When users download and execute the ransomware, their computers become infected. Ransomware variants from the Djvu family are primarily disseminated through email attachments or links containing malicious content, cracked software, and key generators hosted on shady web pages or dubious websites offering YouTube video downloads. It is usually the sole method to restore access to the files without needing to pay the ransom. Some examples of ransomware variants include Basn, Merlin, and Usr.Ī data backup is typically the most direct approach to recover files lost due to a ransomware attack. The perpetrator then demands payment for the decryption of the encrypted files, essentially using ransomware to extort money. Ransomware is malicious software that encrypts files and frequently alters their filenames. Ransomware is a pernicious form of malware that can cause additional encryptions and infections, making it crucial to remove it from infected systems as quickly as possible to prevent further damage. It is strongly advised not to pay the ransom, as there is no guarantee that the attackers will supply the decryption tools after receiving payment. Nevertheless, victims can circumvent paying the ransom and regain access to their files through alternative methods, such as utilizing a third-party decryption tool if one is accessible online or relying on a backup of their data. In most cases, retrieving encrypted files without obtaining the decryption tools from the attackers is unlikely. The note advises victims to reach out to the attackers via or within 72 hours and gives them the opportunity to acquire the decryption software and key for a reduced cost of $490 instead of the original price of $980.

Upon analyzing the ransom note named '_readme.txt,' we discovered that it includes payment and contact information. Screenshot of files encrypted by Tywd ransomware: An example of how Tywd modifies filenames: it renames ' 1.jpg' to ' 1.jpg.tywd', ' 2.png' to ' 2.png.tywd', and so forth. This particular strain of ransomware is a variant of the Djvu ransomware family and may be distributed in conjunction with other forms of malware, such as RedLine or Vidar. tywd' extension to the filename of each encrypted file and drops a ransom note (' _readme.txt'). Our team stumbled upon Tywd while monitoring the VirusTotal website for newly submitted malware samples. Tywd is a type of ransomware that encrypts files stored on a victim's computer and demands payment in exchange for decryption tools.

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