/usr/lib/python2.7/dist-packages/volatility/plugins/mftparser.py is in volatility 2.6-1.
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) 2008-2013 Volatility Foundation
# Copyright (C) 2011 Jamie Levy (Gleeda) <jamie@memoryanalysis.net>
#
# This file is part of Volatility.
#
# Volatility 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.
#
# Volatility 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 Volatility. If not, see <http://www.gnu.org/licenses/>.
#
"""
@author: Jamie Levy (gleeda)
@license: GNU General Public License 2.0
@contact: jamie@memoryanalysis.net
@organization: Volatility Foundation
"""
# Information for this script taken heavily from File System Forensic Analysis by Brian Carrier
from volatility import renderers
import volatility.plugins.common as common
from volatility.renderers.basic import Address
import volatility.plugins.overlays.basic as basic
import volatility.scan as scan
import volatility.utils as utils
import volatility.addrspace as addrspace
import volatility.obj as obj
import volatility.debug as debug
import struct
import binascii
import os
import volatility.poolscan as poolscan
import sys
reload(sys)
sys.setdefaultencoding('utf8')
class UnicodeString(basic.String):
def __str__(self):
result = self.obj_vm.zread(self.obj_offset, self.length).split("\x00\x00")[0].decode("utf16", "ignore")
if not result:
result = ""
return result
def v(self):
result = self.obj_vm.zread(self.obj_offset, self.length).split("\x00\x00")[0].decode("utf16", "ignore")
if not result:
return obj.NoneObject("Cannot read string length {0} at {1:#x}".format(self.length, self.obj_offset))
return result
ATTRIBUTE_TYPE_ID = {
0x10:"STANDARD_INFORMATION",
0x20:"ATTRIBUTE_LIST",
0x30:"FILE_NAME",
0x40:"OBJECT_ID",
0x50:"SECURITY_DESCRIPTOR",
0x60:"VOLUME_NAME",
0x70:"VOLUME_INFORMATION",
0x80:"DATA",
0x90:"INDEX_ROOT",
0xa0:"INDEX_ALLOCATION",
0xb0:"BITMAP",
0xc0:"REPARSE_POINT",
0xd0:"EA_INFORMATION", #Extended Attribute
0xe0:"EA",
0xf0:"PROPERTY_SET",
0x100:"LOGGED_UTILITY_STREAM",
}
VERBOSE_STANDARD_INFO_FLAGS = {
0x1:"Read Only",
0x2:"Hidden",
0x4:"System",
0x20:"Archive",
0x40:"Device",
0x80:"Normal",
0x100:"Temporary",
0x200:"Sparse File",
0x400:"Reparse Point",
0x800:"Compressed",
0x1000:"Offline",
0x2000:"Content not indexed",
0x4000:"Encrypted",
0x10000000:"Directory",
0x20000000:"Index view",
}
# this method taken from mftscan by tecamac in issue 309:
# http://code.google.com/p/volatility/issues/detail?id=309
# I like that it's more readable than the long version I had above :-)
SHORT_STANDARD_INFO_FLAGS = {
0x1:"r",
0x2:"h",
0x4:"s",
0x20:"a",
0x40:"d",
0x80:"n",
0x100:"t",
0x200:"S",
0x400:"r",
0x800:"c",
0x1000:"o",
0x2000:"I",
0x4000:"e",
0x10000000:"D",
0x20000000:"i",
}
FILE_NAME_NAMESPACE = {
0x0:"POSIX", # Case sensitive, allows all Unicode chars except '/' and NULL
0x1:"Win32", # Case insensitive, allows most Unicide except specials ('/', '\', ';', '>', '<', '?')
0x2:"DOS", # Case insensitive, upper case, no special chars, name is 8 or fewer chars in name and 3 or less extension
0x3:"Win32 & DOS", # Used when original name fits in DOS namespace and 2 names are not needed
}
MFT_FLAGS = {
0x1:"In Use",
0x2:"Directory", # if flag & 0x0002 == 0 this is a regular file
}
INDEX_ENTRY_FLAGS = {
0x1:"Child Node Exists",
0x2:"Last entry in list",
}
MFT_PATHS_FULL = {}
class MFT_FILE_RECORD(obj.CType):
def remove_unprintable(self, str):
return str.encode("utf8", "ignore")
def add_path(self, fileinfo):
# it doesn't really make sense to add regular files to parent directory,
# since they wouldn't actually be in the middle of a file path, but at the end
# therefore, we'll return for regular files
if not self.is_directory():
return
# otherwise keep a record of the directory that we've found
cur = MFT_PATHS_FULL.get(int(self.RecordNumber), None)
if (cur == None or fileinfo.Namespace != 2) and fileinfo.is_valid():
temp = {}
temp["ParentDirectory"] = fileinfo.ParentDirectory
temp["filename"] = self.remove_unprintable(fileinfo.get_name())
MFT_PATHS_FULL[int(self.RecordNumber)] = temp
def get_full_path(self, fileinfo):
if self.obj_vm._config.DEBUGOUT:
print "Building path for file {0}".format(fileinfo.get_name())
parent = ""
path = self.remove_unprintable(fileinfo.get_name()) or "(Null)"
try:
parent_id = fileinfo.ParentDirectory & 0xffffff
except struct.error:
return path
if int(self.RecordNumber) == 5 or int(self.RecordNumber) == 0:
return path
seen = set()
while parent != {}:
seen.add(parent_id)
parent = MFT_PATHS_FULL.get(int(parent_id), {})
if parent == {} or parent["filename"] == "" or int(parent_id) == 0 or int(parent_id) == 5:
return path
path = "{0}\\{1}".format(parent["filename"], path)
parent_id = parent["ParentDirectory"] & 0xffffff
if parent_id in seen:
return path
return path
def is_directory(self):
return int(self.Flags) & 0x2
def is_file(self):
return int(self.Flags) & 0x2 == 0
def is_inuse(self):
return int(self.Flags) & 0x1 == 0x1
def get_mft_type(self):
return "{0}{1}".format("In Use & " if self.is_inuse() else "",
"Directory" if self.is_directory() else "File")
def parse_attributes(self, mft_buff, check = True, entrysize = 1024):
next_attr = self.ResidentAttributes
end = mft_buff.find("\xff\xff\xff\xff")
if end == -1:
end = entrysize
attributes = []
dataseen = False
while next_attr != None and next_attr.obj_offset <= end:
try:
attr = ATTRIBUTE_TYPE_ID.get(int(next_attr.Header.Type), None)
except struct.error:
next_attr = None
attr = None
continue
if attr == None:
next_attr = None
elif attr == "STANDARD_INFORMATION":
if self.obj_vm._config.DEBUGOUT:
print "Found $SI"
if not check or next_attr.STDInfo.is_valid():
attributes.append((attr, next_attr.STDInfo))
next_off = next_attr.STDInfo.obj_offset + next_attr.ContentSize
if next_off == next_attr.STDInfo.obj_offset:
next_attr = None
continue
next_attr = self.advance_one(next_off, mft_buff, end)
elif attr == 'FILE_NAME':
if self.obj_vm._config.DEBUGOUT:
print "Found $FN"
self.add_path(next_attr.FileName)
if not check or next_attr.FileName.is_valid():
attributes.append((attr, next_attr.FileName))
next_off = next_attr.FileName.obj_offset + next_attr.ContentSize
if next_off == next_attr.FileName.obj_offset:
next_attr = None
continue
next_attr = self.advance_one(next_off, mft_buff, end)
elif attr == "OBJECT_ID":
if self.obj_vm._config.DEBUGOUT:
print "Found $ObjectId"
if next_attr.Header.NonResidentFlag == 1:
attributes.append((attr, "Non-Resident"))
next_attr = None
continue
else:
attributes.append((attr, next_attr.ObjectID))
next_off = next_attr.ObjectID.obj_offset + next_attr.ContentSize
if next_off == next_attr.ObjectID.obj_offset:
next_attr = None
continue
next_attr = self.advance_one(next_off, mft_buff, end)
elif attr == "DATA":
if self.obj_vm._config.DEBUGOUT:
print "Found $DATA"
try:
if next_attr.Header and next_attr.Header.NameOffset > 0 and next_attr.Header.NameLength > 0:
adsname = ""
if next_attr != None and next_attr.Header != None and next_attr.Header.NameOffset and next_attr.Header.NameLength:
nameloc = next_attr.obj_offset + next_attr.Header.NameOffset
adsname = obj.Object("UnicodeString", vm = self.obj_vm, offset = nameloc, length = next_attr.Header.NameLength * 2)
if adsname != None and adsname.strip() != "" and dataseen:
attr += " ADS Name: {0}".format(adsname.strip())
dataseen = True
except struct.error:
next_attr = None
continue
try:
if next_attr.ContentSize == 0:
next_off = next_attr.obj_offset + self.obj_vm.profile.get_obj_size("RESIDENT_ATTRIBUTE")
next_attr = self.advance_one(next_off, mft_buff, end)
attributes.append((attr, ""))
continue
start = next_attr.obj_offset + next_attr.ContentOffset
theend = min(start + next_attr.ContentSize, end)
except struct.error:
next_attr = None
continue
if next_attr.Header.NonResidentFlag == 1:
thedata = ""
else:
try:
contents = mft_buff[start:theend]
except TypeError:
next_attr = None
continue
thedata = contents
attributes.append((attr, thedata))
next_off = theend
if next_off == start:
next_attr = None
continue
next_attr = self.advance_one(next_off, mft_buff, end)
elif attr == "ATTRIBUTE_LIST":
if self.obj_vm._config.DEBUGOUT:
print "Found $AttributeList"
if next_attr.Header.NonResidentFlag == 1:
attributes.append((attr, "Non-Resident"))
next_attr = None
continue
next_attr.process_attr_list(self.obj_vm, self, attributes, check)
next_attr = None
else:
next_attr = None
return attributes
def advance_one(self, next_off, mft_buff, end):
item = None
attr = None
cursor = 0
if next_off == None:
return None
while attr == None and cursor <= end:
try:
val = struct.unpack("<I", mft_buff[next_off + cursor: next_off + cursor + 4])[0]
attr = ATTRIBUTE_TYPE_ID.get(val, None)
item = obj.Object('RESIDENT_ATTRIBUTE', vm = self.obj_vm,
offset = next_off + cursor)
except struct.error:
return None
cursor += 1
return item
class RESIDENT_ATTRIBUTE(obj.CType):
def process_attr_list(self, bufferas, mft_entry, attributes = [], check = True):
start = 0
end = self.obj_offset + self.ContentSize
while start < end:
item = obj.Object("ATTRIBUTE_LIST", vm = bufferas,
offset = self.AttributeList.obj_offset + start)
if item == None:
return
try:
thetype = ATTRIBUTE_TYPE_ID.get(int(item.Type), None)
if thetype == None:
return
elif item.Length > 0x20 and thetype in ["STANDARD_INFORMATION", "FILE_NAME"]:
theitem = obj.Object(thetype, vm = bufferas, offset = item.AttributeID.obj_offset)
if thetype == "STANDARD_INFORMATION" and (not check or theitem.is_valid()):
attributes.append(("STANDARD_INFORMATION (AL)", theitem))
elif thetype == "FILE_NAME" and (not check or theitem.is_valid()):
mft_entry.add_path(theitem)
attributes.append(("FILE_NAME (AL)", theitem))
except struct.error:
return
if item.Length <= 0:
return
start += item.Length
class STANDARD_INFORMATION(obj.CType):
# XXX need a better check than this
# we return valid if we have _any_ timestamp other than Null
def is_valid(self):
try:
modified = self.ModifiedTime.v()
except struct.error:
modified = 0
try:
mftaltered = self.MFTAlteredTime.v()
except struct.error:
mftaltered = 0
try:
creation = self.CreationTime.v()
except struct.error:
creation = 0
try:
accessed = self.FileAccessedTime.v()
except struct.error:
accessed = 0
return obj.CType.is_valid(self) and (modified != 0 or mftaltered != 0 or \
accessed != 0 or creation != 0)
def get_type_short(self):
try:
if self.Flags == None:
return "?"
except struct.error:
return "?"
type = ""
for i, j in sorted(SHORT_STANDARD_INFO_FLAGS.items()):
if i & self.Flags == i:
type += j
else:
type += "-"
return type
def get_type(self):
try:
if self.Flags == None:
return "Unknown Type"
except struct.error:
return "Unknown Type"
type = None
for i in VERBOSE_STANDARD_INFO_FLAGS:
if (i & self.Flags) == i:
if type == None:
type = VERBOSE_STANDARD_INFO_FLAGS[i]
else:
type += " & " + VERBOSE_STANDARD_INFO_FLAGS[i]
if type == None:
type = "Unknown Type "
return type
def get_header(self):
return [("Creation", "30"),
("Modified", "30"),
("MFT Altered", "30"),
("Access Date", "30"),
("Type", ""),
]
def __str__(self):
bufferas = addrspace.BufferAddressSpace(self.obj_vm._config, data = "\x00\x00\x00\x00\x00\x00\x00\x00")
nulltime = obj.Object("WinTimeStamp", vm = bufferas, offset = 0, is_utc = True)
try:
modified = str(self.ModifiedTime)
except struct.error:
modified = nulltime
try:
mftaltered = str(self.MFTAlteredTime)
except struct.error:
mftaltered = nulltime
try:
creation = str(self.CreationTime)
except struct.error:
creation = nulltime
try:
accessed = str(self.FileAccessedTime)
except struct.error:
accessed = nulltime
return "{0:20} {1:30} {2:30} {3:30} {4}".format(creation, modified, mftaltered, accessed, self.get_type())
def body(self, path, record_num, size, offset):
if path.strip() == "" or path == None:
# if the path is null we just try to get the filename
# from our dictionary and print the body file output
record = MFT_PATHS_FULL.get(int(record_num), {})
path = "(Possible non-base entry, extra $SI or invalid $FN)"
if record != {}:
# we include with the found filename a note that this may be a
# non-base entry. the analyst can investigate these types of records
# on his/her own by comparing record numbers in output or examining the
# given physical offset in memory for example
path = "{0} {1}".format(record["filename"], path)
try:
modified = self.ModifiedTime.v()
except struct.error:
modified = 0
try:
mftaltered = self.MFTAlteredTime.v()
except struct.error:
mftaltered = 0
try:
creation = self.CreationTime.v()
except struct.error:
creation = 0
try:
accessed = self.FileAccessedTime.v()
except struct.error:
accessed = 0
return "[{9}MFT STD_INFO] {0} (Offset: 0x{1:x})|{2}|{3}|0|0|{4}|{5}|{6}|{7}|{8}".format(
path,
offset,
record_num,
self.get_type_short(),
size,
accessed,
modified,
mftaltered,
creation,
self.obj_vm._config.MACHINE)
class FILE_NAME(STANDARD_INFORMATION):
def remove_unprintable(self, str):
return str.encode("utf8", "ignore")
# XXX need a better check than this
# we return valid if we have _any_ timestamp other than Null
# filename must also be a non-empty string
def is_valid(self):
try:
modified = self.ModifiedTime.v()
except struct.error:
modified = 0
try:
mftaltered = self.MFTAlteredTime.v()
except struct.error:
mftaltered = 0
try:
creation = self.CreationTime.v()
except struct.error:
creation = 0
try:
accessed = self.FileAccessedTime.v()
except struct.error:
accessed = 0
return obj.CType.is_valid(self) and (modified != 0 or mftaltered != 0 or \
accessed != 0 or creation != 0) #and \
#self.remove_unprintable(self.get_name()) != ""
def get_name(self):
if self.NameLength == None or self.NameLength == 0:
return ""
return self.remove_unprintable(self.Name)
def get_header(self):
return [("Creation", "30"),
("Modified", "30"),
("MFT Altered", "30"),
("Access Date", "30"),
("Name/Path", ""),
]
def __str__(self):
bufferas = addrspace.BufferAddressSpace(self.obj_vm._config, data = "\x00\x00\x00\x00\x00\x00\x00\x00")
nulltime = obj.Object("WinTimeStamp", vm = bufferas, offset = 0, is_utc = True)
try:
modified = str(self.ModifiedTime)
except struct.error:
modified = nulltime
try:
mftaltered = str(self.MFTAlteredTime)
except struct.error:
mftaltered = nulltime
try:
creation = str(self.CreationTime)
except struct.error:
creation = nulltime
try:
accessed = str(self.FileAccessedTime)
except struct.error:
accessed = nulltime
return "{0:20} {1:30} {2:30} {3:30} {4}".format(creation, modified, mftaltered, accessed,
self.remove_unprintable(self.get_name()))
def get_full(self, full):
bufferas = addrspace.BufferAddressSpace(self.obj_vm._config, data = "\x00\x00\x00\x00\x00\x00\x00\x00")
nulltime = obj.Object("WinTimeStamp", vm = bufferas, offset = 0, is_utc = True)
try:
modified = str(self.ModifiedTime)
except struct.error:
modified = nulltime
try:
mftaltered = str(self.MFTAlteredTime)
except struct.error:
mftaltered = nulltime
try:
creation = str(self.CreationTime)
except struct.error:
creation = nulltime
try:
accessed = str(self.FileAccessedTime)
except struct.error:
accessed = nulltime
try:
return "{0:20} {1:30} {2:30} {3:30} {4}".format(creation,
modified,
mftaltered,
accessed,
self.remove_unprintable(full))
except struct.error:
return None
def body(self, path, record_num, size, offset):
try:
modified = self.ModifiedTime.v()
except struct.error:
modified = 0
try:
mftaltered = self.MFTAlteredTime.v()
except struct.error:
mftaltered = 0
try:
creation = self.CreationTime.v()
except struct.error:
creation = 0
try:
accessed = self.FileAccessedTime.v()
except struct.error:
accessed = 0
return "[{9}MFT FILE_NAME] {0} (Offset: 0x{1:x})|{2}|{3}|0|0|{4}|{5}|{6}|{7}|{8}".format(
path,
offset,
record_num,
self.get_type_short(),
size,
accessed,
modified,
mftaltered,
creation,
self.obj_vm._config.MACHINE)
class OBJECT_ID(obj.CType):
# Modified from analyzeMFT.py:
def FmtObjectID(self, item):
record = ""
for i in item:
record += str(i)
return "{0}-{1}-{2}-{3}-{4}".format(binascii.hexlify(record[0:4]), binascii.hexlify(record[4:6]),
binascii.hexlify(record[6:8]), binascii.hexlify(record[8:10]), binascii.hexlify(record[10:16]))
def __str__(self):
string = "Object ID: {0}\n".format(self.FmtObjectID(self.ObjectID))
string += "Birth Volume ID: {0}\n".format(self.FmtObjectID(self.BirthVolumeID))
string += "Birth Object ID: {0}\n".format(self.FmtObjectID(self.BirthObjectID))
string += "Birth Domain ID: {0}\n".format(self.FmtObjectID(self.BirthDomainID))
return string
# Using structures defined in File System Forensic Analysis pg 353+
MFT_types = {
'MFT_FILE_RECORD': [ 0x400, {
'Signature': [ 0x0, ['unsigned int']],
'FixupArrayOffset': [ 0x4, ['unsigned short']],
'NumFixupEntries': [ 0x6, ['unsigned short']],
'LSN': [ 0x8, ['unsigned long long']],
'SequenceValue': [ 0x10, ['unsigned short']],
'LinkCount': [ 0x12, ['unsigned short']],
'FirstAttributeOffset': [0x14, ['unsigned short']],
'Flags': [0x16, ['unsigned short']],
'EntryUsedSize': [0x18, ['int']],
'EntryAllocatedSize': [0x1c, ['unsigned int']],
'FileRefBaseRecord': [0x20, ['unsigned long long']],
'NextAttributeID': [0x28, ['unsigned short']],
'RecordNumber': [0x2c, ['unsigned long']],
'FixupArray': lambda x: obj.Object("Array", offset = x.obj_offset + x.FixupArrayOffset, count = x.NumFixupEntries, vm = x.obj_vm,
target = obj.Curry(obj.Object, "unsigned short")),
'ResidentAttributes': lambda x : obj.Object("RESIDENT_ATTRIBUTE", offset = x.obj_offset + x.FirstAttributeOffset, vm = x.obj_vm),
'NonResidentAttributes': lambda x : obj.Object("NON_RESIDENT_ATTRIBUTE", offset = x.obj_offset + x.FirstAttributeOffset, vm = x.obj_vm),
}],
'ATTRIBUTE_HEADER': [ 0x10, {
'Type': [0x0, ['int']],
'Length': [0x4, ['int']],
'NonResidentFlag': [0x8, ['unsigned char']],
'NameLength': [0x9, ['unsigned char']],
'NameOffset': [0xa, ['unsigned short']],
'Flags': [0xc, ['unsigned short']],
'AttributeID': [0xe, ['unsigned short']],
}],
'RESIDENT_ATTRIBUTE': [0x16, {
'Header': [0x0, ['ATTRIBUTE_HEADER']],
'ContentSize': [0x10, ['unsigned int']], #relative to the beginning of the attribute
'ContentOffset': [0x14, ['unsigned short']],
'STDInfo': lambda x : obj.Object("STANDARD_INFORMATION", offset = x.obj_offset + x.ContentOffset, vm = x.obj_vm),
'FileName': lambda x : obj.Object("FILE_NAME", offset = x.obj_offset + x.ContentOffset, vm = x.obj_vm),
'ObjectID': lambda x : obj.Object("OBJECT_ID", offset = x.obj_offset + x.ContentOffset, vm = x.obj_vm),
'AttributeList':lambda x : obj.Object("ATTRIBUTE_LIST", offset = x.obj_offset + x.ContentOffset, vm = x.obj_vm),
}],
'NON_RESIDENT_ATTRIBUTE': [0x40, {
'Header': [0x0, ['ATTRIBUTE_HEADER']],
'StartingVCN': [0x10, ['unsigned long long']],
'EndingVCN': [0x18, ['unsigned long long']],
'RunListOffset': [0x20, ['unsigned short']],
'CompressionUnitSize': [0x22, ['unsigned short']],
'Unused': [0x24, ['int']],
'AllocatedAttributeSize': [0x28, ['unsigned long long']],
'ActualAttributeSize': [0x30, ['unsigned long long']],
'InitializedAttributeSize': [0x38, ['unsigned long long']],
}],
'EA_INFORMATION': [None, {
'EaPackedLength': [0x0, ['int']],
'EaCount': [0x4, ['int']],
'EaUnpackedLength': [0x8, ['long']],
}],
'EA': [None, {
'NextEntryOffset': [0x0, ['unsigned long long']],
'Flags': [0x8, ['unsigned char']],
'EaNameLength': [0x9, ['unsigned char']],
'EaValueLength': [0xa, ['unsigned short']],
'EaName': [0xc, ['String', dict(length = lambda x: x.EaNameLength)]],
'EaValue': lambda x: obj.Object("Array", offset = x.obj_offset + len(x.EaName), count = x.EaValueLength, vm = x.obj_vm,
target = obj.Curry(obj.Object, "unsigned char")),
}],
'STANDARD_INFORMATION': [0x48, {
'CreationTime': [0x0, ['WinTimeStamp', dict(is_utc = True)]],
'ModifiedTime': [0x8, ['WinTimeStamp', dict(is_utc = True)]],
'MFTAlteredTime': [0x10, ['WinTimeStamp', dict(is_utc = True)]],
'FileAccessedTime': [0x18, ['WinTimeStamp', dict(is_utc = True)]],
'Flags': [0x20, ['int']],
'MaxVersionNumber': [0x24, ['unsigned int']],
'VersionNumber': [0x28, ['unsigned int']],
'ClassID': [0x2c, ['unsigned int']],
'OwnerID': [0x30, ['unsigned int']],
'SecurityID': [0x34, ['unsigned int']],
'QuotaCharged': [0x38, ['unsigned long long']],
'USN': [0x40, ['unsigned long long']],
'NextAttribute': [0x48, ['RESIDENT_ATTRIBUTE']],
}],
'FILE_NAME': [None, {
'ParentDirectory': [0x0, ['unsigned long long']],
'CreationTime': [0x8, ['WinTimeStamp', dict(is_utc = True)]],
'ModifiedTime': [0x10, ['WinTimeStamp', dict(is_utc = True)]],
'MFTAlteredTime': [0x18, ['WinTimeStamp', dict(is_utc = True)]],
'FileAccessedTime': [0x20, ['WinTimeStamp', dict(is_utc = True)]],
'AllocatedFileSize': [0x28, ['unsigned long long']],
'RealFileSize': [0x30, ['unsigned long long']],
'Flags': [0x38, ['unsigned int']],
'ReparseValue': [0x3c, ['unsigned int']],
'NameLength': [0x40, ['unsigned char']],
'Namespace': [0x41, ['unsigned char']],
'Name': [0x42, ['UnicodeString', dict(length = lambda x: x.NameLength * 2)]],
}],
'ATTRIBUTE_LIST': [0x19, {
'Type': [0x0, ['unsigned int']],
'Length': [0x4, ['unsigned short']],
'NameLength': [0x6, ['unsigned char']],
'NameOffset': [0x7, ['unsigned char']],
'StartingVCN': [0x8, ['unigned long long']],
'FileReferenceLocation': [0x10, ['unsigned long long']],
'AttributeID': [0x18, ['unsigned char']],
}],
'OBJECT_ID': [0x40, {
'ObjectID': [0x0, ['array', 0x10, ['char']]],
'BirthVolumeID': [0x10, ['array', 0x10, ['char']]],
'BirthObjectID': [0x20, ['array', 0x10, ['char']]],
'BirthDomainID': [0x30, ['array', 0x10, ['char']]],
}],
'REPARSE_POINT': [0x10, {
'TypeFlags': [0x0, ['unsigned int']],
'DataSize': [0x4, ['unsigned short']],
'Unused': [0x6, ['unsigned short']],
'NameOffset': [0x8, ['unsigned short']],
'NameLength': [0xa, ['unsigned short']],
'PrintNameOffset': [0xc, ['unsigned short']],
'PrintNameLength': [0xe, ['unsigned short']],
}],
'INDEX_ROOT': [None, {
'Type': [0x0, ['unsigned int']],
'SortingRule': [0x4, ['unsigned int']],
'IndexSizeBytes': [0x8, ['unsigned int']],
'IndexSizeClusters': [0xc, ['unsigned char']],
'Unused': [0xd, ['array', 0x3, ['unsigned char']]],
'NodeHeader': [0x10, ['NODE_HEADER']],
}],
'INDEX_ALLOCATION': [None, {
'Signature': [0x0, ['unsigned int']], #INDX though not essential
'FixupArrayOffset': [0x4, ['unsigned short']],
'NumFixupEntries': [ 0x6, ['unsigned short']],
'LSN': [ 0x8, ['unsigned long long']],
'VCN': [0x10, ['unsigned long long']],
'NodeHeader': [0x18, ['NODE_HEADER']],
}],
'NODE_HEADER': [0x10, {
'IndexEntryListOffset': [0x0, ['unsigned int']],
'EndUsedIndexOffset': [0x4, ['unsigned int']],
'EndAllocatedIndexOffset': [0x8, ['unsigned int']],
'Flags': [0xc, ['unsigned int']],
}],
# Index entries
'GENERIC_INDEX_ENTRY': [None, {
'Undefined': [0x0, ['unsigned long long']],
'EntryLength': [0x8, ['unsigned short']],
'ContentLength': [0xa, ['unsigned short']],
'Flags': [0xc, ['unsigned int']],
'Content': [0x10, ['array', lambda x : x.ContentLength , ['unsigned char']]],
# last 8 bytes are VCN of child node, which is only here if flag is set... not sure how to code that yet
}],
'DIRECTORY_INDEX_ENTRY': [None, {
'MFTFileReference': [0x0, ['unsigned long long']],
'EntryLength': [0x8, ['unsigned short']],
'FileNameAttrLength': [0xa, ['unsigned short']],
'Flags': [0xc, ['unsigned int']],
'FileNameAttr': [0x16, ['FILE_NAME']],
# last 8 bytes are VCN of child node, which is only here if flag is set... not sure how to code that yet
}],
}
class MFTTYPES(obj.ProfileModification):
before = ['WindowsObjectClasses']
conditions = {'os': lambda x: x == 'windows'}
def modification(self, profile):
profile.object_classes.update({
'UnicodeString':UnicodeString,
'MFT_FILE_RECORD':MFT_FILE_RECORD,
'FILE_NAME':FILE_NAME,
'STANDARD_INFORMATION':STANDARD_INFORMATION,
'OBJECT_ID':OBJECT_ID,
'RESIDENT_ATTRIBUTE':RESIDENT_ATTRIBUTE,
})
profile.vtypes.update(MFT_types)
class MFTScanner(scan.BaseScanner):
checks = [ ]
def __init__(self, needles = None):
self.needles = needles
self.checks = [ ("MultiStringFinderCheck", {'needles':needles})]
scan.BaseScanner.__init__(self)
def scan(self, address_space, offset = 0, maxlen = None):
for offset in scan.BaseScanner.scan(self, address_space, offset, maxlen):
yield offset
class MFTParser(common.AbstractWindowsCommand):
""" Scans for and parses potential MFT entries """
def __init__(self, config, *args, **kwargs):
common.AbstractWindowsCommand.__init__(self, config, *args, **kwargs)
config.add_option("OFFSET", short_option = "o", default = None,
help = "Physical offset for MFT Entries (comma delimited)")
config.add_option('NOCHECK', short_option = 'N', default = False,
help = 'Only all entries including w/null timestamps',
action = "store_true")
config.add_option("ENTRYSIZE", short_option = "E", default = 1024,
help = "MFT Entry Size",
action = "store", type = "int")
config.add_option('DUMP-DIR', short_option = 'D', default = None,
cache_invalidator = False,
help = 'Directory in which to dump extracted resident files')
config.add_option("MACHINE", default = "",
help = "Machine name to add to timeline header")
config.add_option("DEBUGOUT", default = False,
help = "Output debugging messages",
action = "store_true")
def calculate(self):
if self._config.MACHINE != "":
self._config.update("MACHINE", "{0} ".format(self._config.MACHINE))
offsets = []
address_space = utils.load_as(self._config, astype = 'physical')
if self._config.OFFSET != None:
items = [int(o, 16) for o in self._config.OFFSET.split(',')]
for offset in items:
mft_buff = address_space.read(offset, self._config.ENTRYSIZE)
bufferas = addrspace.BufferAddressSpace(self._config, data = mft_buff)
mft_entry = obj.Object('MFT_FILE_RECORD', vm = bufferas, offset = 0)
offsets.append((offset, mft_entry, mft_buff))
else:
scanner = poolscan.MultiPoolScanner(needles = ['FILE', 'BAAD'])
print "Scanning for MFT entries and building directory, this can take a while"
seen = []
for _, offset in scanner.scan(address_space):
mft_buff = address_space.read(offset, self._config.ENTRYSIZE)
bufferas = addrspace.BufferAddressSpace(self._config, data = mft_buff)
name = ""
try:
mft_entry = obj.Object('MFT_FILE_RECORD', vm = bufferas,
offset = 0)
temp = mft_entry.advance_one(mft_entry.ResidentAttributes.STDInfo.obj_offset + mft_entry.ResidentAttributes.ContentSize, mft_buff, self._config.ENTRYSIZE)
if temp == None:
continue
mft_entry.add_path(temp.FileName)
name = temp.FileName.get_name()
except struct.error:
if self._config.DEBUGOUT:
print "Problem entry at offset:", hex(offset)
continue
if (int(mft_entry.RecordNumber), name) in seen:
continue
else:
seen.append((int(mft_entry.RecordNumber), name))
offsets.append((offset, mft_entry, mft_buff))
for offset, mft_entry, mft_buff in offsets:
if self._config.DEBUGOUT:
print "Processing MFT Entry at offset:", hex(offset)
attributes = mft_entry.parse_attributes(mft_buff, not self._config.NOCHECK, self._config.ENTRYSIZE)
yield offset, mft_entry, attributes
def render_body(self, outfd, data):
if self._config.DUMP_DIR != None and not os.path.isdir(self._config.DUMP_DIR):
debug.error(self._config.DUMP_DIR + " is not a directory")
# Some notes: every base MFT entry should have one $SI and at lease one $FN
# Usually $SI occurs before $FN
# We'll make an effort to get the filename from $FN for $SI
# If there is only one $SI with no $FN we dump whatever information it has
for offset, mft_entry, attributes in data:
si = None
full = ""
datanum = 0
for a, i in attributes:
# we'll have a default file size of -1 for records missing $FN attributes
# note that file size found in $FN may not actually be accurate and will most likely
# be 0. See Carrier, pg 363
size = -1
if a.startswith("STANDARD_INFORMATION"):
if full != "":
# if we are here, we've hit one $FN attribute for this entry already and have the full name
# so we can dump this $SI
outfd.write("0|{0}\n".format(i.body(full, mft_entry.RecordNumber, size, offset)))
elif si != None:
# if we are here then we have more than one $SI attribute for this entry
# since we don't want to lose its info, we'll just dump it for now
# we won't have full path, but we'll have a filename most likely
outfd.write("0|{0}\n".format(i.body("", mft_entry.RecordNumber, size, offset)))
elif si == None:
# this is the usual case and we'll save the $SI to process after we get the full path from the $FN
si = i
elif a.startswith("FILE_NAME"):
if hasattr(i, "ParentDirectory"):
full = mft_entry.get_full_path(i)
size = int(i.RealFileSize)
outfd.write("0|{0}\n".format(i.body(full, mft_entry.RecordNumber, size, offset)))
if si != None:
outfd.write("0|{0}\n".format(si.body(full, mft_entry.RecordNumber, size, offset)))
si = None
elif a.startswith("DATA"):
if len(str(i)) > 0:
file_string = ".".join(["file", "0x{0:x}".format(offset), "data{0}".format(datanum), "dmp"])
datanum += 1
if self._config.DUMP_DIR != None:
of_path = os.path.join(self._config.DUMP_DIR, file_string)
of = open(of_path, 'wb')
of.write(i)
of.close()
if si != None:
# here we have a lone $SI in an MFT entry with no valid $FN. This is most likely a non-base entry
outfd.write("0|{0}\n".format(si.body("", mft_entry.RecordNumber, -1, offset)))
def unified_output(self, data):
return renderers.TreeGrid([("MFT Offset", Address),
("Attribute", str),
("Record", int),
("Link count", int),
("Type", str),
("Creation", str),
("Modified", str),
("MFT Altered", str),
("Access Date", str),
("Value", str)], self.generator(data))
def generator(self, data):
bufferas = addrspace.BufferAddressSpace(self._config, data = "\x00\x00\x00\x00\x00\x00\x00\x00")
nulltime = obj.Object("WinTimeStamp", vm = bufferas, offset = 0, is_utc = True)
for offset, mft_entry, attributes in data:
if not len(attributes):
continue
datnum = 0
for a, i in attributes:
if i == None:
attrdata = ["Invalid (" + a + ")", "", "", "", "", ""]
elif a.startswith("STANDARD_INFORMATION"):
try:
modified = str(i.ModifiedTime)
except struct.error:
modified = nulltime
try:
mftaltered = str(i.MFTAlteredTime)
except struct.error:
mftaltered = nulltime
try:
creation = str(i.CreationTime)
except struct.error:
creation = nulltime
try:
accessed = str(i.FileAccessedTime)
except struct.error:
accessed = nulltime
attrdata = [a, creation,
modified,
mftaltered,
accessed,
i.get_type()]
elif a.startswith("FILE_NAME"):
try:
modified = str(i.ModifiedTime)
except struct.error:
modified = nulltime
try:
mftaltered = str(i.MFTAlteredTime)
except struct.error:
mftaltered = nulltime
try:
creation = str(i.CreationTime)
except struct.error:
creation = nulltime
try:
accessed = str(i.FileAccessedTime)
except struct.error:
accessed = nulltime
attrdata = [a, creation,
modified,
mftaltered,
accessed,
i.remove_unprintable(i.get_name())]
else:
attrdata = [a, "", "", "", "", ""]
yield (0, [Address(offset),
str(mft_entry.get_mft_type()),
int(mft_entry.RecordNumber),
int(mft_entry.LinkCount)] + attrdata)
def render_text(self, outfd, data):
if self._config.DUMP_DIR != None and not os.path.isdir(self._config.DUMP_DIR):
debug.error(self._config.DUMP_DIR + " is not a directory")
border = "*" * 75
for offset, mft_entry, attributes in data:
if len(attributes) == 0:
continue
outfd.write("{0}\n".format(border))
outfd.write("MFT entry found at offset 0x{0:x}\n".format(offset))
outfd.write("Attribute: {0}\n".format(mft_entry.get_mft_type()))
outfd.write("Record Number: {0}\n".format(mft_entry.RecordNumber))
outfd.write("Link count: {0}\n".format(mft_entry.LinkCount))
outfd.write("\n")
# there can be more than one resident $DATA attribute
# e.g. ADS. Therfore we need to differentiate somehow
# to avoid clobbering. For now we'll use a counter (datanum)
datanum = 0
for a, i in attributes:
if i == None:
outfd.write("${0}: malformed entry\n".format(a))
continue
if a.startswith("STANDARD_INFORMATION"):
outfd.write("\n${0}\n".format(a))
self.table_header(outfd, i.get_header())
outfd.write("{0}\n".format(str(i)))
elif a.startswith("FILE_NAME"):
outfd.write("\n${0}\n".format(a))
if hasattr(i, "ParentDirectory"):
full = mft_entry.get_full_path(i)
self.table_header(outfd, i.get_header())
output = i.get_full(full)
if output == None:
continue
outfd.write("{0}\n".format(output))
else:
outfd.write("{0}\n".format(str(i)))
elif a.startswith("DATA"):
outfd.write("\n${0}\n".format(a))
contents = "\n".join(["{0:010x}: {1:<48} {2}".format(o, h, ''.join(c)) for o, h, c in utils.Hexdump(i)])
outfd.write("{0}\n".format(str(contents)))
if len(str(i)) > 0:
file_string = ".".join(["file", "0x{0:x}".format(offset), "data{0}".format(datanum), "dmp"])
datanum += 1
if self._config.DUMP_DIR != None:
of_path = os.path.join(self._config.DUMP_DIR, file_string)
of = open(of_path, 'wb')
of.write(i)
of.close()
elif a == "OBJECT_ID":
outfd.write("\n$OBJECT_ID\n")
outfd.write(str(i))
outfd.write("\n{0}\n".format(border))
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