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Merge pull request volatilityfoundation#1069 from dgmcdona/dgmcdona/w…
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…indows_svcscan

Windows: SvcScan Binary Info
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@ikelos
ikelos authored Jan 30, 2024
2 parents 497d291 + 43e8e01 commit 2b15f3f
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Showing 9 changed files with 1,723 additions and 69 deletions.
2 changes: 1 addition & 1 deletion volatility3/framework/interfaces/context.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@ def object(
offset: int,
native_layer_name: str = None,
**arguments,
):
) -> "interfaces.objects.ObjectInterface":
"""Object factory, takes a context, symbol, offset and optional
layer_name.
Expand Down
247 changes: 179 additions & 68 deletions volatility3/framework/plugins/windows/svcscan.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4,25 +4,42 @@

import logging
import os
from typing import List
from typing import Dict, List, NamedTuple, Optional, Tuple, Union, cast

from volatility3.framework import interfaces, renderers, constants, symbols, exceptions
from volatility3.framework import (
constants,
exceptions,
interfaces,
objects,
renderers,
symbols,
)
from volatility3.framework.configuration import requirements
from volatility3.framework.layers import scanners
from volatility3.framework.renderers import format_hints
from volatility3.framework.symbols import intermed
from volatility3.framework.symbols.windows import versions
from volatility3.framework.symbols.windows.extensions import services
from volatility3.plugins.windows import poolscanner, vadyarascan, pslist
from volatility3.plugins.windows import poolscanner, pslist, vadyarascan
from volatility3.plugins.windows.registry import hivelist

vollog = logging.getLogger(__name__)


ServiceBinaryInfo = NamedTuple(
"ServiceBinaryInfo",
[
("dll", Union[str, interfaces.renderers.BaseAbsentValue]),
("binary", Union[str, interfaces.renderers.BaseAbsentValue]),
],
)


class SvcScan(interfaces.plugins.PluginInterface):
"""Scans for windows services."""

_required_framework_version = (2, 0, 0)
_version = (1, 0, 0)
_version = (2, 0, 0)

@classmethod
def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
Expand All @@ -42,10 +59,16 @@ def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]
requirements.PluginRequirement(
name="vadyarascan", plugin=vadyarascan.VadYaraScan, version=(1, 0, 0)
),
requirements.PluginRequirement(
name="hivelist", plugin=hivelist.HiveList, version=(1, 0, 0)
),
]

@staticmethod
def get_record_tuple(service_record: interfaces.objects.ObjectInterface):
def get_record_tuple(
service_record: interfaces.objects.ObjectInterface,
binary_info: ServiceBinaryInfo,
):
return (
format_hints.Hex(service_record.vol.offset),
service_record.Order,
Expand All @@ -56,8 +79,32 @@ def get_record_tuple(service_record: interfaces.objects.ObjectInterface):
service_record.get_name(),
service_record.get_display(),
service_record.get_binary(),
binary_info.binary,
binary_info.dll,
)

# These checks must be completed from newest -> oldest OS version.
_win_version_file_map: List[Tuple[versions.OsDistinguisher, bool, str]] = [
(versions.is_win10_25398_or_later, True, "services-win10-25398-x64"),
(versions.is_win10_19041_or_later, True, "services-win10-19041-x64"),
(versions.is_win10_19041_or_later, False, "services-win10-19041-x86"),
(versions.is_win10_18362_or_later, True, "services-win10-18362-x64"),
(versions.is_win10_18362_or_later, False, "services-win10-18362-x86"),
(versions.is_win10_17763_or_later, False, "services-win10-17763-x86"),
(versions.is_win10_16299_or_later, True, "services-win10-16299-x64"),
(versions.is_win10_16299_or_later, False, "services-win10-16299-x86"),
(versions.is_win10_15063, True, "services-win10-15063-x64"),
(versions.is_win10_15063, False, "services-win10-15063-x86"),
(versions.is_win10_up_to_15063, True, "services-win8-x64"),
(versions.is_win10_up_to_15063, False, "services-win8-x86"),
(versions.is_windows_8_or_later, True, "services-win8-x64"),
(versions.is_windows_8_or_later, True, "services-win8-x86"),
(versions.is_vista_or_later, True, "services-vista-x64"),
(versions.is_vista_or_later, False, "services-vista-x86"),
(versions.is_windows_xp, False, "services-xp-x86"),
(versions.is_xp_or_2003, True, "services-xp-2003-x64"),
]

@staticmethod
def create_service_table(
context: interfaces.context.ContextInterface,
Expand All @@ -78,67 +125,14 @@ def create_service_table(
native_types = context.symbol_space[symbol_table].natives
is_64bit = symbols.symbol_table_is_64bit(context, symbol_table)

if (
versions.is_windows_xp(context=context, symbol_table=symbol_table)
and not is_64bit
):
symbol_filename = "services-xp-x86"
elif (
versions.is_xp_or_2003(context=context, symbol_table=symbol_table)
and is_64bit
):
symbol_filename = "services-xp-2003-x64"
elif (
versions.is_win10_16299_or_later(context=context, symbol_table=symbol_table)
and is_64bit
):
symbol_filename = "services-win10-16299-x64"
elif (
versions.is_win10_16299_or_later(context=context, symbol_table=symbol_table)
and not is_64bit
):
symbol_filename = "services-win10-16299-x86"
elif (
versions.is_win10_up_to_15063(context=context, symbol_table=symbol_table)
and is_64bit
):
symbol_filename = "services-win8-x64"
elif (
versions.is_win10_up_to_15063(context=context, symbol_table=symbol_table)
and not is_64bit
):
symbol_filename = "services-win8-x86"
elif (
versions.is_win10_15063(context=context, symbol_table=symbol_table)
and is_64bit
):
symbol_filename = "services-win10-15063-x64"
elif (
versions.is_win10_15063(context=context, symbol_table=symbol_table)
and not is_64bit
):
symbol_filename = "services-win10-15063-x86"
elif (
versions.is_windows_8_or_later(context=context, symbol_table=symbol_table)
and is_64bit
):
symbol_filename = "services-win8-x64"
elif (
versions.is_windows_8_or_later(context=context, symbol_table=symbol_table)
and not is_64bit
):
symbol_filename = "services-win8-x86"
elif (
versions.is_vista_or_later(context=context, symbol_table=symbol_table)
and is_64bit
):
symbol_filename = "services-vista-x64"
elif (
versions.is_vista_or_later(context=context, symbol_table=symbol_table)
and not is_64bit
):
symbol_filename = "services-vista-x86"
else:
try:
symbol_filename = next(
filename
for version_check, for_64bit, filename in SvcScan._win_version_file_map
if is_64bit == for_64bit
and version_check(context=context, symbol_table=symbol_table)
)
except StopIteration:
raise NotImplementedError("This version of Windows is not supported!")

return intermed.IntermediateSymbolTable.create(
Expand All @@ -150,13 +144,110 @@ def create_service_table(
native_types=native_types,
)

def _get_service_key(self, kernel) -> Optional[objects.StructType]:
for hive in hivelist.HiveList.list_hives(
context=self.context,
base_config_path=interfaces.configuration.path_join(
self.config_path, "hivelist"
),
layer_name=kernel.layer_name,
symbol_table=kernel.symbol_table_name,
filter_string="machine\\system",
):
# Get ControlSet\Services.
try:
return cast(
objects.StructType, hive.get_key(r"CurrentControlSet\Services")
)
except (KeyError, exceptions.InvalidAddressException):
try:
return cast(
objects.StructType, hive.get_key(r"ControlSet001\Services")
)
except (KeyError, exceptions.InvalidAddressException):
vollog.log(
constants.LOGLEVEL_VVVV,
"Could not retrieve any control set from SYSTEM hive",
)

return None

@staticmethod
def _get_service_dll(
service_key,
) -> Union[str, interfaces.renderers.BaseAbsentValue]:
try:
param_key = next(
key
for key in service_key.get_subkeys()
if key.get_name() == "Parameters"
)
return (
next(
val
for val in param_key.get_values()
if val.get_name() == "ServiceDll"
)
.decode_data()
.decode("utf-16")
.rstrip("\x00")
)

except UnicodeDecodeError:
return renderers.UnparsableValue()
except StopIteration:
return renderers.UnreadableValue()

@staticmethod
def _get_service_binary(
service_key,
) -> Union[str, interfaces.renderers.BaseAbsentValue]:
try:
return (
next(
val
for val in service_key.get_values()
if val.get_name() == "ImagePath"
)
.decode_data()
.decode("utf-16")
.rstrip("\x00")
)

except UnicodeDecodeError:
return renderers.UnparsableValue()
except StopIteration:
return renderers.UnreadableValue()

@staticmethod
def _get_service_binary_map(
services_key: interfaces.objects.ObjectInterface,
) -> Dict[str, ServiceBinaryInfo]:
services = services_key.get_subkeys()
return {
service_key.get_name(): ServiceBinaryInfo(
SvcScan._get_service_dll(service_key),
SvcScan._get_service_binary(service_key),
)
for service_key in services
}

def _generator(self):
kernel = self.context.modules[self.config["kernel"]]

service_table_name = self.create_service_table(
self.context, kernel.symbol_table_name, self.config_path
)

# Building the dictionary ahead of time is much better for performance
# vs looking up each service's DLL individually.
services_key = self._get_service_key(kernel)
service_binary_dll_map = (
self._get_service_binary_map(services_key)
if services_key is not None
else {}
)

relative_tag_offset = self.context.symbol_space.get_type(
service_table_name + constants.BANG + "_SERVICE_RECORD"
).relative_child_offset("Tag")
Expand Down Expand Up @@ -209,7 +300,16 @@ def _generator(self):
if not service_record.is_valid():
continue

yield (0, self.get_record_tuple(service_record))
service_info = service_binary_dll_map.get(
service_record.get_name(),
ServiceBinaryInfo(
renderers.UnreadableValue(), renderers.UnreadableValue()
),
)
yield (
0,
self.get_record_tuple(service_record, service_info),
)
else:
service_header = self.context.object(
service_table_name + constants.BANG + "_SERVICE_HEADER",
Expand All @@ -227,7 +327,16 @@ def _generator(self):
if service_record in seen:
break
seen.append(service_record)
yield (0, self.get_record_tuple(service_record))
service_info = service_binary_dll_map.get(
service_record.get_name(),
ServiceBinaryInfo(
renderers.UnreadableValue(), renderers.UnreadableValue()
),
)
yield (
0,
self.get_record_tuple(service_record, service_info),
)

def run(self):
return renderers.TreeGrid(
Expand All @@ -241,6 +350,8 @@ def run(self):
("Name", str),
("Display", str),
("Binary", str),
("Binary (Registry)", str),
("Dll", str),
],
self._generator(),
)
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