mirror of
https://github.com/volatilityfoundation/volatility3.git
synced 2026-09-27 20:14:51 +02:00
Mike Auty
18283ab410
Note: creation of enumerations can be done using Context.object, which should allow reference of enumeration members by normal type objects. If it turns out enumerations are never referenced from types, we can easily remove the try/except in the Module.object method.
103 lines
4.6 KiB
Python
103 lines
4.6 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 List, Iterator, Any
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from volatility.framework import exceptions, interfaces
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from volatility.framework import renderers, contexts
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from volatility.framework.automagic import mac
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from volatility.framework.configuration import requirements
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from volatility.framework.interfaces import plugins
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from volatility.framework.objects import utility
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from volatility.framework.renderers import format_hints
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from volatility.plugins.mac import lsmod
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vollog = logging.getLogger(__name__)
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class Check_syscall(plugins.PluginInterface):
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"""Check system call table for hooks"""
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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 = "darwin", description = "Mac kernel symbols")
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]
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def _generator(self, mods: Iterator[Any]):
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mac.MacUtilities.aslr_mask_symbol_table(self.context, self.config['darwin'], self.config['primary'])
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kernel = contexts.Module(self._context, self.config['darwin'], self.config['primary'], 0)
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policy_list = kernel.object_from_symbol(symbol = "_mac_policy_list").cast("mac_policy_list")
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entries = kernel.object(
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symbol = "array",
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offset = policy_list.entries.dereference().vol.offset,
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subtype = kernel.get_type('mac_policy_list_element'),
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count = policy_list.staticmax + 1)
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mask = self.context.layers[self.config['primary']].address_mask
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mods_list = [(mod.name, mod.address & mask, (mod.address & mask) + mod.size) for mod in mods]
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for i, ent in enumerate(entries):
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# I don't know how this can happen, but the kernel makes this check all over the place
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# the policy isn't useful without any ops so a rootkit can't abuse this
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try:
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mpc = ent.mpc.dereference()
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ops = mpc.mpc_ops.dereference()
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except exceptions.PagedInvalidAddressException:
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continue
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try:
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ent_name = utility.pointer_to_string(mpc.mpc_name, 255)
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except exceptions.PagedInvalidAddressException:
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ent_name = "N/A"
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for check in ops.vol.members:
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call_addr = getattr(ops, check)
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if call_addr is None or call_addr == 0:
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continue
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found_module = None
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for mod_name_info, mod_base, mod_end in mods_list:
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if call_addr >= mod_base and call_addr <= mod_end:
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found_module = mod_name_info
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break
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if found_module:
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symbol_module = utility.array_to_string(found_module)
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else:
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symbol_module = "UNKNOWN"
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yield (0, (check, ent_name, symbol_module, format_hints.Hex(call_addr)))
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def run(self):
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return renderers.TreeGrid([("Member", str), ("Policy Name", str), ("Handler Module", str),
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("Handler Address", format_hints.Hex)],
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self._generator(
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lsmod.Lsmod.list_modules(self.context, self.config['primary'],
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self.config['darwin'])))
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