/usr/lib/python2.7/dist-packages/rekall/plugins/windows/malware/devicetree.py is in python-rekall-core 1.6.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (c) 2010, 2011, 2012 Michael Ligh <michael.ligh@mnin.org>
# Copyright 2013 Google Inc. All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
from rekall import utils
from rekall.plugins.windows import common
from rekall.plugins.windows import filescan
class DeviceTree(common.PoolScannerPlugin):
"Show device tree."
__name = "devicetree"
table_header = [
dict(name="Type", type="TreeNode", width=10, max_depth=10),
dict(name="Address", style="address", padding="0"),
dict(name="Name", width=30),
dict(name="device_type", width=30),
dict(name="Path"),
]
scanner_defaults = dict(
scan_kernel_nonpaged_pool=True
)
def generate_hits(self):
for run in self.generate_memory_ranges():
scanner = filescan.PoolScanDriver(
session=self.session, profile=self.profile,
address_space=run.address_space)
for pool_obj in scanner.scan(run.start, run.length):
for object_obj in pool_obj.IterObject("Driver", freed=True):
yield object_obj.Object
def collect(self):
for driver_obj in self.generate_hits():
yield dict(
Type=utils.AttributedString("DRV", [(0, 30, "BLACK", "RED")]),
Address=driver_obj.obj_offset,
Name=driver_obj.DriverName.v(vm=self.kernel_address_space),
depth=0)
first_device = driver_obj.DeviceObject.dereference(
vm=self.kernel_address_space)
for device in first_device.walk_list("NextDevice"):
device_header = self.profile.Object(
"_OBJECT_HEADER", offset=device.obj_offset -
device.obj_profile.get_obj_offset("_OBJECT_HEADER", "Body"),
vm=device.obj_vm)
device_name = device_header.NameInfo.Name.cast(
vm=self.kernel_address_space)
yield dict(
Type=utils.AttributedString(
"DEV", [(0, 30, "WHITE", "BLUE")]),
Address=device.obj_offset, Name=device_name,
device_type=device.DeviceType,
depth=1)
level = 1
for att_device in device.walk_list(
"AttachedDevice", include_current=False):
yield dict(
Type=utils.AttributedString(
"ATT", [(0, 30, "BLACK", "GREEN")]),
Address=att_device.obj_offset, Name=device_name,
device_type=att_device.DeviceType,
Path=att_device.DriverObject.DriverName,
depth=level + 1)
level += 1
class DriverIrp(common.PoolScannerPlugin):
"Driver IRP hook detection"
__name = "driverirp"
mod_re = None
__args = [
dict(name="regex", type="RegEx",
help='Analyze drivers matching REGEX'),
]
table_header = [
dict(name="divider", type="Divider"),
dict(name="driver", hidden=True),
dict(name="idx", width=4, align="r"),
dict(name="function", width=36),
dict(name="func_addres", style="address"),
dict(name="name")
]
def generate_hits(self):
if not self.scan_specification_requested():
obj_tree_plugin = self.session.plugins.object_tree(
type_regex="Driver")
for hit in obj_tree_plugin.collect():
yield hit["_OBJECT_HEADER"].Object
return
for run in self.generate_memory_ranges():
scanner = filescan.PoolScanDriver(
session=self.session, profile=self.profile,
address_space=run.address_space)
for pool_obj in scanner.scan(run.start, run.length):
for object_obj in pool_obj.IterObject("Driver", freed=True):
yield object_obj.Object
def collect(self):
invalid_address = self.session.address_resolver.get_constant_object(
"nt!IopInvalidDeviceRequest", "Function").obj_offset
for driver_obj in self.generate_hits():
driver_name = driver_obj.DriverName.v(vm=self.kernel_address_space)
# Continue if a regex was supplied and it doesn't match
if self.plugin_args.regex:
if not driver_name:
continue
# Continue if a regex was supplied and it doesn't match
if not self.plugin_args.regex.search(driver_name):
continue
driver_start = driver_obj.DriverStart.v()
driver_end = driver_obj.DriverStart.v() + driver_obj.DriverSize
interesting = False
functions = []
# Write the address and owner of each IRP function
for i, function in enumerate(driver_obj.MajorFunction):
# Make sure this is in the kernel address space.
function = driver_obj.MajorFunction[i].dereference(
vm=self.kernel_address_space)
func_addres = function.obj_offset
if func_addres == None:
continue
symbol = utils.FormattedAddress(
self.session.address_resolver, func_addres)
# Suppress function pointers which point at the default invalid
# address function.
if (self.plugin_args.verbosity < 5 and
func_addres == invalid_address):
continue
highlight = None
# Functions residing within the driver are not suspicious.
if not (driver_start <= func_addres <= driver_end):
interesting = True
# Extra important if we have no idea where it came from.
if not self.session.address_resolver.format_address(
func_addres):
highlight = "important"
functions.append(dict(driver=driver_obj,
idx=i,
function=function.obj_name,
func_addres=func_addres,
name=symbol,
highlight=highlight))
# By default only show interesting drivers.
if (self.plugin_args.verbosity < 2 and not interesting):
continue
# Write the standard header for each driver object
divider = "DriverName: %s %#x-%#x" % (
driver_name, driver_start, driver_end)
yield dict(divider=divider)
for x in functions:
yield x
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