Ryuk has used a combination of symmetric (AES) and asymmetric (RSA) encryption to encrypt files. RobbinHood will search for an RSA encryption key and then perform its encryption process on the system files. REvil can encrypt files on victim systems and demands a ransom to decrypt the files. Ragnar Locker encrypts files on the local machine and mapped drives prior to displaying a note demanding a ransom. Pysa has used RSA and AES-CBC encryption algorithm to encrypt a list of targeted file extensions. Pay2Key can encrypt data on victim's machines using RSA and AES algorithms in order to extort a ransom payment for decryption. NotPetya encrypts user files and disk structures like the MBR with 2048-bit RSA. Netwalker can encrypt files on infected machines to extort victims. MegaCortex has used the open-source library, Mbed Crypto, and generated AES keys to carry out the file encryption process. Maze has used the ChaCha algorithm, based on Salsa20, and an RSA algorithm to encrypt files. Maze has disrupted systems by encrypting files on targeted machines, claiming to decrypt files if a ransom payment is made.
#Mac program for encrypted data windows
LockerGoga has encrypted files, including core Windows OS files, using RSA-OAEP MGF1 and then demanded Bitcoin be paid for the decryption key. JCry has encrypted files and demanded Bitcoin to decrypt those files. Indrik Spider has encrypted domain-controlled systems using BitPaymer. Įgregor can encrypt all non-system files using a hybrid AES-RSA algorithm prior to displaying a ransom note. Conti can use "Windows Restart Manager" to ensure files are unlocked and open for encryption.
It has used a different AES-256 encryption key per file with a bundled RAS-4096 public encryption key that is unique for each victim. Ĭonti can use CreateIoCompletionPort(), PostQueuedCompletionStatus(), and GetQueuedCompletionPort() to rapidly encrypt files, excluding those with the extensions of.
īitPaymer can import a hard-coded RSA 1024-bit public key, generate a 128-bit RC4 key for each file, and encrypt the file in place, appending.
ĪPT41 used a ransomware called Encryptor RaaS to encrypt files on the targeted systems and provide a ransom note to the user. ĪPT38 has used Hermes ransomware to encrypt files with AES256. In cloud environments, storage objects within compromised accounts may also be encrypted. To maximize impact on the target organization, malware designed for encrypting data may have worm-like features to propagate across a network by leveraging other attack techniques like Valid Accounts, OS Credential Dumping, and SMB/Windows Admin Shares. In some cases, adversaries may encrypt critical system files, disk partitions, and the MBR.
#Mac program for encrypted data code
In the case of ransomware, it is typical that common user files like Office documents, PDFs, images, videos, audio, text, and source code files will be encrypted. This may be done in order to extract monetary compensation from a victim in exchange for decryption or a decryption key (ransomware) or to render data permanently inaccessible in cases where the key is not saved or transmitted. They can attempt to render stored data inaccessible by encrypting files or data on local and remote drives and withholding access to a decryption key. Adversaries may encrypt data on target systems or on large numbers of systems in a network to interrupt availability to system and network resources.
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