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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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require 'metasploit/framework/credential_collection'
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require 'metasploit/framework/login_scanner/ftp'
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class MetasploitModule < Msf::Auxiliary
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  include Msf::Exploit::Remote::Ftp
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  include Msf::Auxiliary::Scanner
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  include Msf::Auxiliary::Report
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  include Msf::Auxiliary::AuthBrute
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  def proto
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    'ftp'
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  end
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  def initialize
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    super(
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      'Name'        => 'FTP Authentication Scanner',
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      'Description' => %q{
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        This module will test FTP logins on a range of machines and
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        report successful logins.  If you have loaded a database plugin
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        and connected to a database this module will record successful
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        logins and hosts so you can track your access.
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      },
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      'Author'      => 'todb',
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      'References'     =>
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        [
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          [ 'CVE', '1999-0502'] # Weak password
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        ],
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      'License'     => MSF_LICENSE,
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      'DefaultOptions' => {
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        'ConnectTimeout' => 30
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      }
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    )
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    register_options(
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      [
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        Opt::Proxies,
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        Opt::RPORT(21),
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        OptBool.new('RECORD_GUEST', [ false, "Record anonymous/guest logins to the database", false])
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      ])
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    register_advanced_options(
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      [
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        OptBool.new('SINGLE_SESSION', [ false, 'Disconnect after every login attempt', false]),
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      ]
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    )
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    deregister_options('FTPUSER','FTPPASS') # Can use these, but should use 'username' and 'password'
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    @accepts_all_logins = {}
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  end
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  def run_host(ip)
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    print_status("#{ip}:#{rport} - Starting FTP login sweep")
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    cred_collection = build_credential_collection(
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        username: datastore['USERNAME'],
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        password: datastore['PASSWORD'],
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        prepended_creds: anonymous_creds
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    )
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    scanner = Metasploit::Framework::LoginScanner::FTP.new(
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      configure_login_scanner(
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        host: ip,
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        port: rport,
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        proxies: datastore['PROXIES'],
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        cred_details: cred_collection,
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        stop_on_success: datastore['STOP_ON_SUCCESS'],
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        bruteforce_speed: datastore['BRUTEFORCE_SPEED'],
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        max_send_size: datastore['TCP::max_send_size'],
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        send_delay: datastore['TCP::send_delay'],
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        connection_timeout: datastore['ConnectTimeout'],
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        ftp_timeout: datastore['FTPTimeout'],
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        framework: framework,
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        framework_module: self,
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        ssl: datastore['SSL'],
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        ssl_version: datastore['SSLVersion'],
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        ssl_verify_mode: datastore['SSLVerifyMode'],
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        ssl_cipher: datastore['SSLCipher'],
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        local_port: datastore['CPORT'],
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        local_host: datastore['CHOST']
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      )
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    )
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    scanner.scan! do |result|
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      credential_data = result.to_h
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      credential_data.merge!(
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          module_fullname: self.fullname,
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          workspace_id: myworkspace_id
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      )
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      if result.success?
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        credential_data[:private_type] = :password
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        credential_core = create_credential(credential_data)
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        credential_data[:core] = credential_core
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        create_credential_login(credential_data)
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        print_good "#{ip}:#{rport} - Login Successful: #{result.credential}"
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      else
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        invalidate_login(credential_data)
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        vprint_error "#{ip}:#{rport} - LOGIN FAILED: #{result.credential} (#{result.status}: #{result.proof})"
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      end
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    end
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  end
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  # Always check for anonymous access by pretending to be a browser.
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  def anonymous_creds
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    anon_creds = [ ]
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    if datastore['RECORD_GUEST']
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      ['IEUser@', 'User@', '[email protected]', '[email protected]' ].each do |password|
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        anon_creds << Metasploit::Framework::Credential.new(public: 'anonymous', private: password)
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      end
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    end
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    anon_creds
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  end
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  def test_ftp_access(user,scanner)
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    dir = Rex::Text.rand_text_alpha(8)
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    write_check = scanner.send_cmd(['MKD', dir], true)
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    if write_check and write_check =~ /^2/
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      scanner.send_cmd(['RMD',dir], true)
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      print_status("#{rhost}:#{rport} - User '#{user}' has READ/WRITE access")
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      return 'Read/Write'
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    else
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      print_status("#{rhost}:#{rport} - User '#{user}' has READ access")
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      return 'Read-only'
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    end
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  end
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end
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