mirror of
https://github.com/volatilityfoundation/volatility
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iMHLv2
213 lines
8.6 KiB
Python
213 lines
8.6 KiB
Python
# Volatility
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# Copyright (c) 2010, 2011, 2012 Michael Ligh <michael.ligh@mnin.org>
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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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import volatility.utils as utils
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import volatility.obj as obj
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import volatility.plugins.common as common
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import volatility.win32.tasks as tasks
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import volatility.plugins.modscan as modscan
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import volatility.plugins.filescan as filescan
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import volatility.plugins.overlays.windows.windows as windows
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import volatility.plugins.gui.sessions as sessions
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import volatility.plugins.gui.windowstations as windowstations
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#--------------------------------------------------------------------------------
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# object classes
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#--------------------------------------------------------------------------------
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class _PSP_CID_TABLE(windows._HANDLE_TABLE): #pylint: disable-msg=W0212
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"""Subclass the Windows handle table object for parsing PspCidTable"""
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def get_item(self, entry, handle_value = 0):
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p = obj.Object("address", entry.Object.v(), self.obj_vm)
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handle = obj.Object("_OBJECT_HEADER",
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offset = (p & ~7) -
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self.obj_vm.profile.get_obj_offset('_OBJECT_HEADER', 'Body'),
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vm = self.obj_vm)
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return handle
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#--------------------------------------------------------------------------------
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# profile modifications
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#--------------------------------------------------------------------------------
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class MalwarePspCid(obj.ProfileModification):
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before = ['WindowsOverlay', 'WindowsVTypes']
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conditions = {'os': lambda x: x == 'windows'}
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def modification(self, profile):
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profile.vtypes.update({"_PSP_CID_TABLE" : profile.vtypes["_HANDLE_TABLE"]})
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profile.merge_overlay({"_KDDEBUGGER_DATA64" : [None,
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{'PspCidTable': [None,
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["pointer", ["pointer", ['_PSP_CID_TABLE']]]],
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}]})
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profile.object_classes.update({
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'_PSP_CID_TABLE': _PSP_CID_TABLE,
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})
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#--------------------------------------------------------------------------------
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# psxview plugin
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#--------------------------------------------------------------------------------
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class PsXview(common.AbstractWindowsCommand, sessions.SessionsMixin):
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"Find hidden processes with various process listings"
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def __init__(self, config, *args):
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common.AbstractWindowsCommand.__init__(self, config, *args)
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config.add_option("PHYSICAL-OFFSET", short_option = 'P', default = False,
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help = "Physcal Offset", action = "store_true")
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def check_pslist(self, all_tasks):
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"""Enumerate processes from PsActiveProcessHead"""
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return dict((p.obj_vm.vtop(p.obj_offset), p) for p in all_tasks)
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def check_psscan(self):
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"""Enumerate processes with pool tag scanning"""
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return dict((p.obj_offset, p)
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for p in filescan.PSScan(self._config).calculate())
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def check_thrdproc(self, _addr_space):
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"""Enumerate processes indirectly by ETHREAD scanning"""
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ret = dict()
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for ethread in modscan.ThrdScan(self._config).calculate():
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if ethread.ExitTime != 0:
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continue
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# Bounce back to the threads owner
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process = None
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if hasattr(ethread.Tcb, 'Process'):
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process = ethread.Tcb.Process.dereference_as('_EPROCESS')
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elif hasattr(ethread, 'ThreadsProcess'):
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process = ethread.ThreadsProcess.dereference()
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# Make sure the bounce succeeded
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if (process and process.ExitTime == 0 and
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process.UniqueProcessId > 0 and
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process.UniqueProcessId < 65535):
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ret[process.obj_vm.vtop(process.obj_offset)] = process
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return ret
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def check_sessions(self, addr_space):
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"""Enumerate processes from session structures"""
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ret = dict()
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for session in self.session_spaces(addr_space):
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for process in session.processes():
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ret[process.obj_vm.vtop(process.obj_offset)] = process
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return ret
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def check_desktop_thread(self, addr_space):
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"""Enumerate processes from desktop threads"""
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ret = dict()
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for windowstation in windowstations.WndScan(self._config).calculate():
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for desktop in windowstation.desktops():
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for thread in desktop.threads():
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process = thread.ppi.Process.dereference()
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if process == None:
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continue
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ret[process.obj_vm.vtop(process.obj_offset)] = process
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return ret
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def check_pspcid(self, addr_space):
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"""Enumerate processes by walking the PspCidTable"""
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ret = dict()
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# Follow the pointers to the table base
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kdbg = tasks.get_kdbg(addr_space)
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PspCidTable = kdbg.PspCidTable.dereference().dereference()
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# Walk the handle table
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for handle in PspCidTable.handles():
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if handle.get_object_type() == "Process":
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process = handle.dereference_as("_EPROCESS")
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ret[process.obj_vm.vtop(process.obj_offset)] = process
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return ret
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def check_csrss_handles(self, all_tasks):
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"""Enumerate processes using the csrss.exe handle table"""
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ret = dict()
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for p in all_tasks:
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if str(p.ImageFileName).lower() == "csrss.exe":
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# Gather the handles to process objects
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for handle in p.ObjectTable.handles():
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if handle.get_object_type() == "Process":
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process = handle.dereference_as("_EPROCESS")
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ret[process.obj_vm.vtop(process.obj_offset)] = process
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return ret
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def calculate(self):
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addr_space = utils.load_as(self._config)
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all_tasks = list(tasks.pslist(addr_space))
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ps_sources = {}
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# The keys are names of process sources. The values
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# are dictionaries whose keys are physical process
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# offsets and the values are _EPROCESS objects.
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ps_sources['pslist'] = self.check_pslist(all_tasks)
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ps_sources['psscan'] = self.check_psscan()
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ps_sources['thrdproc'] = self.check_thrdproc(addr_space)
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ps_sources['csrss'] = self.check_csrss_handles(all_tasks)
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ps_sources['pspcid'] = self.check_pspcid(addr_space)
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ps_sources['session'] = self.check_sessions(addr_space)
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ps_sources['deskthrd'] = self.check_desktop_thread(addr_space)
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# Build a list of offsets from all sources
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seen_offsets = []
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for source in ps_sources.values():
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for offset in source.keys():
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if offset not in seen_offsets:
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seen_offsets.append(offset)
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yield offset, source[offset], ps_sources
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def render_text(self, outfd, data):
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self.table_header(outfd, [('Offset(P)', '[addrpad]'),
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('Name', '<20'),
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('PID', '>6'),
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('pslist', '5'),
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('psscan', '5'),
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('thrdproc', '5'),
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('pspcid', '5'),
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('csrss', '5'),
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('session', '5'),
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('deskthrd', '5'),
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])
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for offset, process, ps_sources in data:
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self.table_row(outfd,
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offset,
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process.ImageFileName,
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process.UniqueProcessId,
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str(ps_sources['pslist'].has_key(offset)),
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str(ps_sources['psscan'].has_key(offset)),
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str(ps_sources['thrdproc'].has_key(offset)),
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str(ps_sources['pspcid'].has_key(offset)),
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str(ps_sources['csrss'].has_key(offset)),
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str(ps_sources['session'].has_key(offset)),
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str(ps_sources['deskthrd'].has_key(offset))
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)
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