Tuis Virus – Details
Tuis is a harmful software working as typical ransomware. Michael Gillespie, the well-known malware researcher, very first discovered this new name in the DJVU ransomware family.
Tuis was created for the sole purpose to encrypt all popular file types. Rationally, as quickly as the encryption is effectively accomplished, the users are not able to get access to them. Tuis virus includes its own “.tuis” to all the encrypted files. For example, the file “price_list.xls”, as soon as crypted by Tuis, will be entitled as “price_list.xls.tuis”. As soon as the encryption is achieved, Tuis puts its own unique text file (_readme.txt) into all the folders that keep the encrypted files.
The alert specified by document asking for the random os really comparable to the notices provided by other ransomware threats coming from the DJVU family. The caution basically shows that the information has been encrypted and the only option to get access to it is to use a special standalone key. Regretfully, this declaration is definitely real.
The approach to secure the files utilized by Tuis is not totally researched. Nevertheless, there is no doubt that each computer owner might be issued a special decryption key, which is absolutely special. It is extremely difficult to recover the information without the suitable key in location.
“Don’t worry, you can return all your files!”, from text file message:
One more peculiarity of the Tuis ransomware is that the users are not able to get access to the key. The decrypting key is hosted on a special server under the complete control by the crooks who have introduced the Tuis infection into the internet. In order to acquire the key and restore the essential information, the users are informed to connect with the scams via e-mail or by telegram and to pay the ransom in the quantity of $980.
The message likewise says that the people must call the Tuis authors within 72 hours upon the moment of the data encryption. The alert suggests that by doing so individuals will get a 50% discount, for that reason, the ransom amount drops down to $490.
Tuis encrypted your files, nevertheless, it might not be the only threat on your PC. Plus, the ransomware might be hidden deep in the system. To discover and delete the danger entirely, we recommend you to refer to the aid of GridinSoft Anti-Malware .
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No matter what the quantity of the ransom is, we strongly encourage that you do not pay the ransom. There is no assurance that these online crooks will keep their promises, so they might not care at all what the victims feel about the file encryption, even when the quantity of the ransom is received into their accounts. Hence, paying ransom frequently does not lead to an effective healing. So, the users might just lose their money for nothing.
Likewise, we advise you not to contact the scams as they advise. Do not transfer cash into their wallets. There are no applications that might split the Tuis virus or bring back the information for free. For that reason, the only proper decision is to restore the information from possible backups (if readily available).
Virus Summary
| Name | Tuis Ransomware |
| File Extension | tuis |
| Type | Ransomware |
| Family | DJVU |
| Short Description | The 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. |
| Symptoms | File 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 .tuis extension to all the files modified by it. |
| Distribution Method | Adware bundles and software cracks |
| Similar Infections | Lokas, Besub, Nusar |
| Tuis Removal Tool | GridinSoft Anti-Malware |
| Tuis Decryption Tool | Emsisoft Djvu Decryptor |
Do not forget that the Internet is now loaded with infections comparable to the Tuis ransomware. For example, this particular threat is essentially identical to Brusaf and other ransomware-type infections. These harmful energies have been established in order to encrypt the important information and express the need for the users to pay the ransom. All these infections utilize the identical algorithm to produce the specific key for effective files decryption.
Unless the Tuis ransomware is still under the development process or has got some hidden bugs, it is not possible to bring back the information by hand. Thus, the only working solution to avoid the loss of your crucial information is to regularly keep updated backups of all your important files.
Another essential piece of recommendations is to keep the backups on special storage not linked to your main computer. For example, 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 system drive is really dangerous, because the backup might likewise be encrypted by the Tuis .
Leaks for the Tuis ransomware attack.
Tuis utilizes lots of courses to penetrate the vulnerable computer systems. It is not specific what specific method was used in your case, nevertheless, the invasion may take place via the following channels:
- bundling with third-party programs, generally free software;
- spam e-mails from the unknown senders;
- sites offering complimentary hosting;
- P2P (peer-to-peer) torrent software.
There are times when the Tuis virus might disguise itself as some genuine application, for example, through the deceptive alerts demanding setup of some software application upgrade. This is the most common trick utilized by the frauds to inject the Tuis infection files into the system. In this manner users partly participate in its setup, without plainly comprehending the danger.
In addition, the scams may send out unsolicited spam email with challenging signals encouraging individuals to open suspicious attachments or click on some download links, for example, those motivating individuals to open specific images, text files, tax files and other information.
No doubt, opening these files or clicking the harmful links might basically damage the system. Fake Media Player update alerts may lead to the Tuis ransomware infiltration. Likewise, downloading the broken software application may additionally include the ransomware installer. The last but not the least, setup of Tuis might happen through some Trojan horses that might be installed stealthily into the system and without the user’s direct authorization or perhaps authorization.
Preventing the Tuis ransomware injection.
Obviously, there is no outright assurance that your computer system will be constantly without any malware attacks, however, we would like to share some useful tips with you to make it much safer. Make certain to pay really very close attention while browsing the web and specifically while getting cost-free programs. Do not open any suspicious e-mail accessories, specifically if the sender is not understood to you.
Do not forget that specific freeware installer might also include some other additional apps in the package. These additional applications might be really harmful. It is of utmost significance to keep your anti-virus software and your operating system in basic to be always correctly updated.
It is rather logical that downloading cracked software is unlawful, however, furthermore, such unauthorized software application use might likewise bring major damage to your system. For this reason, do not download any broken programs. Plus, the truth that your current anti-virus did not protect the system from the Tuis ransomware is a good factor for you to reconsider your choices and switch to another program that can render the protecting functions on a far better level.
Below please find the quotation from the Tuis text file:
ATTENTION! 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: https://we.tl/t-2P5WrE5b9f 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: restorealldata@firemail.cc Reserve e-mail address to contact us: gorentos@bitmessage.ch Our Telegram account: @datarestore
Screenshot of files with “.tuis” extension added by the virus:”
Use GridinSoft Anti-Malware to remove Tuis ransomware from your computer
1.Download GridinSoft Anti-Malware.
You can download GridinSoft Anti-Malware by clicking the button below:
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.
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.
3. Press Install button for run GridinSoft Anti-Malware.
3.Once installed, GridinSoft Anti-Malware will automatically run.
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.
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.
Use Emsisoft Decryptor for restore tuis files
You can get Emsisoft Decryptor by clicking the button below:
- Run the decryptor as an administrator. The license terms will show up, which you have to agree to by clicking the “Yes” button.
- Once the license terms are accepted, the primary decryptor user interface opens.
- 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.
- 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.
- 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
- 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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