.777 is file extension of files encrypted by recently appeared ransomware called 777 Virus or 777 Ransomware, that targets computers running Windows OS. Malware uses asymmetric encryption and generates two decryption keys (private and public). Hackers ask for ransom of $500 or $1500 to decrypt files. Usually users have to pay in BitCoins. Users need to send an e-mail to email@example.com to receive message like shown below, with instructions to pay the ransom.
ENCRYPTED is categorized as crypto-virus and ransomware. ENCRYPTED targets .pdf, .doc, .ppt and many other types of files and encrypts them asking for ransom to decrypt. Attributes of ENCRYPTED virus are: ransomware modifies desktop background to the picture that contains instructions to decrypt files, it modifies encrypted files adding .encrypted extension, it creates text file "Read Me (How Decrypt) !!!!.txt" in every folder that contains encrypted files, ENCRYPTED asks ransom between 0.5 - 1.5 BTC (bitcoins) which is around $400.
Infected with CryptXXX? Need to decrypt your files? What is CryptXXX CryptXXX is another ransomware virus that is distributed with Angler Exploit Kit and is related to the developers of Reveton ransomware. It uses RSA-4096 algorithm to encrypt user files…
CTB-Locker (Curve-Tor-Bitcoin Locker) belongs to the family of ransomware viruses. It is also known as Critroni ransomware. This is also crypto-virus and it uses RSA 2048 encryption to encrypt sensitive files and folders. Usually CTB-Locker encrypts user documents, photos, music and other types of personal information. After this it asks for a ransom in bitcoins (0.3 or $120). CTB-Locker modifies file names and extensions of encrypted files. All affected files get .ctb or .ctb2 extension.
TeslaCrypt is virus that belongs to ransomware category of crypto-viruses. TeslaCrypt encrypts important documents, images, presentations using AES encryption. Then it demands a payment (ransom) for decryption key that will allow user to restore the files. One of the "features" of TeslaCrypt is that it also encrypts game files of 40+ popular games like Dota, Minecraft, World of Warcraft etc.