Viruses

BLASSA Ransomware is a type of malware that specifically targets the personal data of its victims, employing encryption techniques to render files inaccessible. Like many ransomware variants, it attacks individual files, appending the distinctive .blassa extension to each file's original name. This extension signifies that a file has been encrypted and cannot be accessed without the correct decryption key. The ransomware employs robust military-grade encryption methods, making manual decryption attempts exceedingly difficult, if not impossible. Upon completing the encryption process, BLASSA generates a ransom note in the form of a text file. This file, named RESTORES_FILESDESKTOP-[random_string].txt, is strategically placed on the victim's desktop. The note informs the victim of the encryption and demands a ransom payment of 400 USD in exchange for the decryption key. It also typically includes contact information for the attackers, discourages contacting authorities, and warns against altering the encrypted files.

NotLockBit Ransomware poses as a dangerous cyber threat masquerading as the popular LockBit ransomware. Targeting both Windows and Mac operating systems, it encrypts and exfiltrates essential data, rendering files inaccessible and making data recovery challenging. Once it infiltrates a system, it renames the files by appending a distinctive extension, which is .abcd, to the original filename. For instance, a file named document.pdf might be renamed to document.pdf.[random_string].abcd. This process obliterates the original identifiers of the files, making the victims painfully aware of the attack's severity. Furthermore, NotLockBit employs a robust encryption algorithm to secure its hold over the files, making straightforward decryption a Herculean task without access to the correct keys. In addition to file encryption, the ransomware also alters the desktop wallpaper to further emphasize its malicious presence. Instructions for ransom payment and communication are conveyed through a ransom note, typically called README.txt, strategically placed in folders housing encrypted files and replacing the desktop wallpaper, gravely notifying users of their predicament.

FIOI Ransomware is a malicious software variant belonging to the notorious Makop family, primarily designed to target individual and corporate systems by locking users' files and demanding a ransom for their decryption. Once this ransomware infiltrates a system, it swiftly encrypts files using a robust encryption algorithm, rendering them inaccessible without the proper decryption key. As it goes about its malicious duties, it appends the .FIOI extension to the filenames, which is followed by a string of random characters and an email address—such as changing document.pdf to document.pdf.[B3FJ0LP4].[help24dec@aol.com].FIOI. In addition to encryption, the ransomware alters the desktop wallpaper, signaling a successful breach, and disseminates its ransom demand through a file titled +README-WARNING+.txt, placed in various directories. This note informs affected users of their files' encryption status and provides two contact email addresses for negotiations, stressing that cooperating with the attacker's demands is the sole path to data recovery.

NK Ransomware is a type of malicious software that encrypts files on an infected system, demanding a ransom for their decryption. Identified by its association with the Chaos ransomware variant, NK Ransomware appends a distinctive file extension composed of four random characters to each encrypted file, such as transforming 1.jpg into 1.jpg.we2b. Upon completing the encryption process, it alters the desktop wallpaper and creates a clear ransom note titled read_it.txt. This note explicitly informs victims that their files are encrypted and instructs them to purchase decryption software from the attackers for 5 LTC (Litecoin cryptocurrency), approximately equal to $360, contingent on current exchange rates. Victims are typically given a strict deadline of 24 hours to meet these demands. The note does not guarantee decryption even if the ransom is paid, as cybercriminals are notorious for not providing the decryption tools even after payment.

Anonymous France Ransomware emerged as a menacing threat to digital files and personal data, designed specifically to extort money by encrypting user files and demanding ransom for the decryption keys. Once this ransomware infiltrates a system, it begins encrypting files using a robust encryption algorithm, rendering them inaccessible without a specific decryption key possessed by the attackers. It appends a unique extension, .AnonymousFrance, to the encrypted files, indicating their compromised status. For instance, document.docx becomes document.docx.AnonymousFrance, signifying that the file has been locked. Victims discover the attack through various ransom notes labeled from README1.txt to README10.txt across their desktops, urging them to pay $100 in Monero cryptocurrency to a provided wallet address, with threats of permanently losing their files if demands are not met within a specific timeframe.

PlayBoy LOCKER Ransomware is a malicious software designed to encrypt personal files on an infected system, effectively locking users out of their own data. This ransomware appends the .PLBOY extension to the filenames of the encrypted files, turning something like document.docx into document.docx.PLBOY. It uses complex encryption algorithms that make it nearly impossible to decrypt the files without a specific decryption key, which only the attackers purportedly possess. Upon infecting a system, the ransomware not only encrypts files but also generates a ransom note. This ransom note is typically saved as a text file named INSTRUCTIONS.txt, which is placed in each folder containing encrypted files. Additionally, the ransomware often modifies the desktop wallpaper of the infected computer, providing a visual reminder of the attack and directing the victim to follow specific instructions contained in the note to contact the attackers.

PUABundler:Win32/MediaGet is a designation for a potentially unwanted software linked to the MediaGet program, a BitTorrent client with origins in Russia. While initially marketed as a torrent client, MediaGet has evolved into a platform for accessing pirated content, often bundled with additional software during installation. Users frequently encounter it via recommendations on websites distributing unlicensed software or as a part of other free applications. The software is notorious for its ability to install various unwanted programs, which can be challenging to remove. Despite not being inherently malicious, its monetization strategies and installation tricks raise security concerns. Microsoft Defender often flags this software due to its potential risks, such as turning devices into proxy servers for an ad-free experience. Removing MediaGet alone does not typically eliminate all its components, necessitating specialized tools for a thorough cleanup.

Behavior:Win32/AMSI_Patch_T.B13 is a detection name used by Windows Defender to identify a particular type of threat that manipulates the Antimalware Scan Interface (AMSI) on Windows systems. This threat can execute potentially unwanted applications, making it a significant concern for users who rely on the built-in security features of Windows. Typically, this detection is linked to activities that aim to disable or bypass AMSI, which is an essential component for identifying and blocking malicious code before it runs. The presence of this threat might indicate that a system is compromised by malware designed to evade detection by antivirus tools. Although it can be associated with legitimate software tampering with AMSI for benign reasons, it’s crucial for users to investigate and confirm the legitimacy of the application responsible. Ignoring this warning could leave systems vulnerable to a wide array of attacks, including data breaches and unauthorized access. Users encountering this detection should promptly use a reputable antivirus solution to scan and clean their systems, ensuring their devices are free from potential threats.