mirror of
https://github.com/volatilityfoundation/volatility3.git
synced 2026-08-21 22:12:23 +02:00
98 lines
3.7 KiB
Python
98 lines
3.7 KiB
Python
# This file is Copyright 2020 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 volatility.framework import interfaces, renderers, contexts, symbols
|
|
from volatility.framework.configuration import requirements
|
|
from volatility.framework.renderers import format_hints
|
|
from volatility.framework.symbols import linux
|
|
from volatility.plugins.linux import lsmod
|
|
|
|
vollog = logging.getLogger(__name__)
|
|
|
|
|
|
class Check_idt(interfaces.plugins.PluginInterface):
|
|
""" Checks if the IDT has been altered """
|
|
|
|
_required_framework_version = (2, 0, 0)
|
|
|
|
@classmethod
|
|
def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
|
|
return [
|
|
requirements.TranslationLayerRequirement(name = 'primary',
|
|
description = 'Memory layer for the kernel',
|
|
architectures = ["Intel32", "Intel64"]),
|
|
requirements.SymbolTableRequirement(name = "vmlinux", description = "Linux kernel symbols"),
|
|
requirements.VersionRequirement(name = 'linuxutils', component = linux.LinuxUtilities, version = (1, 0, 0)),
|
|
requirements.PluginRequirement(name = 'lsmod', plugin = lsmod.Lsmod, version = (1, 0, 0))
|
|
]
|
|
|
|
def _generator(self):
|
|
vmlinux = contexts.Module(self.context, self.config['vmlinux'], self.config['primary'], 0)
|
|
|
|
modules = lsmod.Lsmod.list_modules(self.context, self.config['primary'], self.config['vmlinux'])
|
|
|
|
handlers = linux.LinuxUtilities.generate_kernel_handler_info(self.context, self.config['primary'],
|
|
self.config['vmlinux'], modules)
|
|
|
|
is_32bit = not symbols.symbol_table_is_64bit(self.context, self.config["vmlinux"])
|
|
|
|
idt_table_size = 256
|
|
|
|
address_mask = self.context.layers[self.config['primary']].address_mask
|
|
|
|
# hw handlers + system call
|
|
check_idxs = list(range(0, 20)) + [128]
|
|
|
|
if is_32bit:
|
|
if vmlinux.has_type("gate_struct"):
|
|
idt_type = "gate_struct"
|
|
else:
|
|
idt_type = "desc_struct"
|
|
else:
|
|
if vmlinux.has_type("gate_struct64"):
|
|
idt_type = "gate_struct64"
|
|
elif vmlinux.has_type("gate_struct"):
|
|
idt_type = "gate_struct"
|
|
else:
|
|
idt_type = "idt_desc"
|
|
|
|
addrs = vmlinux.object_from_symbol("idt_table")
|
|
|
|
table = vmlinux.object(object_type = 'array',
|
|
offset = addrs.vol.offset,
|
|
subtype = vmlinux.get_type(idt_type),
|
|
count = idt_table_size)
|
|
|
|
for i in check_idxs:
|
|
ent = table[i]
|
|
|
|
if not ent:
|
|
continue
|
|
|
|
if hasattr(ent, "Address"):
|
|
idt_addr = ent.Address
|
|
else:
|
|
low = ent.offset_low
|
|
middle = ent.offset_middle
|
|
|
|
if hasattr(ent, "offset_high"):
|
|
high = ent.offset_high
|
|
else:
|
|
high = 0
|
|
|
|
idt_addr = (high << 32) | (middle << 16) | low
|
|
|
|
idt_addr = idt_addr & address_mask
|
|
|
|
module_name, symbol_name = linux.LinuxUtilities.lookup_module_address(self.context, handlers, idt_addr)
|
|
|
|
yield (0, [format_hints.Hex(i), format_hints.Hex(idt_addr), module_name, symbol_name])
|
|
|
|
def run(self):
|
|
return renderers.TreeGrid([("Index", format_hints.Hex), ("Address", format_hints.Hex), ("Module", str),
|
|
("Symbol", str)], self._generator())
|