http://3.37.13.140:8080/2024-emergency-update.pdf

http://3.37.13.140:8080/ex.bat

http://3.37.13.140:8080/ex.ps1

import base64

def decode_base64_custom(encoded_string):
    # Define the character set used in the custom encoding
    chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/'

    # Prepare the mapping from custom Base64 back to standard Base64
    custom_mapping = {}

    for i, char in enumerate(chars):
        if i < 26:
            custom_mapping[char] = chr(i + ord('A'))
        elif i < 52:
            custom_mapping[char] = chr(i - 26 + ord('a'))
        elif i < 62:
            custom_mapping[char] = chr(i - 52 + ord('0'))
        elif char == '+':
            custom_mapping[char] = '+'
        elif char == '/':
            custom_mapping[char] = '/'

    # Decode the custom Base64 string back to the standard Base64 string
    standard_base64 = ''.join(custom_mapping[char] for char in encoded_string)

    # Add necessary padding
    padding_length = len(standard_base64) % 4
    if padding_length != 0:
        standard_base64 += '=' * (4 - padding_length)

    # Decode the Base64 string to get the original bytes
    decoded_bytes = base64.b64decode(standard_base64)

    # Convert bytes back to string (assuming UTF-8 encoding)
    original_string = decoded_bytes.decode('utf-8')

    return original_string

# Given encoded value
predefined_encoded_value = "qZb1mwrFEtb1x24WDgLJzv93Agf0j3nFy2HHBMDLzd8"

# Calculate the secret key
secret_key = decode_base64_custom(predefined_encoded_value)
print("The secret key is:", secret_key)

FIESTA{C0u1d_y0u_n0tice_what's_changed?}