# 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 logging
from typing import List
from volatility3.framework import exceptions, interfaces
from volatility3.framework import renderers
from volatility3.framework.configuration import requirements
from volatility3.framework.interfaces import plugins
from volatility3.framework.renderers import format_hints
from volatility3.framework.symbols import mac
from volatility3.plugins.mac import lsmod
vollog = logging.getLogger(__name__)
[docs]class Check_trap_table(plugins.PluginInterface):
"""Check mach trap table for hooks."""
_required_framework_version = (2, 0, 0)
[docs] @classmethod
def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
return [
requirements.ModuleRequirement(
name="kernel",
description="Kernel module for the OS",
architectures=["Intel32", "Intel64"],
),
requirements.PluginRequirement(
name="lsmod", plugin=lsmod.Lsmod, version=(2, 0, 0)
),
requirements.VersionRequirement(
name="macutils", component=mac.MacUtilities, version=(1, 0, 0)
),
]
def _generator(self):
kernel = self.context.modules[self.config["kernel"]]
mods = lsmod.Lsmod.list_modules(self.context, self.config["kernel"])
handlers = mac.MacUtilities.generate_kernel_handler_info(
self.context, kernel.layer_name, kernel, mods
)
table = kernel.object_from_symbol(symbol_name="mach_trap_table")
for i, ent in enumerate(table):
try:
call_addr = ent.mach_trap_function.dereference().vol.offset
except exceptions.InvalidAddressException:
continue
if not call_addr or call_addr == 0:
continue
module_name, symbol_name = mac.MacUtilities.lookup_module_address(
self.context, handlers, call_addr, self.config["kernel"]
)
yield (
0,
(
format_hints.Hex(table.vol.offset),
"TrapTable",
i,
format_hints.Hex(call_addr),
module_name,
symbol_name,
),
)
[docs] def run(self):
return renderers.TreeGrid(
[
("Table Address", format_hints.Hex),
("Table Name", str),
("Index", int),
("Handler Address", format_hints.Hex),
("Handler Module", str),
("Handler Symbol", str),
],
self._generator(),
)