# This file is Copyright 2019 Volatility Foundation and licensed under the Volatility Software License 1.0
# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
#
import datetime
from typing import Iterable
from volatility3.framework import renderers, exceptions, interfaces
from volatility3.framework.configuration import requirements
from volatility3.framework.renderers import format_hints
from volatility3.plugins import timeliner
from volatility3.plugins.windows import poolscanner
[docs]
class SymlinkScan(interfaces.plugins.PluginInterface, timeliner.TimeLinerInterface):
"""Scans for links present in a particular windows memory image."""
_required_framework_version = (2, 0, 0)
[docs]
@classmethod
def get_requirements(cls):
return [
requirements.ModuleRequirement(
name="kernel",
description="Windows kernel",
architectures=["Intel32", "Intel64"],
),
]
[docs]
@classmethod
def scan_symlinks(
cls,
context: interfaces.context.ContextInterface,
layer_name: str,
symbol_table: str,
) -> Iterable[interfaces.objects.ObjectInterface]:
"""Scans for links using the poolscanner module and constraints.
Args:
context: The context to retrieve required elements (layers, symbol tables) from
layer_name: The name of the layer on which to operate
symbol_table: The name of the table containing the kernel symbols
Returns:
A list of symlink objects found by scanning memory for the Symlink pool signatures
"""
constraints = poolscanner.PoolScanner.builtin_constraints(
symbol_table, [b"Sym\xe2", b"Symb"]
)
for result in poolscanner.PoolScanner.generate_pool_scan(
context, layer_name, symbol_table, constraints
):
_constraint, mem_object, _header = result
yield mem_object
def _generator(self):
kernel = self.context.modules[self.config["kernel"]]
for link in self.scan_symlinks(
self.context, kernel.layer_name, kernel.symbol_table_name
):
try:
from_name = link.get_link_name()
except (ValueError, exceptions.InvalidAddressException):
continue
try:
to_name = link.LinkTarget.String
except exceptions.InvalidAddressException:
continue
yield (
0,
(
format_hints.Hex(link.vol.offset),
link.get_create_time(),
from_name,
to_name,
),
)
[docs]
def generate_timeline(self):
for row in self._generator():
_depth, row_data = row
description = f"Symlink: {row_data[2]} -> {row_data[3]}"
yield (description, timeliner.TimeLinerType.CREATED, row_data[1])
[docs]
def run(self):
return renderers.TreeGrid(
[
("Offset", format_hints.Hex),
("CreateTime", datetime.datetime),
("From Name", str),
("To Name", str),
],
self._generator(),
)