![]() A ransom demand message is displayed on your desktop. Threat Summary: NameĪvast (Win32:DropperX-gen ), Combo Cleaner (Trojan.Generic.32025745), ESET-NOD32 (A Variant Of Win32/Kryptik.HRKH), Kaspersky (HEUR:), Microsoft (Trojan:Win32/Redline.VIS!MTB), Full List Of Detections ( VirusTotal)Ĭannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). Files that they use to distribute malware are malicious MS Office or PDF documents, executables, archives (e.g., ZIP or RAR files), JavaScript files, ISO files, etc. Their goal is to trick users into doing so by themselves. Threat actors use different ways to lure users into downloading and executing ransomware. Typically, Djvu ransomware variants are distributed via fake installers for pirated software (or cracking tools, key generators), email (by sending malicious links or files), and untrustworthy websites offering to download videos from YouTube.Īlso, cybercriminals use Trojans, untrustworthy sources for downloading software (e.g., P2P networks, third-party downloaders, free file hosting websites, etc.), and fake updaters to proliferate ransomware. It is recommended to have a data backup stored on a remote server or unplugged storage device to avoid data loss in case of a ransomware attack. More ransomware examples are QuiDDoss, CRYPTONITE, and Venolock. Usually, ransomware encrypts files (and renames them) and generates a ransom note. Ransomware in generalĬybercriminals behind ransomware attacks use ransomware to blackmail victims. More data loss can be avoided by removing ransomware. While active, ransomware can cause further encryptions and spread over a local network (encrypt files stored on computers connected to that network). It is not recommended to pay the attackers because they may not provide a decryption tool even after meeting their demands. It is only possible to recover files without the interference of thrat actors when victims have their files backed up, or a working third-party decryption tool is available online. Victims can contact threat actors via or email address. Decryption tools cost $980 but will be sold for $490 if the attackers are contacted within 72 hours. It instructs victims to purchase decryption software and a unique key to restore access to files. Screenshot of files encrypted by Bozq ransomware:īozq's ransom note contains mainly contact and payment information. We also found that Djvu ransomware is often distributed alongside other malware (e.g., RedLine and Vidar).Īn example of how Bozq renames files: it changes " 1.jpg" to " 1.jpg.bozq", " 2.png" to " 2.png.bozq", and so forth. Our team discovered this ransomware while inspecting malware samples submitted to VirusTotal. Also, Bozq creates the " _readme.txt" file containing a ransom note. Bozq is one of the Djvu ransomware variants. ![]()
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