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: Nameġ2mdKVNfAhLbRDLtRWQFhQgydgU6bUMjay (Bitcoin)Īvast (Win32:Trojan-gen), Combo Cleaner (圜rypter.CEA6586E), ESET-NOD32 (Python/Filecoder.AC), Kaspersky (HEUR:), Microsoft (Ransom:Win32/PyrgenXlock.SK!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). The most popular distribution methods include: drive-by (stealthy and deceptive) downloads, online scams, untrustworthy download channels (e.g., unofficial and freeware sites, P2P sharing networks, etc.), malicious attachments and links in spam emails/messages, illegal software tools ("cracks"), and fake updates. Once such a file is opened - the infection chain is triggered. run, etc.), PDF and Microsoft Office documents, JavaScript, and so on. Virulent files can be archives (ZIP, RAR, etc.), executables (.exe. Malicious software is usually presented as or bundled with ordinary programs/media. Malware (ransomware included) is spread primarily using phishing and social engineering techniques. While this malware operates practically identically throughout, these programs have two major differences in-between - the cryptographic algorithms they use ( symmetric or asymmetric) and the ransom size. We have analyzed thousands of ransomware-type programs Zfdv, Craze, Ewdf, and Bright Black are a few examples of our latest finds. Hence, we highly recommend keeping backups in multiple different locations (e.g., remote servers, unplugged storage devices, etc.) - to avoid permanent data loss. The only solution is recovering them from a backup, if one was created prior and is stored elsewhere. However, removal will not restore already compromised files. To prevent CRYPTER v2.40 ransomware from encrypting more data - it must be eliminated from the operating system. Therefore, we strongly advise against paying and thereby inadvertently supporting this illegal activity. At the time of writing, this sum is worth approximately 2500 USD (note, exchange rates constantly fluctuate - hence, the conversion may be inaccurate).īased on our extensive experience researching ransomware infections, we can conclude that decryption is usually impossible without the attackers' interference.įurthermore, despite meeting the ransom demands - victims often do not receive the promised decryption tools. The pop-up contains a countdown and lists the ransom at 0.08134 BTC (Bitcoin cryptocurrency). Should the latter be the case, the message claims that victims will need to obtain individual decryption keys (for each device), and they will have to pay for them separately. The note implies that either only one of the victim's devices was affected or multiple - as the infection spread through the local network. Screenshot of files encrypted by CRYPTER v2.40 ransomware:ĬRYPTER v2.40 ransomware's message states that the inaccessible files have been encrypted. The text presented in this pop-up contained the ransom note. Once this process was completed, a pop-up window was displayed. For example, a file initially titled " 1.jpg" appeared as " 1.jpg.crypter", " 2.png" as " 2.png.crypter", and so on. Programs within this classification are designed to encrypt files and demand payment for the decryption.Īfter we launched a sample of CRYPTER v2.40 on our test machine, it encrypted files and appended their filenames with a ". CRYPTER v2.40 is a piece of malicious software classified as ransomware.
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