mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
atcuno
126 lines
4.1 KiB
Python
126 lines
4.1 KiB
Python
# Volatility
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# Copyright (C) 2007-2013 Volatility Foundation
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#
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# This file is part of Volatility.
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#
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# Volatility is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Volatility is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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@author: Andrew Case
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@license: GNU General Public License 2.0
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@contact: atcuno@gmail.com
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@organization:
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"""
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import volatility.obj as obj
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import common
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from volatility.renderers import TreeGrid
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from volatility.renderers.basic import Address
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class mac_check_syscalls(common.AbstractMacCommand):
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""" Checks to see if system call table entries are hooked """
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def __init__(self, config, *args, **kwargs):
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common.AbstractMacCommand.__init__(self, config, *args, **kwargs)
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self._config.add_option('syscall-indexes', short_option = 'i', default = None, help = 'Path to unistd_{32,64}.h from the target machine', action = 'store', type = 'str')
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def _parse_handler_names(self):
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index_names = {}
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lines = open(self._config.SYSCALL_INDEXES, "r").readlines()
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for line in lines:
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ents = line.split()
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if len(ents) < 6:
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continue
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if ents[3] != "{":
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continue
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name = ents[5].split("(")[0]
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try:
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index_names[int(ents[0])] = name
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except ValueError:
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pass
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return index_names
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def calculate(self):
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common.set_plugin_members(self)
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if self._config.SYSCALL_INDEXES:
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index_names = self._parse_handler_names()
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else:
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index_names = None
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sym_addrs = self.profile.get_all_addresses()
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table_addr = self.addr_space.profile.get_symbol("_sysent")
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nsysent = obj.Object("int", offset = self.addr_space.profile.get_symbol("_nsysent"), vm = self.addr_space)
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if nsysent == None or nsysent == 0:
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return
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sysents = obj.Object(theType = "Array", offset = table_addr, vm = self.addr_space, count = nsysent, targetType = "sysent")
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if sysents == None:
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return
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for (i, sysent) in enumerate(sysents):
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ent_addr = sysent.sy_call.v()
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hooked = ent_addr not in sym_addrs
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if index_names:
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sym_name = index_names[i]
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else:
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sym_name = self.profile.get_symbol_by_address("kernel", ent_addr)
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if not sym_name:
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sym_name = "N/A"
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yield (table_addr, "SyscallTable", i, ent_addr, sym_name, hooked)
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def unified_output(self, data):
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return TreeGrid([("Table Name", str),
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("Index", int),
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("Address", Address),
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("Symbol", str),
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("Status", str),
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], self.generator(data))
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def generator(self, data):
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for (_, table_name, i, call_addr, sym_name, hooked) in data:
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status = "OK"
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if hooked:
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status = "HOOKED"
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yield(0, [
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str(table_name),
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int(i),
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Address(call_addr),
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str(sym_name),
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str(status),
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])
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def render_text(self, outfd, data):
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self.table_header(outfd, [("Table Name", "15"), ("Index", "6"), ("Address", "[addrpad]"), ("Symbol", "<30"), ("Status", "")])
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for (_, table_name, i, call_addr, sym_name, hooked) in data:
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status = "OK"
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if hooked:
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status = "HOOKED"
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self.table_row(outfd, table_name, i, call_addr, sym_name, status)
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