Prince Ransomware – A New Threat In Cybersecurity

Prince now has a Windows Defender flag, namely “Ransom:Win64/PrinceRansom.YAA!MTB”. This means that Prince Ransomware will no longer bypass Windows Defender without modifications to remove the signature.

If, for whatever reason, bypassing Windows Defender is a priority for you, contact me on Telegram and I will accept payment for any changes you may require.

Brief Overview

Prince is a ransomware written from scratch in Go. It uses a mixture of ChaCha20 and ECIES cryptography in order to encrypt files securely so that they cannot be recovered by traditional recovery tools.

Files which have been encrypted by Prince can only be decrypted using the corresponding decryptor.

Installation And Setup

Pre-requisites:

• The Go Programming Language

Compiling The Builder

• In order to compile the builder program, you must run the Build.bat file.
• This will automatically download the dependencies and build the Builder.exe file in the current directory.

Building The Ransomware

• In order to build the encryptor and decryptor, you must run the Builder.exe program.
• Ensure that the builder is in the same directory as the Encryptor and Decryptor directories, as it will not be able to build them otherwise.
• The builder will generate a unique ECIES key pair and output the compiled executables to the current directory.
• The Prince-Built.exe file is the encryptor. Use caution when handling it as it can cause a lot of damage to your system.
• The Decryptor-Built.exe file is the decryptor. It will only decrypt files which were decrypted by the corresponding encryptor.

Encryption Process

• The encryptor enumerates all drives on the system, and proceeds to iterate through each directory recursively.
• It ignores blacklisted files, directories and extensions.
• It generates a unique ChaCha20 key and nonce for each file, and encrypts the file using a pattern of 1 byte encrypted, 2 bytes unencrypted.
• It encrypts the ChaCha20 key and nonce using the ECIES public key, and prepends them to the start of the file.

Benefits Of ChaCha20 And ECIES

I chose this unique combination of encryption methods for several reasons:

• ChaCha20’s stream-based approach allows for byte-by-byte encryption, enabling the pattern of 1 byte encrypted, 2 bytes unencrypted.
• ECIES offers similar security to RSA with shorter key lengths, making it a more efficient choice.

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