Badblock

BadBlock is a recognized threat actor in the cybersecurity industry, known for its involvement in malicious activities. These activities typically involve the execution of ransomware attacks that encrypt user files and demand a ransom for their decryption. This group has been linked to major ransomware variants such as Apocalypse, Xorist, Stampado, and BadBlock itself. The threat posed by this entity is significant given its potential to disrupt operations, compromise sensitive data, and cause substantial financial losses. Fortunately, decrypting tools like those provided by Emsisoft and AVG have proven effective against these ransomware attacks. These tools have successfully restored access to files encrypted by a variety of major ransomware including WannaCry, Petya, NotPetya, TeslaCrypt, DarkSide, REvil, Alcatraz Locker, Apocalypse, BadBlock, Bart, BTCWare, EncrypTile, and Globe. The consistent success of these tools in mitigating the impacts of ransomware attacks underlines their importance in the fight against cyber threats. In relation to the vulnerability CVE-2021-47055, it was first published by the vendor on February 29, 2024. The vulnerability pertains to the Linux kernel, specifically involving write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK, and OTPLOCK that modify protection bits. However, detailed CVSS scoring information is currently unavailable, indicating that an in-depth analysis of the vulnerability's severity and potential impact is still pending. As such, users are advised to regularly check back for updates regarding this vulnerability.