mirror of
https://github.com/volatilityfoundation/volatility
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iMHLv2
218 lines
7.6 KiB
Python
218 lines
7.6 KiB
Python
# Volatility
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#
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# Authors:
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# Michael Hale Ligh <michael@memoryanalysis.net>
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#
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# This file is part of Volatility.
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#
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# Volatility is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Volatility is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import volatility.obj as obj
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import volatility.utils as utils
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import volatility.plugins.taskmods as taskmods
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#--------------------------------------------------------------------------------
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# object classes
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#--------------------------------------------------------------------------------
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class _HEAP(obj.CType):
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""" A Heap on XP and 2003 """
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def is_valid(self):
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return obj.CType.is_valid(self) and self.Signature == 0xeeffeeff
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def segments(self):
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""" A list of the _HEAP_SEGMENTs.
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This is an array of pointers so we have to deref
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before returning or the caller will be calling
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is_valid on the pointer and not the object.
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"""
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return [seg.dereference() for seg in self.Segments if seg != 0]
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class _HEAP_SEGMENT(obj.CType):
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""" A Heap Segment on XP and 2003 """
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def is_valid(self):
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return obj.CType.is_valid(self) and self.Signature == 0xffeeffee
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def heap_entries(self):
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"""Enumerate the heaps in this segment.
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##FIXME:
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* Raise ValueError if corruptions are detected.
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* Should we start at FirstEntry or Entry?
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"""
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next = self.Entry #FirstEntry.dereference()
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last = self.LastValidEntry.dereference()
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chunk_size = self.obj_vm.profile.get_obj_size("_HEAP_ENTRY")
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while (next and
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next.obj_offset < last.obj_offset):
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yield next
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next = obj.Object("_HEAP_ENTRY",
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offset = next.obj_offset + next.Size * chunk_size,
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vm = next.obj_vm)
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class _HEAP_ENTRY(obj.CType):
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""" A Heap Entry """
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def get_data(self):
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chunk_size = self.obj_vm.profile.get_obj_size("_HEAP_ENTRY")
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return self.obj_vm.zread(
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self.obj_offset + chunk_size,
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self.Size * chunk_size
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)
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def get_extra(self):
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chunk_size = self.obj_vm.profile.get_obj_size("_HEAP_ENTRY")
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return obj.Object("_HEAP_ENTRY_EXTRA",
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offset = self.obj_offset + (chunk_size * (self.Size - 1)),
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vm = self.obj_vm)
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#--------------------------------------------------------------------------------
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# profile modifications
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#--------------------------------------------------------------------------------
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class XPHeapModification(obj.ProfileModification):
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before = ["WindowsObjectClasses"]
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conditions = {'os': lambda x: x == 'windows',
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'major': lambda x : x == 5,
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'memory_model' : lambda x : x == '32bit'}
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def modification(self, profile):
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heap_flags = {
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'HEAP_NO_SERIALIZE': 0,
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'HEAP_GROWABLE': 1,
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'HEAP_GENERATE_EXCEPTIONS': 2,
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'HEAP_ZERO_MEMORY': 3,
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'HEAP_REALLOC_IN_PLACE_ONLY': 4,
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'HEAP_TAIL_CHECKING_ENABLED': 5,
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'HEAP_FREE_CHECKING_ENABLED': 6,
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'HEAP_DISABLE_COALESCE_ON_FREE': 7,
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'HEAP_SETTABLE_USER_VALUE': 8,
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'HEAP_CREATE_ALIGN_16': 16,
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'HEAP_CREATE_ENABLE_TRACING': 17,
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'HEAP_CREATE_ENABLE_EXECUTE': 18,
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'HEAP_FLAG_PAGE_ALLOCS': 24,
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'HEAP_PROTECTION_ENABLED': 25,
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'HEAP_CAPTURE_STACK_BACKTRACES': 27,
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'HEAP_SKIP_VALIDATION_CHECKS': 28,
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'HEAP_VALIDATE_ALL_ENABLED': 29,
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'HEAP_VALIDATE_PARAMETERS_ENABLED': 30,
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'HEAP_LOCK_USER_ALLOCATED': 31,
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}
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entry_flags = {
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#'HEAP_ENTRY_BUSY': 0,
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"busy": 0,
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#'HEAP_ENTRY_EXTRA_PRESENT': 1,
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"extra": 1,
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#'HEAP_ENTRY_FILL_PATTERN': 2,
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"fill": 2,
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#'HEAP_ENTRY_VIRTUAL_ALLOC': 3,
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"virtual": 3,
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#'HEAP_ENTRY_LAST_ENTRY': 4,
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"last": 4,
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#'HEAP_ENTRY_SETTABLE_FLAG1': 5,
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"flag1": 5,
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#'HEAP_ENTRY_SETTABLE_FLAG2': 6,
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"flag2": 6,
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#'HEAP_ENTRY_SETTABLE_FLAG3': 7
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"flag3": 7
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}
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profile.merge_overlay({
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'_HEAP': [ None, {
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'Flags': [ None, ['Flags', {'bitmap': heap_flags}]],
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'ForceFlags': [ None, ['Flags', {'bitmap': heap_flags}]],
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}],
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'_HEAP_FREE_ENTRY': [ None, {
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'Flags': [ None, ['Flags', {'target': 'unsigned char', 'bitmap': entry_flags}]],
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}],
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'_HEAP_ENTRY': [ None, {
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'Flags': [ None, ['Flags', {'target': 'unsigned char', 'bitmap': entry_flags}]],
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}],
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'_HEAP_SEGMENT': [ None, {
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'Flags': [ None, ['Flags', {'bitmap': {'HEAP_USER_ALLOCATED': 0}}]],
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}],
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})
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profile.object_classes.update({
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'_HEAP_ENTRY': _HEAP_ENTRY,
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'_HEAP': _HEAP,
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'_HEAP_SEGMENT': _HEAP_SEGMENT,
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})
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class Notepad(taskmods.DllList):
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"""List currently displayed notepad text"""
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def __init__(self, config, *args, **kwargs):
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taskmods.DllList.__init__(self, config, *args, **kwargs)
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config.add_option("DUMP-DIR", short_option = "D", default = None,
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help = "Dump binary data to this directory")
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@staticmethod
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def is_valid_profile(profile):
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return (profile.metadata.get('os', 'unknown') == 'windows' and
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profile.metadata.get('major', 0) == 5)
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def render_text(self, outfd, data):
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for task in data:
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# only looking for notepad
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if str(task.ImageFileName).lower() != "notepad.exe":
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continue
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outfd.write("Process: {0}\n".format(task.UniqueProcessId))
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entry_size = task.obj_vm.profile.get_obj_size("_HEAP_ENTRY")
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heap = task.Peb.ProcessHeap.dereference_as("_HEAP")
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for segment in heap.segments():
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for entry in segment.heap_entries():
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# the extra heap data is present
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if "extra" not in str(entry.Flags):
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continue
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text = obj.Object("String",
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offset = entry.obj_offset + entry_size,
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vm = task.get_process_address_space(),
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length = entry.Size * entry_size,
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encoding = "utf16")
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if not text or len(text) == 0:
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continue
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if self._config.DUMP_DIR:
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name = "notepad.{0}.txt".format(task.UniqueProcessId)
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path = os.path.join(self._config.DUMP_DIR, name)
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with open(path, "wb") as handle:
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handle.write(entry.get_data())
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outfd.write("Dumped To: {0}\n".format(path))
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outfd.write("Text:\n{0}\n\n".format(text)) |