![]() ![]() The file “!!! READ THIS - IMPORTANT !!!.txt” contains the following ransom note seen in the screenshot below. Additionally, the ransomware creates a key file with name similar to: #9C43A95AC27D3A131D3E8A95F2163088-Bravo _ni_0day in C:ProgramData folder. In each folder with at least one encrypted file, the file "!!! READ THIS - IMPORTANT !!!.txt" can be found. ![]() ![]() The ransomware adds one of the following extensions to encrypted files: The ransomware adds the following extension. The encrypted files have the new extension '.obfuscated' appended at the end of the file name. BigBobRoss encrypts user's files using AES128 encryption. Avast Decryption Tool for AtomSilo and LockFile will work for both strains due to their similarities, even with different deployment tactics being used for each. AES_NI uses AES-256 combined with RSA-2048. Avast Decryption Tool for BigBobRoss can unlock files encrypted with the BigBobRoss ransomware. Avast Decryption Tool for AtomSilo and LockFile is released to decrypt files held by the AtomSilo and Lockfile ransomware strain. There are known multiple variants with different file extensions. All the Avast Decryption Tools are available in one zip here. Most of the messages look similar, as seen in the screenshots below.Avast Decryption Tool for AES_NI can help decrypt the AES_NI ransomware strain. ![]() Important: The provided decryption tool only supports files encrypted using an "offline key." In cases where the offline key was not used to encrypt files, our tool will be unable to restore the files, and no file modification will be done. The encryption is based on creating ZIP files - each encrypted file is a ZIP archive, containing the original document. However, if the server is not available or if the user is not connected to the internet, the ransomware will encrypt files with a fixed key ("offline key"). Avast Decryption Tool for FindZip unlocks the FindZip ransomware strain that spreads on Mac OS X (version 10.11 or newer). All the Avast Decryption Tools are available in one zip here.īoth variants encrypt files by using AES256 encryption with a unique encryption key downloaded from a remote server. Avast Decryption Tool for CryptoMix can unlock the CryptoMix ransomware (also known as CryptFile2 or Zeta) and later CryptoShield. ![]()
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