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Wanna Decryptor (WannaCry) Ransomware (Restore Files)

Article created to demonstrate how to remove Wanna Decryptor (WannaCry) ransomware and restore files encrypted via AES and RSA encryption algorithm.

“Oops, your important files are encrypted” is what the victims of the Wanna Decryptor WannaCry virus see after their computers are infected by this virus. Once this has happened, the ransomware infection begins to append encryption algorithms and make the documents on the affected computers no longer readable. After this has happened, !Please Read Me!.txt file is dropped onto the computer of the user which aims to get victims to download a decryptor from a dropbox account. Then, the decryptor demands 300$ in BTC payoff to get the data back. In case you have become a victim of the Wanna Decryptor threat, we recommend reading this article carefully.

Update June 2017! New ransomware outbreak inspired by the WannaCry ransomware, also using “Oops your important files have been encrypted” has been detected. The virus is a modified version of Petya ransomware. More information can be found on this web link.

Threat Summary


Wanna Decryptor

Type Ransomware
Short Description The malware encrypts users files using AES and RSA encryption ciphers, making direct decryption possible only via a unique decryption key available to the cyber-criminals.
Symptoms The user may witness ransom notes and “instructions”, called !Please Read Me!.txt linking to contacting the cyber-criminals. Changes wallpaper with message asking to download a decryptor from Dropbox. The decryptor demands 300$ in BTC to work.
Distribution Method Via an Exploit kit, Dll file attack, malicious JavaScript or a drive-by download of the malware itself in an obfuscated manner.
Detection Tool See If Your System Has Been Affected by malware


Malware Removal Tool

User Experience Join our forum to Discuss Wanna Decryptor.
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.

Wanna Decryptor Ransomware – How Does It Infect

For the infection with this virus to be successful, the cyber-criminals behind the Wanna Decryptor threat may use a combination of different tools and kits:

  • Spamming software for e-mail.
  • A pre-set list of e-mail addresses to spam, usually bought on the black market.
  • Software responsible for different obfuscation of files so that detection by security software is avoided.
  • Different infection malware (Downloaders, droppers, extractors, etc.)
  • Malicious command and control servers and distribution hosts.

The most often-used method by which criminals like the ones behind Wanna Decryptor ransomware use is via e-mail spam. Such spam messages usually resemble different important notices, to trick users into either opening malicious e-mail attachments or clicking on links which redirect to malicious hosts. One example of such deceptive e-mail can be seen below:

After the Wanna Decryptor threat has already caused an infection by convincing the user to open the malicious attachment, the virus begins to drop it’s malicious files on the infected computer. The files which were detected so far by researchers are the following:

  • !WannaDecryptor!.exe
  • !WannaDecryptor!.exe.lnk
  • !WannaCryptor!.bmp
  • !Please Read Me!.txt

Besides these files, there may be fake process files and other support modules with random names spread out in various Windows folders such as the following:

  • %AppData%
  • %Temp%
  • %Roaming%
  • %Local%
  • %SystemDrive%

Wanna Decryptor Ransomware – What Does It Do?
The activity of Wanna Decryptor is relatively the same as most ransomware viruses out there. The virus executes an administrative command which deletes all the backed up files (shadow copies) on the infected Windows machines:

→ vssadmin.exe Delete shadows /All /Quiet

Wanna Decryptor virus also performs the deletion In /quiet mode, without the user noticing anything is happening.

Then, the Wanna Decryptor ransomware may perform modifications on the following Windows Registry sub-keys:

→ HKEY_CURRENT_USER\Control Panel\Desktop\
HKEY_USERS\.DEFAULT\Control Panel\Desktop\

In the Run and RunOnce sub-keys, values may be added to make the malicious executable which is responsible for encrypting files to run when Windows boots. The Desktop keys, may have a modified sub-key for the wallpaper, which is later changed to the !WannaCryptor!.bmp image:

It also has the following message:

Ooops, your important files are encrypted.
If you see this text, but don’t see the “Wanna Decryptor” window, then your antivirus removed the decrypt software or you deleted it from your computer.
If you need your files, you have to recover “Wanna Decryptor” from the antivirus quarantine, or download from the address below:
Run “Wanna Decryptor” to decrypt your files!

The web link, leading to drop box may download a decryptor which looks like the following:

The decryption software demands 300$ in BitCoin to be paid to decode the files.

Wanna Decryptor Virus – The Encryption Process

For the encryption process performed by Wanna Decryptor, two powerful encryption algorithms may be used. One of them is known as the Advanced Encryption Standard and is a very often met decryptor in most ransomware viruses. The cipher is also used by some US government agencies to encrypt secret documents. It’s usage in this virus is primarily focused on encrypting files and generating symmetric key (FEK) which makes the file non readable.

Then, another encryption algorithm, known as Rivest-Shamir-Adleman or RSA is used to generate a Public key corresponding to the symmetric key and adds the key in the file’s data. Since Wanna Decryptor ransomware may use unique keys for set of files or for every file, discovering a decryption method by reverse engineering it can only be successful if there is a mistake while coding the encryption procedure, which is not likely.

For more information on how this encryption process works, please visit the following related article:

The files, targeted by Wanna Decryptor ransomware are documents, videos, pictures and other often used file types, for example, the following:


After the process of encryption is complete, the virus may correspond with the cyber-criminals to send the decryption keys to them, so that they can update their decryptor in the dropbox site. Another scenario is if they have a master decryption key embedded within the decryptor. Whatever the case may be with Wanna Decryptor, experts recommend to remove this virus instead of paying the ransom.

Remove Wanna Decryptor Ransomware and Restore Encrypted Files

For the removal of this virus, advices are to first back up the encrypted files and then follow the removal instructions below. They are specifically created to help delete the malicious files and objects created by this ransomware on your computer. In case manual removal is a challenge for you, recommendations are to focus on automatically removing everything related to Wanna Decryptor ransomware. Experts advise that the best way of doing the removal is by downloading an advanced anti-malware tool which will not only delete all files but will also protect your computer against future infections.

If you want to try and restore the files encrypted by Wanna Decryptor, we have suggested some methods in step “2. Restore files encrypted by Wanna Decryptor” below. They are not 100% guarantee you will get all the files back, but you may recover at least some of the data using these methods.

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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Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.


with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy

Windows Mac OS X

How to Remove Wanna Decryptor from Windows.

Step 1: Boot Your PC In Safe Mode to isolate and remove Wanna Decryptor


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 Wanna Decryptor 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 Wanna Decryptor 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 Wanna Decryptor 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 Wanna Decryptor 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.

Step 5 (Optional): Try to Restore Files Encrypted by Wanna Decryptor.

Ransomware infections and Wanna Decryptor aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

Windows Mac OS X

Get rid of Wanna Decryptor from Mac OS X.

Step 1: Uninstall Wanna Decryptor 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 Wanna Decryptor:

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 Wanna Decryptor. 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 Wanna Decryptor. 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 Wanna Decryptor 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 Wanna Decryptor. 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.

Click the button below below to download SpyHunter for Mac and scan for Wanna Decryptor:


SpyHunter for Mac

Step 3 (Optional): Try to Restore Files Encrypted by Wanna Decryptor.

Ransomware infections and Wanna Decryptor aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

Wanna Decryptor FAQ

What is Wanna Decryptor ransomware and how does it work?

Wanna Decryptor is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does Wanna Decryptor ransomware infect my computer?

Via several ways.Wanna Decryptor Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of Wanna Decryptor is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open .Wanna Decryptor files?

You can't. At this point the .Wanna Decryptor files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your .Wanna Decryptor files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by Wanna Decryptor ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore ".Wanna Decryptor" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Wanna Decryptor files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of Wanna Decryptor ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate Wanna Decryptor ransomware and then remove it without causing any additional harm to your important .Wanna Decryptor files.

Also, keep in mind that viruses like Wanna Decryptor ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

  • Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
  • Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
  • Also, check if some of the files that were encrypted it can be re-downloaded from the web.
  • Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
  • You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.

How to Report Ransomware to Authorities?

In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer. Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:

Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:

Reports may be responded to in different timeframes, depending on your local authorities.

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