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64 lines
2.6 KiB
Python
64 lines
2.6 KiB
Python
# This file is Copyright 2019 Volatility Foundation and licensed under the Volatility Software License 1.0
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# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
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#
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import logging
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from typing import List
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from volatility.framework import exceptions, interfaces
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from volatility.framework import renderers, constants, 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.renderers import format_hints
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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(name = 'primary',
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description = 'Memory layer for the kernel',
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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):
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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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nsysent = kernel.object_from_symbol(symbol_name = "nsysent")
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table = kernel.object_from_symbol(symbol_name = "sysent")
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# smear help
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num_ents = min(nsysent, table.count)
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if num_ents > 1024:
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num_ents = 1024
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for (i, ent) in enumerate(table):
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try:
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call_addr = ent.sy_call.dereference().vol.offset
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except exceptions.InvalidPagedAddressException:
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continue
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if not call_addr or call_addr == 0:
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continue
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symbols = list(self.context.symbol_space.get_symbols_by_location(call_addr))
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if len(symbols) > 0:
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sym_name = str(symbols[0].split(constants.BANG)[1]) if constants.BANG in symbols[0] else \
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str(symbols[0])
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else:
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sym_name = "UNKNOWN"
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yield (0, (format_hints.Hex(table.vol.offset), "SysCall", i, format_hints.Hex(call_addr), sym_name))
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def run(self):
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return renderers.TreeGrid([("Table Address", format_hints.Hex), ("Table Name", str), ("Index", int),
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("Handler Address", format_hints.Hex), ("Handler Symbol", str)], self._generator())
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