Our security researchers recommend using Combo Cleaner. To eliminate possible malware infections, scan your computer with legitimate antivirus software. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection. Infected email attachments (macros), torrent websites, malicious ads, malicious installers for pirated software, pages offering to download videos from YouTube.Īll files are encrypted and cannot be opened without paying a ransom. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files. A ransom demand message is displayed on your desktop. Threat Summary: NameĪvast (Win32:TrojanX-gen ), AVG (Win32:TrojanX-gen ), Ikarus (), Kaspersky (UDS:), Microsoft (Trojan:Win32/Sabsik.FL.B!ml), 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). Most threat actors attempt to trick users into opening or executing malicious documents (e.g., Microsoft Office, PDF documents), executables, JavaScript files, files extracted from ZIP, RAR, and similar archive files, etc. Also, ransomware can be distributed via fake updaters and Trojans. In other cases, computer infections are caused by opening files downloaded from unreliable sources such as P2P networks, free file hosting sites, freeware download sites, various unofficial pages, etc. In all cases, users infect computers after they execute ransomware by themselves. Typically, Djvu ransomware is distributed via fake (malicious) installers for pirated software or cracking tools, emails containing malicious links or attachments, and deceptive pages offering to download videos from YouTube. It is advisable to have files backed up on a remote server or unplugged storage device to avoid paying for their decryption in case of a ransomware attack. More ransomware examples are Locked_fille, Flying Dutchman, and Dkey. Most ransomware variants modify filenames as well. In most cases, ransomware victims receive instructions on how to contact and (or) pay the attackers. The purpose of ransomware is to prevent victims from accessing (using) their files. Thus, victims should eliminate ransomware as soon as possible. It is also important to mention that removing ransomware from the operating system prevents any further encryptions. It is not recommended to pay cybercriminals since they often do not provide a decryption tool. Typically, victims can only recover files without tools purchased from the attackers if they have a third-party decryption tool or a data backup. They often distribute Djvu ransomware alongside other malware (for example, Vidar, RedLine, or other information-stealing malware). More about ransomwareĬybercriminals have been spotted using information stealers to obtain sensitive information before encrypting files with Djvu ransomware. It can be sent to the attackers via email before purchasing decryption tools. That file cannot contain valuable information. The ransom note provides two email addresses for contacting threat actors: and also mentions that victims can have one file decrypted for free. Decryption tools can be purchased for $490 on one condition - the attackers must be contacted within 72 hours. The ransom note says that the only way to recover files is to decrypt them with a decryption tool and a unique key that cost $980. Screenshot of files encrypted by Pohj ransomware: pohj" extension to filenames, and drops the " _readme.txt" file containing a ransom note.Īn example of how Pohj renames the encrypted files: it changes " 1.jpg" to " 1.jpg.pohj", " 2.png" to " 2.png.pohj", " 3.exe" to " 3.exe.pohj", and so forth. We discovered this ransomware while examining malware samples submitted to VirusTotal. Pohj is ransomware that belongs to the Djvu family (one of the most widespread ransomware families).
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