how to remove/decrypt .tisc virus

The tisc virus is a STOP/DJVU family of ransomware-type infections. This virus encrypts your files (video, photos, documents) that can be tracked by a specific “.tisc” extension. It uses a strong encryption method which makes it impossible to calculate the key in any way.

 

In this blog post we will discuss how to remove tisc from your computer and decrypt tisc encrypted data for free!
How To Remove Tisc Virus?In addition to encode a victim’s files, the Tisc infection has also started to install the Azorult Spyware on computer to steal account credentials, cryptocurrency wallets, desktop files, and more.4

Reasons why I would recommend GridinSoft

There is no better way to recognize, remove and prevent ransomware than to use an anti-malware software from GridinSoft.


Download Removal Tool.


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

Download GridinSoft Anti-Malware




Run the setup file.


When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.





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.





Press “Install” button.





Once installed, Anti-Malware will automatically run.





Wait for complete.


GridinSoft Anti-Malware will automatically start scanning your system for Tisc infections and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.





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.



Trojan Killer for special instances
In some certain instances, Tisc ransomware can block the running of setup files of different anti-malware programs. In this situation, you need to utilize the removable drive with a pre-installed antivirus tool.

There is a really little number of security tools that are able to be set up on the USB drives, and antiviruses that can do so in most cases require to obtain quite an expensive license. For this instance, I can recommend you to use another solution of GridinSoft – Trojan Killer Portable. It has a 14-days cost-free trial mode that offers the entire features of the paid version 7. This term will definitely be 100% enough to wipe malware out.


How To Decrypt .tisc Files?



Restore solution for big “.tisc files“

Try removing .tisc extension on a few BIG files and opening them. Either the Tisc ransomware read and did not encrypt the file, or it bugged and did not add the filemarker. If your files are very large (2GB+), the latter is most likely. Please, let me know in comments if that will work for you.




The newest extensions released around the end of August 2019 after the criminals made changes. This includes Wiot, Efdc, Lqqw, etc.

As a result of the changes made by the criminals, STOPDecrypter is no longer supported. It has been removed and replaced with the Emsisoft Decryptor for STOP Djvu Ransomware developed by Emsisoft and Michael Gillespie.

You can download free decryption tool here: Decryptor for STOP Djvu.

Download and run decryption tool.


Start downloading the decryption tool.

Make sure to launch the decryption utility as an administrator. You need to agree with the license terms that will come up. For this purpose, click on the “Yes” button:



As soon as you accept the license terms, the main decryptor user interface comes up:



Select folders for decryption.


Based on the default settings, the decryptor will automatically populate the available locations in order to decrypt the currently available drives (the connected ones), including the network drives. Extra (optional) locations can be selected with the help of the “Add” button.

Decryptors normally suggest several options considering the specific malware family. The current possible options are presented in the Options tab and can be activated or deactivated there. You may locate a detailed list of the currently active Options below.


Click on the “Decrypt” button.


As soon as yo add all the desired locations for decryption into the list, click on the “Decrypt” button in order to initiate the decryption procedure.

Note that the main screen may turn you to a status view, letting you know of the active process and the decryption statistics of your data:



The decryptor will notify you as soon as the decryption procedure is completed. If you need the report for your personal papers, you can save it by choosing the “Save log” button. Note that it is also possible to copy it directly to your clipboard and to paste it into emails or messages here if you need to do so.

The Emsisoft Decryptor might display different messages after a failed attempt to restore your tisc files:
✓ Error: Unable to decrypt file with ID: [your ID]
There is no corresponding decryption key in the Emsisoft decryptor’s database.
✓ No key for New Variant online ID: [your ID]
Notice: this ID appears to be an online ID, decryption is impossible
Your original files were encrypted with an online key. So no one else has the same encryption/decryption key pair. Recovery of tisc files without paying the criminals is impossible.
✓ Result: No key for new variant offline ID: [example ID]
This ID appears be an offline ID. Decryption may be possible in the future.
An offline key was used, but files could not be restored (the offline decryption key isn’t available yet). But, receiving this message is good news for you, because it might be possible to restore your tisc files in the future.
It can take a few weeks or months until the decryption key gets found and uploaded to the decryptor. Please follow updates regarding the decryptable DJVU versions here.
✓ Remote name could not be resolved
It’s an indication of a DNS issue on your PC. Our first recommendation is to reset your HOSTS file back to default.