Home > Ransomware > Remove Ninja.Gaiver@aol.com Ransomware and Restore .777 Encrypted Files

Remove Ninja.Gaiver@aol.com Ransomware and Restore .777 Encrypted Files

2016-051919-1952-99.2It appears that Ninja ransomware may be back and this time it uses ninja.gaiver@aol.com, kaligula.caesar@aol.com and seven_legion@india.com cyber-criminal addresses. The ransomware does not even use a ransom note, instead leaving the Ninja.Gaiver e-mail address on the files it encrypts. The encrypted files are with a .777 file extension, and the encryption algorithm is believed by researchers to be a XOR mask. Users who have been affected by this nasty ransomware virus are warned to immediately remove it and try restoring their files using alternative methods such as the ones at the end of this article.

UPDATE! A derypter for .777 has been developed by researchers at EmsiSoft. You may download and use it by clicking the following web link:
Emsisoft Decrypter for 777 Files.

Threat Summary

Name Ninja.Gaiver
Type Ransomware
Short Description The ransomware encrypts files with a XOR mask and asks a ransom for decryption.
Symptoms Files are encrypted with the .777 file extension added to them along with the email address and become inaccessible. A ransom note with instructions for paying the ransom shows is added as a file.
Distribution Method Spam Emails, Email Attachments, File Sharing Networks.
Detection Tool See If Your System Has Been Affected by malware


Malware Removal Tool

User Experience Join our forum to Discuss Ninja.Gaiver@aol.com Ransomware.
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.

Ninja.Gaiver@aol.com Ransomware – Distribution

Similar to the older variant of Ninja Ransomware, this variant may slip past the antivirus by using an obfuscated malicious executable. Such may be spread via several methods:

Via an infected flash drive – most users may become victims of a malicious flash drive inserted on their computer that may take advantage of the Windows AutoPlay function.

By downloading content from unknown websites – such sites, for example, unknown torrent websites may contain ripped software that may have a key generator(keygen) or a crack(exe) file that is usually used to crack the application and let users use it for free. However these are also a perfect bait for the user and malware writers know that.

By becoming a victim to a drive-by download – such downloads may usually be caused by visiting malicious URL web links that may be displayed to the user as a consequence of having a PUP (Potentially Unwanted Application or Adware) such as DNS Unlocker, for example, installed on their computer.

Ninja.Gaiver@aol.com Ransomware – More About It

Once it has been executed on your computer, Ninja.Gaiver Ransomware may download a malicious executable on your computer. It could be located in different places, but the usually targeted locations are:

commonly used file names and folders

The malicious file may be of several different file types:

→ .dll; .tmp; .bat; .exe; .vbs; .reg;

It may contain different names, for example:

  • Adobe-Updater.exe
  • Setup.exe
  • {298h128-d3b0bfn30}.exe
  • Aaaa.tmp
  • Pac-man.dll

Besides that, Ninja.Gaiver Ransomware may create a registry entry for the malicious executable, allowing it to run and encrypt files every time you start your Windows. The targeted key in the Windows Registry Editor is the following:

→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

Furthermore, the ransomware may execute the following command to delete your shadow volume copies:

→ vssadmin delete shadows /for={Your volume} /all /shadow={ID}] /quiet

Then, the Ninja.Gaiver Ransomware may begin to scan for and encrypt files with the following file extensions, for example:

→ .3ds .4db .4dd .7z .7zip .accdb .accdt .aep .aes .ai .alk .arj .axx .bak .bpw .cdr .cer .crp .crt .csv .db .dbf .dbx .der .doc .docm .docx .dot .dotm .dotx .drc .dwfx .dwg .dwk .dxf .eml .enz .fdb .flk .flka .flkb .flkw .flwa .gdb .gho .gpg .gxk .hid .hid2 .idx .ifx .iso .k2p .kdb .kdbx .key .ksd .max .mdb .mdf .mpd .mpp .myo .nba .nbf .nsf .nv2 .odb .odp .ods .odt .ofx .ost .p12 .pdb .pdf .pfx .pgp .ppj .pps .ppsx .ppt .pptx .prproj .psd .pst .psw .qba .qbb .qbo .qbw .qfx .qif .rar .raw .rfp .rpt .rsa .rtf .saj .sdc .sdf .sef .sko .sql .sqlite .sxc .tar .tax .tbl .tc .tib .txt .wdb .xbrl .xls .xlsm .xlsx .xml .zip Source: Symantec

After doing so, the Ninja.Gaiver ransomware adds the .777 file extension to the encrypted files along with its aol e-mail address. An encrypted file is reported by infected users to look like the following:

→ New Text Document.txt.{date-and-time-of-encryption}_$ninja.gaiver@aol.com(or one of the other e-mails)$.777

Ninja.Gaiver Ransomware – Conclusion and Removal

The bottom line for the Ninja.Gaiver ransomware is that it was created for one purpose – to contact the ninja.gaiver@aol.com e-mail address so that you can be provided with instructions, negotiate the price to decode your files and even ask the cyber-crooks to decrypt a file for free. We strongly advise against paying any ransom money and removing this threat, because first you fund the cyber-criminals to develop this malware and second you may not get your files 100% back.

To remove this ransomware, be advised that you are welcome to try our removal instructions since they are methodologically arranged to help your situation and delete it. In case you want to have maximum effectiveness while removing and remain protected in the future as well, you should download an advanced anti-malware software which will detect all associated files and registry entries and remove them.

To decrypt your files, fortunately there has been a decryptor released by Emsisoft researchers. You may find it if you click on the link above the table of information at the start of this article. Also, you may also find useful the alternative methods that “go around” direct decryption. All of the restoration methods can be found in the step “Restore files encrypted by Ninja.Gaiver” below just in case the decryptor does not work for you.

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

About the Ninja.Gaiver Research

The content we publish on SensorsTechForum.com, this Ninja.Gaiver how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.

How did we conduct the research on this ransomware?

Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.

Furthermore, the research behind the Ninja.Gaiver ransomware threat is backed with VirusTotal and the NoMoreRansom project.

To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.


1. How to Recognize Spam Emails with Ransomware
2. How Does Ransomware Encryption Work?
3. How to Decrypt Ransomware Files
4. Ransomware Getting Greedier and Bigger, Attacks Increase by 40%
5. 1 in 5 Americans Victim of Ransomware

Windows Mac OS X

How to Remove Ninja.Gaiver from Windows.

Step 1: Boot Your PC In Safe Mode to isolate and remove Ninja.Gaiver


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 Ninja.Gaiver 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 Ninja.Gaiver 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 Ninja.Gaiver 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 Ninja.Gaiver 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.

Video Guide for Automatic and Fast Removal

Step 5 (Optional): Try to Restore Files Encrypted by Ninja.Gaiver.

Ransomware infections and Ninja.Gaiver 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 recommended Data Recovery software by clicking on the link underneath:

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

Step 6: How to Restore Files Encrypted by Ransomware (Video Guide)

Windows Mac OS X

Get rid of Ninja.Gaiver from Mac OS X.

Step 1: Uninstall Ninja.Gaiver 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 Ninja.Gaiver:

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 Ninja.Gaiver. 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 Ninja.Gaiver. 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 Ninja.Gaiver 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 Ninja.Gaiver. 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 Ninja.Gaiver:


SpyHunter for Mac

Step 3 (Optional): Try to Restore Files Encrypted by Ninja.Gaiver.

Ransomware infections and Ninja.Gaiver 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 recommended 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.

Ninja.Gaiver FAQ

What is Ninja.Gaiver ransomware and how does it work?

Ninja.Gaiver 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 Ninja.Gaiver ransomware infect my computer?

Via several ways.Ninja.Gaiver 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 Ninja.Gaiver 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 .Ninja.Gaiver files?

You can't. At this point the .Ninja.Gaiver 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 .Ninja.Gaiver files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by Ninja.Gaiver 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 ".Ninja.Gaiver" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Ninja.Gaiver 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 Ninja.Gaiver 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 Ninja.Gaiver ransomware and then remove it without causing any additional harm to your important .Ninja.Gaiver files.

Also, keep in mind that viruses like Ninja.Gaiver 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.

  1. Arvind Chouhan

    Any update on how to decrypt those files?

    1. Vencislav Krustev

      Hello, Arvind

      As written in the “Update” window in the first paragraph, there has been a decryptor released for victims of the .777 ransomware. You can download it from the EmsiSoft URL below(It’s free):


      1. Arvind Chouhan

        Thanks for your reply. I tried that but it seems that we are unable to restore our data. BTW thanks for your blog and reply. :)

        1. Vencislav Krustev

          Don’t hesitate to open a topic on our forum if you have any tech-related questions. We will reply as soon as able : )

          1. Nick

            Hi Venci,

            Ima li reshene za dekodiarane na Ninja.Gaiver@aol.com files?


          2. Vencislav Krustev (Post author)

            Привет, Ник

            За момента, на Емсисофт декриптора би трябвало да работи. Безплатен е. Можеш да си го изтеглиш от този уеб линк:

        2. Dennis

          The “encryption” is a simple xor mask. You should be able to restore your files rather easily.

          1. Colin

            our data has been encrypted with the extension xtbl (using the email address id-64A61CC1.batman_good@aol.com.xtbl.id-87573DFGHVkjF.okean-1955@india.com.xtbl I have a .777 decrypter which doesn’t work but is this the same variant do you know?? thanks in advance!

          2. Dennis

            I’ve seen two variants of the 777 ransomware. One encrypts with a simple 0x37 XOR mask. This is the version that emisoft’s decryptor will undo. The other is slightly more sophisticated and uses a 0x2021222324252627 XOR mask. Other variants may use different masks. If you have an unencrypted version of a file, you can compare it to the encrypted one to find the actual mask used. Then, it’s a simple matter (for a programmer) to restore all your originals. Even if you don’t have any unencrpted versions of files to compare against, examining either an encrypted text file, or a file that might have a lot of zeros (in the original) should readily reveal the mask used.
            Please don’t hesitate with any further questions…

          3. Colin

            Thanks so much for your reply. I do have an unencrypted copy of one of the files which I found yesterday. Who would you suggest I look to contact now that I have both before and after decrypted files? I presume this may possibly help to decrypt the files

          4. Dennis

            If you can XOR the two files together, that will give you the mask, which you can use to decrypt the files. If you are familiar with pretty much any programming language, or know someone who is, this should be fairly simple.

          5. Francesco

            Hi Dennis, i have just taken Ninja Gaiver ransom, have you got one mail where i can send you a file to see if you can help me? I have a copy of a clean file and a copy of a encripted. I will pay you the service or can make some try if you explain me better how. Hope in your help.

          6. Dennis

            Francesco, you can e-mail me your files at d_wilk@cox.net. I can take a look at them, but can’t promise anything.

  2. SensorsTechForum

    Hi Bashir,

    Unfortunately, this is a new ransomware from the XTBL family for which there is no way to decrypt files. Read more about it here: sensorstechforum.com/remove-okean-1955-ransomware-restore-xtbl-encrypted-files

    Kaspersky and Emsisoft decryptors didn’t work with your files. However, you can still try and recover your data via software recovery tools. Let us know if you have more questions!


    1. Dennis

      Before accepting this answer, it may be worth your while to do a little more research. Note that this page also called the 777 encryption “one of the strongest used” when in fact it is trivial.

      1. SensorsTechForum

        Hello Dennis,

        Actually, Bashir sent us a couple of files and that’s how we knew he’s been infected with a new variant of XTBL ransomware. Because we’re always willing to help victims of ransomware, we tried the available EmsiSoft decrypter and it didn’t work. If you have any useful information, we’d be more than happy to continue this conversation.

        Stay tuned,


        1. Dennis

          Yes, but some versions of the 777 were also not decrypted by either the Kaspersky or Emsisoft decrypters. None the less, the decryption was simple: an 0x2021222324252627 XOR mask. It should be easy to detect if an XOR mask is being used, and, if so, what that mask is. First, check if your encrypted and unencrypted files are the same size. If so, XOR the files together and see if the XOR mask appears. Then, apply the XOR mask and voila, your files are decrypted.

  3. Je Be

    I paid 3 bitcoins (about $1800) to the hackers, got the odd reply but DID NOT get the code to decrypt. Total waste of money on a big time a-hole, spend your time and cash elsewhere, not all hackers come through when you pay up. Mine was batman_good@aol.com

    1. Milena Dimitrova

      Hi Je Be,

      Thank you for the warning! We suppose that your data was quite valuable and that’s why you decided to proceed with the payment.


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