The ransom note left by TISC ransomware is named _readme.txt and is identical in each folder where it was placed by the virus. Speaking of file repair, Media_Repair by DiskTuna can help you to repair specific file formats with small data portion at the beginning of the file missing. Additionally, you can use the guide given below this article which explains how to decrypt or repair files locked by STOP/DJVU versions. The number one method is to use a data backup if you had one created prior to the attack (the ransomware must be removed from the system before attempting to do this). However, if your files were encrypted, there are some methods you can try to restore or repair at least part of them. In other words, they turn victim’s files into hostages and try to extort the victim financially. The cybercriminals who operate this ransomware suggest purchasing this key along with decryption software for a specified price. The encryption algorithm is known to be military-grade and is typically used to secure information between two endpoints so that only the one who has the decryption key could decrypt and view it. The algorithm of this malicious software is programmed to encrypt the very first 150 KB of each file, which makes the attack process speedy yet enough to make files inaccessible to the original owner. TISC ransomware virus is used solely to extort computer users by taking their files hostage and demanding to pay a ransom. This virus’ variant is known to provide new contact email unseen in previous STOP/DJVU versions – and already known one –. The payment must be made in cryptocurrency such as Bitcoin to preserve the attackers’ identity. The attackers also present pricing of the tools – it costs $490 if the victim contacts the attackers within 72 hours or $980 later. This text file contains a message from cybercriminals behind the malware who suggest that the only way to get TISC decryption tool and key is to pay a ransom for them.

The virus also drops ransom-demanding notes called _readme.txt in every folder including desktop. For example, file originally called 1.jpg appears as 1.jpg.tisc after the cyber attack. tisc file extension to make the file distinguishable. Once encrypted, each file gets appended with additional. It uses Salsa20 algorithm to make victim’s files inaccessible. TISC ransomware is a variant of STOP/DJVU file-encrypting computer virus family.

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