mirror of
https://github.com/volatilityfoundation/volatility3.git
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193 lines
9.5 KiB
Python
193 lines
9.5 KiB
Python
# This file is Copyright 2019 Volatility Foundation and licensed under the Volatility Software License 1.0
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# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
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#
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import datetime
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import logging
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from typing import Iterable, Callable, Tuple
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from volatility.framework import renderers, interfaces
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from volatility.framework.configuration import requirements
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from volatility.framework.renderers import format_hints
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from volatility.framework.symbols import intermed
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from volatility.framework.symbols.windows.extensions import pe
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from volatility.plugins import timeliner
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from volatility.plugins.windows import info
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from volatility.plugins.windows import poolscanner
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from volatility.plugins.windows import pslist
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vollog = logging.getLogger(__name__)
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class PsScan(interfaces.plugins.PluginInterface, timeliner.TimeLinerInterface):
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"""Scans for processes present in a particular windows memory image."""
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_required_framework_version = (2, 0, 0)
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_version = (1, 1, 0)
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@classmethod
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def get_requirements(cls):
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return [
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requirements.TranslationLayerRequirement(name = 'primary',
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description = 'Memory layer for the kernel',
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architectures = ["Intel32", "Intel64"]),
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requirements.SymbolTableRequirement(name = "nt_symbols", description = "Windows kernel symbols"),
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requirements.PluginRequirement(name = 'pslist', plugin = pslist.PsList, version = (2, 0, 0)),
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requirements.VersionRequirement(name = 'info', component = info.Info, version = (1, 0, 0)),
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requirements.ListRequirement(name = 'pid',
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element_type = int,
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description = "Process ID to include (all other processes are excluded)",
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optional = True),
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requirements.BooleanRequirement(name = 'dump',
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description = "Extract listed processes",
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default = False,
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optional = True)
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]
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@classmethod
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def scan_processes(cls,
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context: interfaces.context.ContextInterface,
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layer_name: str,
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symbol_table: str,
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filter_func: Callable[[interfaces.objects.ObjectInterface], bool] = lambda _: False) -> \
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Iterable[interfaces.objects.ObjectInterface]:
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"""Scans for processes using the poolscanner module and constraints.
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Args:
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context: The context to retrieve required elements (layers, symbol tables) from
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layer_name: The name of the layer on which to operate
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symbol_table: The name of the table containing the kernel symbols
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Returns:
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A list of processes found by scanning the `layer_name` layer for process pool signatures
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"""
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constraints = poolscanner.PoolScanner.builtin_constraints(symbol_table, [b'Pro\xe3', b'Proc'])
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for result in poolscanner.PoolScanner.generate_pool_scan(context, layer_name, symbol_table, constraints):
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_constraint, mem_object, _header = result
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if not filter_func(mem_object):
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yield mem_object
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@classmethod
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def virtual_process_from_physical(cls,
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context: interfaces.context.ContextInterface,
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layer_name: str,
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symbol_table: str,
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proc: interfaces.objects.ObjectInterface) -> \
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Iterable[interfaces.objects.ObjectInterface]:
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""" Returns a virtual process from a physical addressed one
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Args:
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context: The context to retrieve required elements (layers, symbol tables) from
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layer_name: The name of the layer on which to operate
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symbol_table: The name of the table containing the kernel symbols
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proc: the process object with phisical address
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Returns:
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A process object on virtual address layer
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"""
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version = cls.get_osversion(context, layer_name, symbol_table)
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# If it's WinXP->8.1 we have now a physical process address.
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# We'll use the first thread to bounce back to the virtual process
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kvo = context.layers[layer_name].config['kernel_virtual_offset']
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ntkrnlmp = context.module(symbol_table, layer_name = layer_name, offset = kvo)
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tleoffset = ntkrnlmp.get_type("_ETHREAD").relative_child_offset("ThreadListEntry")
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# Start out with the member offset
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offsets = [tleoffset]
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# If (and only if) we're dealing with 64-bit Windows 7 SP1
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# then add the other commonly seen member offset to the list
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bits = context.layers[layer_name].bits_per_register
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if version == (6, 1, 7601) and bits == 64:
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offsets.append(tleoffset + 8)
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# Now we can try to bounce back
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for ofs in offsets:
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ethread = ntkrnlmp.object(object_type = "_ETHREAD",
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offset = proc.ThreadListHead.Flink - ofs,
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absolute = True)
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# Ask for the thread's process to get an _EPROCESS with a virtual address layer
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virtual_process = ethread.owning_process()
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# Sanity check the bounce.
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# This compares the original offset with the new one (translated from virtual layer)
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(_, _, ph_offset, _, _) = list(context.layers[layer_name].mapping(offset = virtual_process.vol.offset,
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length = 0))[0]
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if virtual_process and \
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proc.vol.offset == ph_offset:
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return virtual_process
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@classmethod
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def get_osversion(cls,
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context: interfaces.context.ContextInterface,
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layer_name: str,
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symbol_table: str) -> Tuple[int, int, int]:
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"""Returns the complete OS version (MAJ,MIN,BUILD)
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Args:
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context: The context to retrieve required elements (layers, symbol tables) from
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layer_name: The name of the layer on which to operate
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symbol_table: The name of the table containing the kernel symbols
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Returns:
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A tuple with (MAJ,MIN,BUILD)
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"""
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kuser = info.Info.get_kuser_structure(context, layer_name, symbol_table)
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nt_major_version = int(kuser.NtMajorVersion)
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nt_minor_version = int(kuser.NtMinorVersion)
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vers = info.Info.get_version_structure(context, layer_name, symbol_table)
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build = vers.MinorVersion
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return (nt_major_version, nt_minor_version, build)
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def _generator(self):
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pe_table_name = intermed.IntermediateSymbolTable.create(self.context,
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self.config_path,
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"windows",
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"pe",
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class_types = pe.class_types)
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for proc in self.scan_processes(self.context,
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self.config['primary'],
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self.config['nt_symbols'],
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filter_func = pslist.PsList.create_pid_filter(self.config.get('pid', None))):
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file_output = "Disabled"
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if self.config['dump']:
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# windows 10 objects (maybe others in the future) are already in virtual memory
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if proc.vol.layer_name == self.config['primary']:
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vproc = proc
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else:
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vproc = self.virtual_process_from_physical(self.context, self.config['primary'],
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self.config['nt_symbols'], proc)
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file_handle = pslist.PsList.process_dump(self.context, self.config['nt_symbols'], pe_table_name,
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vproc, self.open)
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file_output = "Error outputting file"
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if file_handle:
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file_output = file_handle.preferred_filename
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yield (0, (proc.UniqueProcessId, proc.InheritedFromUniqueProcessId,
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proc.ImageFileName.cast("string", max_length = proc.ImageFileName.vol.count,
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errors = 'replace'), format_hints.Hex(proc.vol.offset),
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proc.ActiveThreads, proc.get_handle_count(), proc.get_session_id(), proc.get_is_wow64(),
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proc.get_create_time(), proc.get_exit_time(), file_output))
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def generate_timeline(self):
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for row in self._generator():
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_depth, row_data = row
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description = "Process: {} {} ({})".format(row_data[0], row_data[2], row_data[3])
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yield (description, timeliner.TimeLinerType.CREATED, row_data[8])
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yield (description, timeliner.TimeLinerType.MODIFIED, row_data[9])
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def run(self):
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return renderers.TreeGrid([("PID", int), ("PPID", int), ("ImageFileName", str), ("Offset", format_hints.Hex),
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("Threads", int), ("Handles", int), ("SessionId", int), ("Wow64", bool),
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("CreateTime", datetime.datetime), ("ExitTime", datetime.datetime),
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("File output", str)], self._generator())
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