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Sysfrog Ransomware

Posted: May 27, 2019

The Sysfrog Ransomware is an extortion tool that cybercriminals may use to lock users out of their files, and then offer to restore everything to normal in exchange for money. Unfortunately, this file-locker attack can be very damaging because of its ability to encrypt the contents of a large variety of file formats – documents, images, archives, databases, backups, videos, etc. The files that the Sysfrog Ransomware locks also may undergo a slight name change – the ransomware will add the ‘.sysfrog’ extension to them, as well as the ‘[sysfrog@protonmail.com]’ prefix. For example, if the users have the file ‘spreadsheet.xlsx’ on their computers, the ransomware will rename it to ‘[sysfrog@protonmail.com]spreadsheet.xlsx.sysfrog’ once it is encrypted.

The authors of the Sysfrog Ransomware may opt to take advantage of different propagation techniques to distribute their threatening program to as many users as possible – fake email attachments is one of the most popular methods they are likely to use, but they also may opt to rely on alternative propagation options such as fake software updates and downloads or pirated content.

The Sysfrog Ransomware ends its attack by dropping the ransom message ‘how_to_decrypt.txt,’ which instructs the victim to purchase a decryptor if they want to get their files back. However, there is no proof that this decryptor exists and works so that we would not advise you to pay the 0.3 Bitcoin fee that the attackers demand. Do not forget that paying the attackers would mean cooperating with cyber crooks who might trick you, and may end up using the funding to develop more threatening projects. Sadly, there is no free decryption software when it comes to the Sysfrog Ransomware – the best bet of this threat’s victims would be to use an anti-malware scanner to dispose of the harmful program and then look into alternative data recovery options.

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