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Matrix-CHE08 Ransomware

Posted: September 18, 2018

The Matrix-CHE08 Ransomware is a member of the Matrix Ransomware family of file-locker Trojans. Infections can result in being incapable of opening documents and other files on your computer after the Matrix-CHE08 Ransomware encrypts them. Remote attackers may introduce this Trojan to your PC by exploiting network vulnerabilities, such as unsecured RDP settings. Users should have backups prepared for keeping any encryption from causing data loss and use dedicated anti-malware tools for removing the Matrix-CHE08 Ransomware.

The Matrix Gets a Nametag Twist on Its Digital Prisoners

While the Matrix Ransomware is a much smaller family than, for instance, the freely-available Hidden Tear or the rented-out-for-profit Globe Ransomware family, its features for locking files and ransoming them are effective against most PC users similarly. Besides updating the encryption standards for extra security that keeps the victim's media from opening, new versions also are showing some minor changes in how they label the media in question. For example, malware experts can outline the Matrix-CHE08 Ransomware, which is most similar to the previous KOK8 Ransomware, from the same family.

The Matrix-CHE08 Ransomware is in distribution in the wild, although its victims have yet to come forward and provide details on how their PCs became compromised. Previous attacks by threat actors using variants of the Matrix-CHE08 Ransomware's family have made use of brute-force attacks for harvesting login credentials, as well as Remote Desktop features that give them manual control over the system. The Matrix-CHE08 Ransomware, whose encryption is still using an AES standard, is no less efficient at blocking documents, pictures, and other media over multiple drives than any of its predecessors.

However, malware analysts are finding a minor formatting discrepancy in how the Matrix-CHE08 Ransomware renames the files, which is a side feature in most of the Matrix Ransomware payloads. The Matrix-CHE08 Ransomware provides a new extension, an e-mail address (for the ransom negotiations) and a bracket-enclosed e-mail address, just like the KOK8 Ransomware, the Relock Ransomware, or the AskHelp@protonmail.com Ransomware. However, the extension and e-mail address don't match, which may be due to resource reuse or updates to accounts among the administrating threat actors. No statistics are available on whether or not this discrepancy is affecting the actual ransoming transactions.

The Only Jailbreak Plan that Your Files Need

The Matrix-CHE08 Ransomware, like file-locker Trojans of many families, uses a simple but secure standard for locking the files that third-party solutions can't resolve without additional information that only the threat actors possess: the custom decryption key. Users should protect any particularly vulnerable media by storing it in locations that malware experts would rate as being safe against these attacks. Removable storage drives and password-protected cloud servers are preferable options.

Although the Matrix-CHE08 Ransomware's campaign is most likely of compromising business entities with valuable files and the money for paying ransoms, recreational machines also are vulnerable to the same non-consensual, data-encrypting attacks. Disable RDP features when they're not in use, examine suspicious e-mail attachments with care, and minimize your use of untrustworthy download resources that are compromised or mislabeled frequently, such as torrents. Most anti-malware programs should block the Matrix-CHE08 Ransomware upon its installation attempt and stop any encryption damage, or, in a worst-case scenario, uninstall it afterward.

The small changes the Matrix-CHE08 Ransomware implements in its file-renaming routine are just another sign of criminals busying themselves re-organizing and repeating their attacks with different ransoming infrastructure. As diligent as they are, one would hope that the average computer owner is just as dutiful about backing up anything that matters.

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