mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
mike.auty@gmail.com
196 lines
7.4 KiB
Python
196 lines
7.4 KiB
Python
# Volatility
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# Copyright (C) 2008 Volatile Systems
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# Copyright (c) 2008 Brendan Dolan-Gavitt <bdolangavitt@wesleyan.edu>
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#
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# This program 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 (at
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# your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# 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 this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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This module implements the fast module scanning
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@author: AAron Walters and Brendan Dolan-Gavitt
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@license: GNU General Public License 2.0 or later
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@contact: awalters@volatilesystems.com,bdolangavitt@wesleyan.edu
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@organization: Volatile Systems
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"""
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#pylint: disable-msg=C0111
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import common
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import volatility.plugins.filescan as filescan
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import volatility.scan as scan
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import volatility.utils as utils
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import volatility.obj as obj
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import volatility.debug as debug #pylint: disable-msg=W0611
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class PoolScanModuleFast(scan.PoolScanner):
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def object_offset(self, found, address_space):
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return found + (address_space.profile.get_obj_size("_POOL_HEADER") -
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address_space.profile.get_obj_offset("_POOL_HEADER", "PoolTag"))
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checks = [ ('PoolTagCheck', dict(tag = 'MmLd')),
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('CheckPoolSize', dict(condition = lambda x: x > 0x4c)),
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('CheckPoolType', dict(paged = True, non_paged = True, free = True)),
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('CheckPoolIndex', dict(value = 0)),
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]
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class ModScan(filescan.FileScan):
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""" Scan Physical memory for _LDR_DATA_TABLE_ENTRY objects
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"""
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# Declare meta information associated with this plugin
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meta_info = dict(
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author = 'Brendan Dolan-Gavitt',
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copyright = 'Copyright (c) 2007,2008 Brendan Dolan-Gavitt',
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contact = 'bdolangavitt@wesleyan.edu',
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license = 'GNU General Public License 2.0 or later',
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url = 'http://moyix.blogspot.com/',
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os = 'WIN_32_XP_SP2',
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version = '1.0',
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)
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def calculate(self):
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## Here we scan the physical address space
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address_space = utils.load_as(self._config, astype = 'physical')
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## We need the kernel_address_space later
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kernel_as = utils.load_as(self._config)
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scanner = PoolScanModuleFast()
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for offset in scanner.scan(address_space):
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ldr_entry = obj.Object('_LDR_DATA_TABLE_ENTRY', vm = address_space,
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offset = offset, native_vm = kernel_as)
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yield ldr_entry
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def render_text(self, outfd, data):
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self.table_header(outfd,
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[("Offset(P)", "[addrpad]"),
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('Name', "20"),
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('Base', "[addrpad]"),
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('Size', "[addr]"),
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('File', "")
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])
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for ldr_entry in data:
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self.table_row(outfd,
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ldr_entry.obj_offset,
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str(ldr_entry.BaseDllName or ''),
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ldr_entry.DllBase,
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ldr_entry.SizeOfImage,
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str(ldr_entry.FullDllName or ''))
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class CheckThreads(scan.ScannerCheck):
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""" Check sanity of _ETHREAD """
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kernel = 0x80000000
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def check(self, found):
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pool_base = found - self.address_space.profile.get_obj_offset(
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'_POOL_HEADER', 'PoolTag')
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pool_obj = obj.Object("_POOL_HEADER", vm = self.address_space,
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offset = pool_base)
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## We work out the _ETHREAD from the end of the
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## allocation (bottom up).
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pool_alignment = obj.VolMagic(self.address_space).PoolAlignment.v()
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thread = obj.Object("_ETHREAD", vm = self.address_space,
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offset = pool_base + pool_obj.BlockSize * pool_alignment -
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common.pool_align(self.address_space, '_ETHREAD', pool_alignment))
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#if (thread.Cid.UniqueProcess.v() != 0 and
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# thread.ThreadsProcess.v() <= self.kernel):
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# return False
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## check the start address
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if thread.Cid.UniqueProcess.v() != 0 and thread.StartAddress == 0:
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return False
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## Check the Semaphores
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if (thread.Tcb.SuspendSemaphore.Header.Size != 0x05 and
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thread.Tcb.SuspendSemaphore.Header.Type != 0x05):
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return False
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if (thread.KeyedWaitSemaphore.Header.Size != 0x05 and
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thread.KeyedWaitSemaphore.Header.Type != 0x05):
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return False
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return True
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class PoolScanThreadFast(scan.PoolScanner):
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""" Carve out thread objects using the pool tag """
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def object_offset(self, found, address_space):
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""" This returns the offset of the object contained within
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this pool allocation.
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"""
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## The offset of the object is determined by subtracting the offset
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## of the PoolTag member to get the start of Pool Object
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pool_base = found - self.buffer.profile.get_obj_offset('_POOL_HEADER', 'PoolTag')
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pool_obj = obj.Object("_POOL_HEADER", vm = address_space,
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offset = pool_base)
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## We work out the _ETHREAD from the end of the
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## allocation (bottom up).
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pool_alignment = obj.VolMagic(address_space).PoolAlignment.v()
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object_base = (pool_base + pool_obj.BlockSize * pool_alignment -
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common.pool_align(address_space, '_ETHREAD', pool_alignment))
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return object_base
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checks = [ ('PoolTagCheck', dict(tag = '\x54\x68\x72\xe5')),
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('CheckPoolSize', dict(condition = lambda x: x >= 0x278)),
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('CheckPoolType', dict(paged = True, non_paged = True, free = True)),
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('CheckPoolIndex', dict(value = 0)),
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('CheckThreads', {}),
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]
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class ThrdScan(ModScan):
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"""Scan physical memory for _ETHREAD objects"""
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def calculate(self):
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## Here we scan the physical address space
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address_space = utils.load_as(self._config, astype = 'physical')
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kernel_as = utils.load_as(self._config)
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scanner = PoolScanThreadFast()
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for found in scanner.scan(address_space):
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thread = obj.Object('_ETHREAD', vm = address_space,
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native_vm = kernel_as, offset = found)
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yield thread
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def render_text(self, outfd, data):
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self.table_header(outfd,
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[("Offset(P)", "[addrpad]"),
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("PID", ">6"),
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("TID", ">6"),
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("Start Address", "[addr]"),
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("Create Time", "25"),
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("Exit Time", "25"),
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])
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for thread in data:
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self.table_row(outfd, thread.obj_offset,
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thread.Cid.UniqueProcess,
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thread.Cid.UniqueThread,
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thread.StartAddress,
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thread.CreateTime or '',
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thread.ExitTime or '',
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)
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