Djvu VirusRansomwareRemoval Guide

Tyos Virus Removal Guide (+Decrypt .tyos files)

Tyos – General Info

Tyos is a malicious software application working as common ransomware. Michael Gillespie, the well-known malware researcher, first found this new name in the DJVU ransomware family.

Tyos was developed for the sole purpose to encrypt all popular file types. Realistically, as quickly as the file encryption is successfully accomplished, the users are unable to get access to them. Tyos ransomware includes its own “.tyos” to all the encrypted data. For instance, the file “price_list.xls”, as soon as crypted by Tyos, will be titled as “price_list.xls.tyos”. When the file encryption is achieved, Tyos puts its own special text document (_readme.txt) into all the folders that store the encrypted files.

The alert mentioned by _readme.txt asking for the random os very similar to the notices provided by other ransomware threats coming from the DJVU family. The warning generally indicates that the files have been encrypted and the only solution to get access to it is to use an unique standalone key. Regretfully, this statement is absolutely true.

The method to encrypt the files used by Tyos is not totally researched. Nevertheless, there is no doubt that each computer system owner might be issued a special decryption key, which is absolutely distinct. It is exceptionally hard to recuperate the data without the proper type in place.

“Don’t worry, you can return all your files!”, from text file message:

message from Tyos virus

One more peculiarity of the Tyos infection is that the users are unable to get access to the key. The decrypting key is hosted on an unique server under the complete control by the crooks who have introduced the Tyos virus into the web. In order to acquire the key and bring back the important data, the users are told to connect with the scams through email or by telegram and to pay the ransom in the quantity of $980.

The message likewise says that individuals should call the Tyos authors within 72 hours upon the minute of the data file encryption. The alert indicates that by doing so the people will get a 50% discount rate, for that reason, the ransom amount drops down to $490.

No matter what the amount of the ransom is, we highly advise that you do not pay the ransom. There is no assurance that these online criminals will keep their guarantees, so they might not care at all what the victims feel about the file encryption, even when the quantity of the ransom is gotten into their accounts. Hence, paying ransom frequently does not result in an effective healing. So, the users might merely lose their money for absolutely nothing.

Likewise, we prompt you not to contact the scams as they instruct. Do not transfer money into their wallets. There are no applications that could break the Tyos ransomware or restore the information for free. Therefore, the only appropriate decision is to bring back the information from possible backups (if offered).

Virus Summary

NameTyos Ransomware
File Extensiontyos
Short DescriptionThe ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
SymptomsFile encryption by the ransomware is performed by means of the AES-256 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .tyos extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsLokas, Besub, Nusar
Tyos Removal Tool   GridinSoft Anti-Malware
Tyos Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Internet is now loaded with infections comparable to the Tyos ransomware. For example, this specific threat is basically identical to Brusaf and other ransomware-type infections. These destructive energies have been established in order to secure the important data and reveal the demand for the users to pay the ransom. All these infections use the similar algorithm to generate the specific key for effective data decryption.

Unless the Tyos ransomware is still under the development procedure or has actually got some concealed bugs, it is not possible to restore the data manually. Thus, the only working solution to prevent the loss of your essential information is to routinely keep up-to-date backups of all your important documents.

Another essential piece of advice is to save the backups on special storage not connected to your main computer. For instance, you might store it on the USB Flash Drive, or some external drive, or by using the cloud data storage services. Keeping the backups on your regular drive is really risky, considering that the backup may likewise be secured by the Tyos infection.

Leakages for the Tyos ransomware attack.

Tyos uses numerous paths to penetrate the susceptible computer systems. It is not certain what specific approach was used in your case, nevertheless, the invasion might happen through the following channels:

  • bundling with third-party programs, generally free software;
  • spam e-mails from the unidentified senders;
  • sites providing complimentary hosting;
  • P2P (peer-to-peer) torrent software.

There are times when the Tyos virus may camouflage itself as some genuine application, for example, through the misleading notifies demanding installation of some software application upgrade. This is the most common trick utilized by the scams to inject the Tyos ransomware files into the system. This way users partially participate in its setup, without plainly comprehending the danger.

In addition, the scams may send out unsolicited spam email with challenging notifies encouraging individuals to open suspicious attachments or click some download links, for instance, those motivating the people to open certain photos, text files, tax files and other info.

No doubt, opening these files or clicking on the malicious links might basically damage the system. Fake Media Player update alerts may cause the Tyos ransomware seepage. Similarly, downloading the broken software application might furthermore include the ransomware installer. The last but not the least, installation of Tyos may happen through some Trojan horses that may be set up stealthily into the system and without the user’s direct authorization or even authorization.

Avoiding the Tyos ransom virus attack.

Naturally, there is no absolute guarantee that your computer system will be always without any malware attacks, however, we wish to share some useful tips with you to make it much safer. Make sure to pay extremely attention while browsing the web and particularly while downloading cost-free programs. Do not open any dubious e-mail accessories, specifically if the sender is not understood to you.

Do not forget that particular freeware installer might also include some other additional apps in the bundle. These additional applications might be extremely harmful. It is of utmost significance to keep your anti-virus software application and your os in basic to be constantly appropriately updated.

It is quite rational that downloading cracked apps is unlawful, nevertheless, additionally, such unapproved apps use may also bring severe damage to your PC. Thus, do not download any cracked programs. Plus, the fact that your existing anti-virus did not protect the system from the Tyos ransomware is an excellent reason for you to reevaluate your options and change to another program that can render the protecting functions on a better level.

Below please find the quotation from the Tyos text file:


 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:

Screenshot of files with “.tyos” extension added by the ransomware:”

Tyos Ransomware - encrypt files with .tyos extension

Use GridinSoft Anti-Malware to remove Tyos ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can get GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

Use Emsisoft Decryptor for restore tyos files

You can get Emsisoft Decryptor by clicking the button below:

  Emsisoft Decryptor

  1. Run the decryptor as an administrator. The license terms will show up, which you have to agree to by clicking the “Yes” button.
  2. Once the license terms are accepted, the primary decryptor user interface opens.
  3. By default, the decryptor will pre-populate the locations to decrypt with the currently connected drives and network drives. Additional locations can be added using the Add” button.
  4. Decryptors typically offer various options depending on the particular malware family. The available options are located in the Options tab and can be enabled or disabled there. You can find a detailed list of the available Options below.
  5. After you have added all the locations you want to decrypt to the list, click the “Decrypt” button to start the decryption process. The screen will switch to a status view, informing you about the current process and decryption status of your files
  6. The decryptor will inform you once the decryption process is finished. If you require the report for your personal records, you can save it by clicking the “Save log” button. You can also copy it straight to your clipboard to paste it into emails or forum posts if you are asked to.
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Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

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One Comment

  1. i just used emsisoft for decrypting my data after i got that tyos ransomware and it said “id is online and its impossible to decrypt your data” is there anything else i can do , just to mention i used the stopdjvo tool maybe its not for tyos ,should i wait for their update on it or its not worth it.

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