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Yyto ransomware virus. How to remove? (Uninstall guide)

removal by Lucia Danes - -   Also known as Yyto ransomware | Type: Ransomware

Yyto ransomware — a dangerous cryptovirus that has been active since July 2018

The picture illustrating Yyto ransom note
Yyto is a file-encrypting virus that makes files useless due to the appended unknown extension

Questions about Yyto ransomware virus

Yyto is a ransomware virus that encrypts files and demands ransom for the alleged decryption key. This virus encodes data with AES-256 cryptography[1] and marks it with .YYTO file extension[2]. This cryptovirus already has a few versions discovered and the last one appends the .davilarita@mail.com.yyy0 file extension to the encrypted data. This version is already the fifth one discovered in these two months of 2018. Yyy0 ransomware encrypts files using the same AES encryption method and delivers a ransom note in a file named as help.txt that contains an offer to test decryption of several encrypted files. You shouldn't do that. Unfortunately, any contact between you and these hackers cannot lead to positive results.

Name Yyto
Type Ransomware
Danger level High. Makes files useless, demands ransom. Can lead to permanent money and data loss.
Encryption AES-256
Extension .codyprince92@mail.com.ovgm;  .YYTO; .b007; .adapaterson@mail.com.mkmk; .davilarita@mail.com.yyy0
Ransom file help_to_decrypt.txt; read_to_txt_file.yyt ; help.txt; encrypt.txt; Readme.txt
Contact email
    • codyprince92@mail.com;
    • cutterswish@torbox3uiot6wchz.onion;
    • isabell@torbox3uiot6wchz.onion; 
    • albertkerr94@mail.com; 
    • colecyrus@mail.com;
    • davilarita@gmail.com
Distribution Insecure spam email attachments
Removal Best tool for removing ransomware is Reimage

Since the release of the original version of the Yyto, developers have presented a bunch of new versions of the virus. The main difference is the appended file extension, used contact email address and titles of the ransom notes. Currently, it is known that this ransomware family provides identical data recovery instructions. The ransom note is supposed to be one of these files:

  • help_to_decrypt.txt;
  • read_to_txt_file.yyt;
  • help.txt;
  • encrypt.txt;
  • Readme.txt.

All of these documents begin with the following text:

Hello. Your files have been encrypted. 

For help, write to this e-mail: codyprince92@mail.com
Attach to the letter 1-2 files (no more than 3 MB) and your personal key. 
If within 24 hours you have not received a response, you need to follow the following instructions:

Unlike other crypto-malware, Yyto virus refers to an .onion link which leads to TorBox. According to the information provided on its homepage, it is a secret email domain designed for communication and separated from the public net. It should ensure the anonymous connection between a perpetrator and a victim.

Yyto virus attack
Yyto virus has several versions that append different file extensions.

It doesn’t matter which version of ransomware attacks the computer; the instructions remain the same. Victims should contact the cyber criminals via cutterswish@torbox3uiot6wchz.onion, isabell@torbox3uiot6wchz.onion, albertkerr94@mail.com or colecyrus@mail.com email address.

Usually, perpetrators provide Tor or Bitcoin wallet address for collecting ransoms. In this case, the authors behave differently. Instead, they opt for Torbox. However, neither of the ransom notes provide the actual sum of money that victims have to pay in order to get back their files. However, contacting criminals and following their further instructions is not recommended.[3] It may lead to the money loss, so it’s better to proceed to Yyto removal.

Users are advised to remove Yyto virus using powerful and reputable malware removal program, such as Reimage or Plumbytes Anti-MalwareNorton Internet Security. However, if you cannot install or run security software, you should scroll down to the end of the article and learn how to disable the virus first.

Developers of Yyto ransomware constantly come up with new versions

.read_to_txt_file.juuj file extension virus. The first variant of the Yyto malware appeared at the beginning of July. The ransomware uses the same AES cryptography but appends a new file extension – .read_to_txt_file.juuj. It delivers a ransom note in the help.txt file and asks to contact via isabell@torbox3uiot6wchz.onion to get data recovery instructions.

.m5m5 file extension virus. The second version of the virus has been released in September. Since then crypto-malware adds .m5m5 file extension to corrupted audio, video, image and other targeted files. This time ransomware drops either help.txt or encrypt.txt files with recovery instructions. There’s nothing new in hackers' demands. Victims have to contact them via albertkerr94@mail.com to learn about recovery possibilities.

Yyto ransom note
Yyto displays a ransom note as soon as all targeted files are encrypted.

Colecyrus ransomware virus. The latest version of the Yyto malware appends .b007 file extensions to prevent users from opening their files. The virus uses an unbreakable AES-CBC cryptography. Even though criminals offer data recovery possibility in Readme.txt file, victims are not advised contacting crooks via colecyrus@mail.com address and paying demanded sum of Bitcoins.

.codyprince92@mail.com.ovgm file extension virus. In June 2018, a new version of Yyto ransomware was discovered and this time new “.codyprince92@mail.com.ovgm” extension is added for files after encryption. Ransom message delivered in “Readme.txt” file and contact email codyprince92@mail.com is now also on the list. Ransomware viruses are dangerous enough so you should not contact these people. But it is more harmful because Yyto is evolving and new version after version come to the public. These new ransomware variants are even more dangerous than the previous. 

yyy0 ransomware is the newest variant of Yyto that emerged in September 2018. It has file extension .davilarita@mail.com.yyy0 which is added to encrypted files after the process is done to mark encoded files from other ones. In every folder with encrypted data virus places ransom file help.txt that contains instructions on creating the cryptocurrency wallet, so you can pay the ransom. We always advise you not to do so. Ransomware file is detected by 51/69 AVs[4], so you can remove this threat using your antivirus or anti-malware tools like Reimage and Malwarebytes.  

Ransomware comes with spam email attachments

Despite dozens of written articles about Yyto ransomware and their distribution ways, spam emails remain the most popular method of transmission. Ransomware executable is wrapped into .zip folder and presented as supposed invoice or package delivery information. Security experts from Finland[5] warn to be careful with received emails and stay away from letters that are sent from the unknown sender and includes attachments.[6] 

Speaking of which, the virus also disguises its executable in 2.exe or RS01bz.exe file. Note that the trojan which may be identified as TR/Crypmodadv.tuglz, Win32.Trojan.WisdomEyes.16070401.9500.9945, or Spyware (004c76c01) delivers Yyto hijack payload as well. Thus, mere vigilance is not sufficient in securing your computer and personal data from virtual threats. Install an anti-virus and anti-spyware tools to fortify the protection.

Removal of the Yyto ransomware virus is crucial for the PC

Data recovery always seems the most important task after the ransomware attack. However, it's not quite true. It's crucial to perform Yyto removal as soon as launches the attack. Malware might cause various system changes, alter Windows registry or install malicious programs. Therefore, you won't be able to use your computer normally and safely again.

In order to remove Yyto virus correctly, you have to obtain a reputable malware removal program, such as Reimage, Malwarebytes or Plumbytes Anti-MalwareNorton Internet Security. If your computer security tool is forcefully shutdown, you may benefit from below instructions. After restoring the access, you will be able to finish Yyto removal.

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To remove Yyto virus, follow these steps:

Remove Yyto using Safe Mode with Networking

It is very unlikely that the malware intervenes with the processes of a computer security application. If it does actually, proceed to the following instructions and restart the computer in Safe Mode.

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove Yyto

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete Yyto removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove Yyto using System Restore

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Yyto. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that Yyto removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Yyto from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If your files are encrypted by Yyto, you can use several methods to restore them:

The effectiveness of Data Recovery Pro

You may try using this tool for data recovery in case you have run out of options.

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by Yyto ransomware;
  • Restore them.

What is Windows Previous Versions?

This integrated function allows recovering the file by using its last autosaved copy. Note that the method only works when System Restore is enabled.

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

Opting for ShadowExplorer

The program employs shadow volume copies to restore the files. Since there is no information that the malware deletes them, you may benefit from this mode.

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

Yyto decryptor is not available yet

About the author

Lucia Danes
Lucia Danes - Virus researcher

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References

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