mirror of
https://github.com/volatilityfoundation/volatility3.git
synced 2026-09-11 04:07:39 +02:00
Mike Auty
6fc12e9b01
So this feels like a contentious decision. It'd be awesome to have the options for the methods stored along-side the methods themselves. The downside with this is that the thing accessing the configuration data is always the plugin, so it's the plugin that must have requested the configuration option. This is also important in case the description of the configuration option needs modifying for clarity or providing context for how it will be used. If the interface changes, all plugins calling the plugin methods will need updating, so the config options can be updated if necessary.
103 lines
4.8 KiB
Python
103 lines
4.8 KiB
Python
# This file was contributed to the Volatility Framework Version 3.
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# Copyright (C) 2018 Volatility Foundation.
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#
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# THE LICENSED WORK IS PROVIDED UNDER THE TERMS OF THE Volatility Contributors
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# Public License V1.0("LICENSE") AS FIRST COMPLETED BY: Volatility Foundation,
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# Inc. ANY USE, PUBLIC DISPLAY, PUBLIC PERFORMANCE, REPRODUCTION OR DISTRIBUTION
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# OF, OR PREPARATION OF SUBSEQUENT WORKS, DERIVATIVE WORKS OR DERIVED WORKS BASED
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# ON, THE LICENSED WORK CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS LICENSE AND ITS
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# TERMS, WHETHER OR NOT SUCH RECIPIENT READS THE TERMS OF THE LICENSE. "LICENSED
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# WORK,” “RECIPIENT" AND “DISTRIBUTOR" ARE DEFINED IN THE LICENSE. A COPY OF THE
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# LICENSE IS LOCATED IN THE TEXT FILE ENTITLED "LICENSE.txt" ACCOMPANYING THE
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# CONTENTS OF THIS FILE. IF A COPY OF THE LICENSE DOES NOT ACCOMPANY THIS FILE, A
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# COPY OF THE LICENSE MAY ALSO BE OBTAINED AT THE FOLLOWING WEB SITE:
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# https://www.volatilityfoundation.org/license/vcpl_v1.0
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#
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# Software distributed under the License is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
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# specific language governing rights and limitations under the License.
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#
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import logging
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from typing import Iterable, List, Tuple
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from volatility.framework import interfaces, renderers
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from volatility.framework.configuration import requirements
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from volatility.framework.layers import resources
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from volatility.framework.renderers import format_hints
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from volatility.plugins import yarascan
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from volatility.plugins.windows import pslist
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vollog = logging.getLogger(__name__)
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try:
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import yara
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except ImportError:
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vollog.info("Python Yara module not found, plugin (and dependent plugins) not available")
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class VadYaraScan(interfaces.plugins.PluginInterface):
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@classmethod
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def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
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return [
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requirements.TranslationLayerRequirement(
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name = 'primary', description = "Memory layer for the kernel", architectures = ["Intel32", "Intel64"]),
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requirements.SymbolTableRequirement(name = "nt_symbols", description = "Windows kernel symbols"),
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requirements.BooleanRequirement(
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name = "wide", description = "Match wide (unicode) strings", default = False, optional = True),
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requirements.StringRequirement(
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name = "yara_rules", description = "Yara rules (as a string)", optional = True),
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requirements.URIRequirement(name = "yara_file", description = "Yara rules (as a file)", optional = True),
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requirements.IntRequirement(
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name = "max_size",
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default = 0x40000000,
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description = "Set the maximum size (default is 1GB)",
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optional = True),
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requirements.IntRequirement(
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name = 'pid', description = "Process ID to include (all other processes are excluded)", optional = True)
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]
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def _generator(self):
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layer = self.context.layers[self.config['primary']]
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rules = None
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if self.config.get('yara_rules', None) is not None:
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rule = self.config['yara_rules']
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if rule[0] not in ["{", "/"]:
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rule = '"{}"'.format(rule)
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if self.config.get('case', False):
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rule += " nocase"
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if self.config.get('wide', False):
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rule += " wide ascii"
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rules = yara.compile(sources = {'n': 'rule r1 {{strings: $a = {} condition: $a}}'.format(rule)})
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elif self.config.get('yara_file', None) is not None:
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rules = yara.compile(file = resources.ResourceAccessor().open(self.config['yara_file'], "rb"))
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else:
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vollog.error("No yara rules, nor yara rules file were specified")
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filter_func = pslist.PsList.create_pid_filter([self.config.get('pid', None)])
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for task in pslist.PsList.list_processes(
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context = self.context,
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layer_name = self.config['primary'],
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symbol_table = self.config['nt_symbols'],
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filter_func = filter_func):
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for offset, name in layer.scan(
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context = self.context,
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scanner = yarascan.YaraScanner(rules = rules),
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sections = self.get_vad_maps(task)):
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yield format_hints.Hex(offset), name
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@staticmethod
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def get_vad_maps(task: interfaces.objects.ObjectInterface) -> Iterable[Tuple[int, int]]:
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vad_root = task.get_vad_root()
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for vad in vad_root.traverse():
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end = vad.get_end()
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start = vad.get_start()
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yield (start, end - start)
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def run(self):
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return renderers.TreeGrid([('Offset', format_hints.Hex), ('Rule', str)], self._generator())
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