mirror of
https://github.com/volatilityfoundation/volatility3.git
synced 2026-09-30 05:24:52 +02:00
192 lines
8.3 KiB
Python
192 lines
8.3 KiB
Python
import collections.abc
|
|
|
|
from volatility.framework import constants, objects
|
|
from volatility.framework.symbols import generic
|
|
from volatility.framework import exceptions
|
|
|
|
# Keep these in a basic module, to prevent import cycles when symbol providers require them
|
|
|
|
class _EX_FAST_REF(objects.Struct):
|
|
"""This is a standard Windows structure that stores a pointer to an
|
|
object but also leverages the least significant bits to encode additional
|
|
details. When dereferencing the pointer, we need to strip off the extra bits."""
|
|
|
|
def dereference(self):
|
|
|
|
if constants.BANG not in self.vol.type_name:
|
|
raise ValueError("Invalid symbol table name syntax (no {} found)".format(constants.BANG))
|
|
|
|
# the mask value is different on 32 and 64 bits
|
|
symbol_table_name = self.vol.type_name.split(constants.BANG)[0]
|
|
if self._context.symbol_space.get_type(symbol_table_name + constants.BANG + "pointer").size == 4:
|
|
max_fast_ref = 7
|
|
else:
|
|
max_fast_ref = 15
|
|
|
|
return self._context.object(symbol_table_name + constants.BANG + "pointer", layer_name = self.vol.layer_name, offset = self.Object & ~max_fast_ref)
|
|
|
|
class ExecutiveObject(object):
|
|
"""This is used as a "mixin" that provides all kernel executive
|
|
objects with a means of finding their own object header."""
|
|
|
|
def object_header(self):
|
|
if constants.BANG not in self.vol.type_name:
|
|
raise ValueError("Invalid symbol table name syntax (no {} found)".format(constants.BANG))
|
|
symbol_table_name = self.vol.type_name.split(constants.BANG)[0]
|
|
body_offset = self._context.symbol_space.get_type(symbol_table_name + constants.BANG + "_OBJECT_HEADER").relative_child_offset("Body")
|
|
return self._context.object(symbol_table_name + constants.BANG + "_OBJECT_HEADER", layer_name = self.vol.layer_name, offset = self.vol.offset - body_offset)
|
|
|
|
class _CM_KEY_BODY(objects.Struct):
|
|
"""This represents an open handle to a registry key and
|
|
is not tied to the registry hive file format on disk."""
|
|
|
|
@property
|
|
def helper_full_key_name(self):
|
|
output = []
|
|
kcb = self.KeyControlBlock
|
|
while kcb.ParentKcb:
|
|
if kcb.NameBlock.Name == None:
|
|
break
|
|
output.append(kcb.NameBlock.Name.cast("string",
|
|
encoding = "utf8",
|
|
max_length = kcb.NameBlock.NameLength,
|
|
errors = "replace"))
|
|
kcb = kcb.ParentKcb
|
|
return "\\".join(reversed(output))
|
|
|
|
class _DEVICE_OBJECT(objects.Struct, ExecutiveObject):
|
|
@property
|
|
def helper_device_name(self):
|
|
header = self.object_header()
|
|
return header.NameInfo.Name.String
|
|
|
|
class _FILE_OBJECT(objects.Struct, ExecutiveObject):
|
|
def file_name_with_device(self):
|
|
name = ""
|
|
if self._context.memory[self.vol.layer_name].is_valid(self.DeviceObject):
|
|
name = "\\Device\\{}".format(self.DeviceObject.helper_device_name)
|
|
|
|
try:
|
|
name += self.FileName.String
|
|
except exceptions.PagedInvalidAddressException:
|
|
pass
|
|
|
|
return name
|
|
|
|
class _OBJECT_HEADER(objects.Struct):
|
|
@property
|
|
def NameInfo(self):
|
|
if constants.BANG not in self.vol.type_name:
|
|
raise ValueError("Invalid symbol table name syntax (no {} found)".format(constants.BANG))
|
|
|
|
symbol_table_name = self.vol.type_name.split(constants.BANG)[0]
|
|
|
|
try:
|
|
header_offset = ord(self.NameInfoOffset)
|
|
except AttributeError:
|
|
#http://codemachine.com/article_objectheader.html (Windows 7 and later)
|
|
name_info_bit = 0x2
|
|
|
|
layer = self._context.memory[self.vol.layer_name]
|
|
kvo = layer.config.get("kernel_virtual_offset", None)
|
|
|
|
if kvo == None:
|
|
raise AttributeError("Could not find kernel_virtual_offset for layer: {}".format(self.vol.layer_name))
|
|
|
|
ntkrnlmp = self._context.module(symbol_table_name, layer_name = self.vol.layer_name, offset = kvo)
|
|
address = ntkrnlmp.get_symbol("ObpInfoMaskToOffset").address
|
|
calculated_index = ord(self.InfoMask) & (name_info_bit | (name_info_bit - 1))
|
|
|
|
header_offset = ord(self._context.object(symbol_table_name + constants.BANG + "unsigned char",
|
|
layer_name = self.vol.layer_name,
|
|
offset = kvo + address + calculated_index))
|
|
|
|
header = self._context.object(symbol_table_name + constants.BANG + "_OBJECT_HEADER_NAME_INFO",
|
|
layer_name = self.vol.layer_name,
|
|
offset = self.vol.offset - header_offset)
|
|
return header
|
|
|
|
|
|
class _ETHREAD(objects.Struct):
|
|
def owning_process(self, kernel_layer = None):
|
|
"""Return the EPROCESS that owns this thread"""
|
|
return self.ThreadsProcess.dereference(kernel_layer)
|
|
|
|
|
|
class _UNICODE_STRING(objects.Struct):
|
|
@property
|
|
def helper_string(self):
|
|
# We explicitly do *not* catch errors here, we allow an exception to be thrown
|
|
# (otherwise there's no way to determine anything went wrong)
|
|
# It's up to the user of this method to catch exceptions
|
|
return self.Buffer.dereference().cast("string", max_length = self.Length, errors = "replace",
|
|
encoding = "utf16")
|
|
|
|
String = helper_string
|
|
|
|
|
|
class _EPROCESS(generic.GenericIntelProcess):
|
|
def add_process_layer(self, context, config_prefix = None, preferred_name = None):
|
|
"""Constructs a new layer based on the process's DirectoryTableBase"""
|
|
|
|
parent_layer = context.memory[self.vol.layer_name]
|
|
# Presumably for 64-bit systems, the DTB is defined as an array, rather than an unsigned long long
|
|
if isinstance(self.Pcb.DirectoryTableBase, objects.Array):
|
|
dtb = self.Pcb.DirectoryTableBase.cast("unsigned long long")
|
|
else:
|
|
dtb = self.Pcb.DirectoryTableBase
|
|
dtb = dtb & ((1 << parent_layer.bits_per_register) - 1)
|
|
|
|
# Add the constructed layer and return the name
|
|
return self._add_process_layer(context, dtb, config_prefix, preferred_name)
|
|
|
|
def load_order_modules(self):
|
|
"""Generator for DLLs in the order that they were loaded"""
|
|
|
|
if constants.BANG not in self.vol.type_name:
|
|
raise ValueError("Invalid symbol table name syntax (no {} found)".format(constants.BANG))
|
|
|
|
proc_layer_name = self.add_process_layer(self._context)
|
|
|
|
proc_layer = self._context.memory[proc_layer_name]
|
|
if not proc_layer.is_valid(self.Peb):
|
|
raise StopIteration
|
|
|
|
sym_table = self.vol.type_name.split(constants.BANG)[0]
|
|
peb = self._context.object("{}{}_PEB".format(sym_table, constants.BANG), layer_name = proc_layer_name,
|
|
offset = self.Peb)
|
|
|
|
for entry in peb.Ldr.InLoadOrderModuleList.to_list(
|
|
"{}{}_LDR_DATA_TABLE_ENTRY".format(sym_table, constants.BANG), "InLoadOrderLinks"):
|
|
yield entry
|
|
|
|
|
|
class _LIST_ENTRY(objects.Struct, collections.abc.Iterable):
|
|
def to_list(self, symbol_type, member, forward = True, sentinel = True, layer = None):
|
|
"""Returns an iterator of the entries in the list"""
|
|
|
|
if layer is None:
|
|
layer = self.vol.layer_name
|
|
|
|
relative_offset = self._context.symbol_space.get_type(symbol_type).relative_child_offset(member)
|
|
|
|
direction = 'Blink'
|
|
if forward:
|
|
direction = 'Flink'
|
|
link = getattr(self, direction).dereference()
|
|
|
|
if not sentinel:
|
|
yield self._context.object(symbol_type, layer, offset = self.vol.offset - relative_offset)
|
|
|
|
seen = {self.vol.offset}
|
|
while link.vol.offset not in seen:
|
|
|
|
obj = self._context.object(symbol_type, layer, offset = link.vol.offset - relative_offset)
|
|
yield obj
|
|
|
|
seen.add(link.vol.offset)
|
|
link = getattr(link, direction).dereference()
|
|
|
|
def __iter__(self):
|
|
return self.to_list(self.vol.parent.vol.type_name, self.vol.member_name)
|