To avoid permanent data loss, it is highly recommended to keep backups in remote servers and/or unplugged storage devices (ideally, in multiple different locations).

How did ransomware infect my computer?

Ransomware and other malware is proliferated in a variety of ways, primarily via trojans, spam campaigns, illegal activation tools ("cracks"), illegitimate updates and untrustworthy download channels. Trojans are malicious programs, capable of causing chain infections (i.e. download/install additional malware). The term "spam campaign" defines large scale operations, during which deceptive/scam emails are sent by the thousand. This mail is usually disguised as "official", "important". "priority", "urgent" and similar. These letters have infectious files attached to or linked inside them. Virulent files can be in various formats (e.g. Microsoft Office and PDF documents, archive and executable files, JavaScript, etc.); when they are executed, run or otherwise opened - it initiates the infection process. Rather than activate licensed product, illegal activation ("cracking") tools can download/install malicious software. Fake updaters infect systems by abusing flaws of outdated products and/or by simply installing malware instead of the promised updates. Malicious content can be unintentionally downloaded from untrustworthy sources (e.g. unofficial and free file-hosting sites, Peer-to-Peer sharing networks and other third party downloaders).

Threat Summary:
Name Wanna Decrypt0r 4.0 virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .WNCRY
Ransom Demanding Message Text presented in the pop-up window.
Ransom Amount >50 USD in Bitcoin cryptocurrency
Cyber Criminals' Cryptowallet Address 17oxVvxYfRfDwn4i3nnDwqfSV27sBHUAZi (Bitcoin)
Cyber Criminal Contact
Detection Names Avast (Win32:RansomX-gen [Ransom]), BitDefender (Generic.MSIL.Ransomware.Jigsaw.BF33A48B), ESET-NOD32 (A Variant Of MSIL/Filecoder.Jigsaw.B), Kaspersky (HEUR:Trojan.Win32.Generic), Full List Of Detections (VirusTotal)
Rogue Process Name Windows Defender (process name may vary)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
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To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

How to protect yourself from ransomware infections?

Dubious and/or irrelevant emails should not be opened, especially any attachments or links present it them - as that can result in a malware infection. It is recommended to only use official and verified download channels. It is just as important to activate and update software with tools/functions, provided by legitimate developers. Illegal activation tools ("cracks") and third party updaters should not be used, as they are often used to proliferate high-risk content. It is paramount to device/user safety to have a reputable anti-virus installed; it should be kept updated, used to run regular system scans and to remove detected/potential threats. If your computer is already infected with Wanna Decrypt0r 4.0, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in Wanna Decrypt0r 4.0 ransomware's pop-up window:

Wanna Decrypt0r 4.0


Ooops, your files have been encrypted!_

What Happened to My Computer?


Attention, please read the following information very carefully.

Your important files, photos, videos, documents, downloads and browsing history are encrypted and locked. They are no longer accessible.

We understand how important your files are, so that is why we have written instructions below in order to restore your files. To access your files again, you will need a custom decryption key which is only generated and provided by us. Your files cannot be recovered without this.

If you seek help from a computer technician, any attempt to move the decryptor will be detected. Subsequently, a computer technician cannot access your files without this decryption key.

Manual removal, restoring/turning your computer off or any attempts to remove the decryptor will result in permanent deletion of your files; these cannot be recovered. A custom decryptor key (that is generated by us) is the only way to access your files again. Furthermore, a portion of your files will be deleted every 60 minutes unless you comply with the below instructions.


Can I Recovery My Files?


We guarantee that you can recover all your files safely and easily. Firstly, you will need to send an email to: with the subject line "Custom Decryption Key" alongside the date in which you got infected. Payment confirmation must be within email. You will receive a response with a custom decryption key which will allow you to access all of your files again.


How Can I Pay?

Payments are only accepted in Bitcoin. For further information on Bitcoin, click on "What is Bitcoin?" to the left. Payments may be negotiable after discussion.


Step 1: Go to hxxps:// or another Bitcoin partner (a list of exchange sites can be found here: hxxps://
Subsequently, if you already have a Bitcoin wallet, skip to 'Step 4.'
Step 2: Create an account.
Step 3: Buy Bitcoins for the selected amount below (or negotiable amount).
Step 4: Send $30 worth of Bitcoin to the Bitcoin address below.
For further information on how to send Bitcoin, please watch the following: hxxps://


How can I trust that my files will be restored and that this threat is valid?

To ensure that we are true to our word, we can decrypt 2 files of choice for free; please send this to the above email address. If you do not believe the validity of this threat, we cannot convince you otherwise.


However, you have been warned that your files will be permanently deleted if the decryptor is manually removed, so please tread with caution. We do not want that to happen to you, so please do not take this threat lightly as we understand how important your files are. We guarantee that your files will be safely restored upon payment with no further threat or harm to your computer. 
Caution in this variant the servers that check payments are under maintenance, therefor contact us by email if you make a payment


Please, send at least $50 worth of Bitcoin



Check Payment

1 file will be deleted.
View encrypted files
1. What Is Bitcoin?
2. Where can I buy Bitcoin?
3. How do I send Bitcoin?
4. What is WannaCry Ransomware?

Decrypt key

Decrypt Files

The appearance of Wanna Decrypt0r 4.0 ransomware pop-up (GIF):

Wanna Decrypt0r 4.0 ransomware pop-up gif

Screenshot of files encrypted by Wanna Decrypt0r 4.0 (".WNCRY" extension):

Files encrypted by Wanna Decrypt0r 4.0 ransomware (.WNCRY extension)

Screenshot of Wanna Decrypt0r 4.0 ransomware's process on Windows Task Manager ("Windows Defender"; process name may vary):

Wanna Decrypt0r 4.0 ransomware process on task manager (Windows Defender; process name may vary)

Screenshot of the pop-up window displayed after the malicious executable of Wanna Decrypt0r 4.0 ransomware is opened:

Wanna Decrypt0r 4.0 ransomware pop-up displayed once the malicious executable is opened

Wanna Decrypt0r 4.0 ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Wanna Decrypt0r 4.0 virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Wanna Decrypt0r 4.0 ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Wanna Decrypt0r 4.0 ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Wanna Decrypt0r 4.0 are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Wanna Decrypt0r 4.0, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Wanna Decrypt0r 4.0 ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites, and Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Wanna Decrypt0r 4.0 ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Wanna Decrypt0r 4.0 virus QR code
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