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When a Trojan is installed, it can be used to install other malware. These programs often cause chain infections. These programs are also known as 'cracking' tools. Rather than activating licensed software, they install malware.

Unofficial activation tools infect systems in a similar way. Furthermore, fake software update tools infect systems by downloading and installing malicious software rather than updating installed program or by exploiting bugs, flaws of outdated software. People who open files that are downloaded from channels of this type risk installing malware. Cyber criminals use these channels to disguise malicious files as legitimate, harmless, etc.

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Ransomware and other malware can be distributed through dubious file or software download sources.Įxamples of such sources are Peer-to-Peer networks (torrent clients, eMule), unofficial pages, third party downloaders, free file hosting websites or pages that contain freeware.

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Typically, cyber criminals attach files such as Microsoft Office documents, PDF documents, archive files such as ZIP, RAR, JavaScript files, executable files such as. If opened, the attachment infects the computer with malware.

Emails are sent that contain a malicious attachment (or website link that leads to download of the file). Malware such as Shariz can be proliferated in a number of ways. To avoid data and financial loss caused through ransomware, have data backed up and keep backups on remote servers such as Cloud or unplugged storage devices. In most cases, only cyber criminals have the correct decryption tools, and it is impossible to decrypt files without them, unless ransomware is still in development (is not complete, has bugs, flaws, etc.). Main differences are usually cost of decryption software and/or keys and encryption algorithm ( symmetric or asymmetric) used to lock victims' data. Shariz functions like many other ransomware-type programs (including Seto, HILDACRYPT, Lbkut, etc.): it encrypt files and encourages victims to pay ransoms. Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data: To avoid being scammed, do not trust cyber criminals and recover your files from a backup. Note, however, that cyber criminals who designed the ransomware often do not keep their promises or send any tools, even if their ransom demands are met. The only way to recover encrypted files is to use specific decryption tools/keys. Typically, ransomware-type programs encrypt files with strong encryption algorithms that are impossible to 'crack'. Unfortunately, decryption of other files can be performed using tools held only by Shariz developers. Cyber criminals offer free decryption of one file, which can be sent via one of the email addresses provided. After 72 hours, the cost increases to $980. Victims who make contact within 72 hours are able to purchase decryption tools for $490.

People who have computers infected with Shariz ransomware are instructed to contact the developers via the or email address immediately, since this will determine the cost of a decryption tool and key.

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It also creates a ransom message within a text file named ' _readme.txt', which contains instructions about how to purchase a decryption tool and key. shariz' extension.įor example, ' 1.jpg' becomes ' 1.jpg.shariz'. Like many other programs of this type, Shariz encrypts all victims' files and renames them by adding a new extension. Discovered by Michael Gillespie, Shariz is a malicious program that belongs to the Djvu ransomware family.