Viruses such as *.thor are distributed using spam emails (malicious attachments), peer-to-peer (P2P) networks (for example, Torrent, eMule, etc.), fake software update tools, and trojans. As with *.thor, malware such as Cerber, CTB-Locker, and Cry also encrypt files and demand hundreds or even thousands of dollars. There are only two major differences: size of ransom and type of cryptography used (symmetric/asymmetric). Screenshot of a message (wallpaper) encouraging users to pay a ransom to decrypt their compromised data:Īll ransomware-type viruses are virtually identical. Unfortunately, there are currently no tools available to decrypt compromised files free of charge - the only solution is to restore your files/system from a backup. Therefore we strongly advise you to ignore all requests to pay or contact these people. If you pay, there is a high probability that you will be scammed. Cyber criminals often ignore victims, despite payments made. To restore their files, victims must supposedly pay a ransom of 3 Bitcoins (currently equivalent to ~$1952), however, paying does not guarantee that your files will ever be decrypted. Claims that decryption without this key is impossible are in unfortunately correct. The private key is stored on remote servers owned by cyber criminals. Therefore, two keys (public and private ) are generated during encryption. As mentioned above, *.thor encrypts files using asymmetric cryptography. The message also states that the files can only be restored using a private key with a decryption tool. bmp files contain an identical ransom-demand message stating that files are encrypted using RSA-2048 and AES-128 encryption algorithms. bmp, both named " _WHAT_is") on the desktop and changes the desktop wallpaper. Once files are encrypted, *.thor places two files (.html and. For example, the name of an encrypted file might be renamed to " D56F3331-380D-9317-3F9C-6CE2C2BB051.thor". Following infiltration, *.thor encrypts various files using asymmetric cryptography.ĭuring encryption, this ransomware renames files using the " -.thor" pattern. Developers spread this ransomware via spam emails. *.thor is a new variant of Locky ransomware.
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January 2023
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