CryptXXX is ransomware crypto-virus. It encrypts user personal data with AES CBC 256-bit algorithm and asks for RSA-4096 key. Actually, CryptXXX Ransomware also steals bitcoins stored on the computer if there are any. Virus modifies names and extension of all encrypted files to .crypt, .cryp1 or .crypz, changes desktop wallpaper using de_crypt_readme.bmp (image with black background and white text), creates text file with instructions to pay the ransom (de_crypt_readme.txt), and html file with the same instructions (de_crypt_readme.html). Ransom is about 1.2 BitCoins or $400. CryptXXX Ransomware attacks data on local drives and attached storage devices.
UltraCrypter is new version of ransomware that belong to the family of CryptXXX. It distributes via Angler Exploit Kit. It uses the same RSA-4096 encryption algorithm, but another type of decryption keys, that is why there are NO available 100% working decryptors yet. UltraCrypter adds .cryp1 extensions to all affected files. The ransom is 1.2 Bitcoins ($567.6). Malefactors give 96 hours to pay this amount, otherwise it will double to 2.4 Bitcoins.