def __init__(self, binary): self.grbit = littleEndian.readInt(binary, 0) if self.grbit == 0x0010 or self.grbit == 0x0800: #self.rtdVt is a 4 byte integer self.rtdVt = littleEndian.readInt(binary,4) self.lengthInBytes = 8 elif self.grbit == 0x0004: #self.rdtVt is a 4 byte boolean self.rtdVt = binary[4:8] self.lengthInBytes = 8 elif self.grbit == 0x0001: #self.rdtVt is a 64 bit floating point number self.rtdVt = binary[4:12] self.lengthInBytes = 12 elif self.grbit == 0x0002: #self.rdtVt is a RDTOpenStr, which MUST be less then 256 characters long strLength = littleEndian.readInt(binary, 4) self.rdtVT = excel_structures.XLUnicodeStringNoCch(binary[8:], strLength) self.lengthInBytes = (strLength << self.rtdVt.doubleByte) + 1 elif self.grbit == 0x1000: #self.rdtVt is a RDTOpenStr, which MUST be at least 256 characters long strLength = littleEndian.readInt(binary, 4) self.rdtVT = excel_structures.XLUnicodeStringNoCch(binary[8:], strLength) self.lengthInBytes = (strLength << self.rtdVt.doubleByte) + 1
def __init__(self, binary):
self.grbit = littleEndian.readInt(binary, 0)
if self.grbit == 0x0010 or self.grbit == 0x0800:
#self.rtdVt is a 4 byte integer
self.rtdVt = littleEndian.readInt(binary, 4)
self.lengthInBytes = 8
elif self.grbit == 0x0004:
#self.rdtVt is a 4 byte boolean
self.rtdVt = binary[4:8]
self.lengthInBytes = 8
elif self.grbit == 0x0001:
#self.rdtVt is a 64 bit floating point number
self.rtdVt = binary[4:12]
self.lengthInBytes = 12
elif self.grbit == 0x0002:
#self.rdtVt is a RDTOpenStr, which MUST be less then 256 characters long
strLength = littleEndian.readInt(binary, 4)
self.rdtVT = excel_structures.XLUnicodeStringNoCch(
binary[8:], strLength)
self.lengthInBytes = (strLength << self.rtdVt.doubleByte) + 1
elif self.grbit == 0x1000:
#self.rdtVt is a RDTOpenStr, which MUST be at least 256 characters long
strLength = littleEndian.readInt(binary, 4)
self.rdtVT = excel_structures.XLUnicodeStringNoCch(
binary[8:], strLength)
self.lengthInBytes = (strLength << self.rtdVt.doubleByte) + 1
def __init__(self, binary):
self.ft = littleEndian.readShort(binary, 0)
self.cb = littleEndian.readShort(binary, 2)
if self.ft != 0x0009:
#print 'Error parsing a FtPictFmla-structure'
return None
self.fmla = ObjFmla(binary[4:])
self.IposInCtlStm = littleEndian.readInt(binary, 6+self.fmla.cbFmla)
self.cbBufInCtlStm = littleEndian.readInt(binary, 10+self.fmla.cbFmla)
def getFat(binaryContent, sectorsize):
header = binaryContent[76:sectorsize]
fatSectors = []
current = 0
fatSect = littleEndian.readInt(header, current)
while not fatSect in (0xFFFFFFFEL, 0xFFFFFFFFL) and current < 512:
fatSectors += [fatSect + 1]
current += 4
fatSect = littleEndian.readInt(header, current)
def getFat(binaryContent, sectorsize):
header = binaryContent[76:sectorsize]
fatSectors = []
current = 0
fatSect = littleEndian.readInt(header, current)
while not fatSect in (0xFFFFFFFEL, 0xFFFFFFFFL) and current < 512:
fatSectors += [fatSect+1]
current += 4
fatSect = littleEndian.readInt(header, current)
def findExternalOleObjectStorageLocation(current_user_stream,
ppt_document_stream):
try:
currentUserAtom = ppt_atom(current_user_stream)
currentUserAtom.size = littleEndian.readInt(currentUserAtom.binaryData,
0)
currentUserAtom.headerToken = currentUserAtom.binaryData[4:8]
currentUserAtom.offsetToCurrentEdit = littleEndian.readInt(
currentUserAtom.binaryData, 8)
except:
#print 'failed to parse currentUserAtom, file might be corrupted!'
return None
if len(ppt_document_stream[currentUserAtom.offsetToCurrentEdit:]) <= 0:
#print 'end of stream?'
return None
#print [ppt_document_stream[currentUserAtom.offsetToCurrentEdit:]]
userEditAtom = ppt_atom(
ppt_document_stream[currentUserAtom.offsetToCurrentEdit:])
userEditAtom.lastSlieIdRef = userEditAtom.binaryData[0:4]
userEditAtom.version = littleEndian.readShort(userEditAtom.binaryData, 4)
userEditAtom.minorVersion = userEditAtom.binaryData[6]
userEditAtom.majorVersion = userEditAtom.binaryData[7]
userEditAtom.offsetLastEdit = littleEndian.readInt(userEditAtom.binaryData,
8)
userEditAtom.offestPersistDirectory = littleEndian.readInt(
userEditAtom.binaryData, 12)
if len(ppt_document_stream[userEditAtom.offestPersistDirectory:]) <= 0:
#print 'end of stream'
return None
persistDirectoryAtom = ppt_atom(
ppt_document_stream[userEditAtom.offestPersistDirectory:])
persistId16bits = littleEndian.readShort(persistDirectoryAtom.binaryData,
0)
persistId4bits = (ord(persistDirectoryAtom.binaryData[2])
& 0b00001111) << (8 * 2)
persistDirectoryAtom.persistId = persistId4bits + persistId16bits
persistDirectoryAtom.cPersist = ((ord(persistDirectoryAtom.binaryData[2]) & 0b11110000) >> 4) +\
(ord(persistDirectoryAtom.binaryData[3]) << 8)
rgPersistOffset = [None] * persistDirectoryAtom.cPersist
for PersistOffsetEntry in range(0, persistDirectoryAtom.cPersist):
rgPersistOffset[PersistOffsetEntry] = littleEndian.readInt(
persistDirectoryAtom.binaryData, 4 + PersistOffsetEntry * 4)
persistDirectoryAtom.rgPersistOffset = rgPersistOffset
externalOleObjectStorages = []
for entry in rgPersistOffset:
potentialExtOleObjectStg = ppt_atom(ppt_document_stream[entry:])
if potentialExtOleObjectStg.head.recType == 0x1011:
externalOleObjectStorages += [entry]
return externalOleObjectStorages
def __init__(self, binary):
if len(binary) != 22:
print 'length doesn\'t match the length of a regular FtCmo structure'
return
self.ft = littleEndian.readShort(binary, 0)
self.cb = littleEndian.readShort(binary, 2)
self.ot = littleEndian.readShort(binary, 4)
self.id = littleEndian.readShort(binary, 6)
self.bitmap = littleEndian.readShort(binary, 8)
self.unused8 = littleEndian.readInt(binary, 10)
self.unused9 = littleEndian.readInt(binary, 14)
self.unused10 = littleEndian.readInt(binary, 18)
if self.ft != 0x15 or self.cb != 0x12:
print 'Error parsing a FtCmo-structure'
return None
def __init__(self, binary, args, json_result):
self.args = args
self.json_result = json_result
self.frtHeader = frtHeader(binary) #12 bytes
self.ichSamePrefix = littleEndian.readInt(binary, 12) #4 bytes
self.XLUnicodeStringSegmentedRTD = XLUnicodeStringSegmentedRTD(binary[16:])
self.rtdOper = rtdOper(binary[self.XLUnicodeStringSegmentedRTD.lengthInBytes:])
def findFlashObjects(self, oleObject):
foundFlashObject = False
for binaryRecord in self.records:
record = BiffRecordHeader(binaryRecord)
if record.type == 93:
try:
objectRecord = Obj(binaryRecord[4:])
#check if a found obj-record has a pictFmla, which is mandatory for flash-objects
if objectRecord.cmo.ot == 0x08:
if objectRecord.pictFmla.fmla.fmla.rgce.ptg == 0x02 and \
'Shockwave' in objectRecord.pictFmla.fmla.embededInfo.stClass.characters:
#get offset of the associated acitveX control in the "ctls"-stream
ctlsStream = oleObject.openstream('Ctls').read()[objectRecord.pictFmla.IposInCtlStm:\
objectRecord.pictFmla.IposInCtlStm+objectRecord.pictFmla.cbBufInCtlStm]
#look for ".swf" suffix and extract path (relative or absolute) to the embedded flash-file
currentOffset = ctlsStream.find('.swf')
if currentOffset == -1:
currentOffset = ctlsStream.find('.\x00s\x00w\x00f')
if currentOffset != -1:
pathLength = 5
path = '.swf'
#reading the path from back to front, since we don't know the length of the path yet
while ctlsStream[currentOffset-3:currentOffset] != '\x00\x00\x00':
path = ctlsStream[currentOffset-2] + path
currentOffset = currentOffset -2
pathLength = pathLength+1
bytesForPath = littleEndian.readInt(ctlsStream, currentOffset-4)
#check if the length of our extracted path matches the 4 bytes in front
#of it, (interpreting the 4 bytes as a unsigned integer in littleendian)
if bytesForPath == pathLength*2:
print 'path to .swf: ' + path
foundFlashObject = True
except AttributeError:
pass
return foundFlashObject
def findScriptlets(self, oleObject):
foundScriptlet = False
binaryClassID = '\xAE\xFD\x24\xAE\xC6\x03\xD1\x11\x8B\x76\x00\x80\xC7\x44\xF3\x89'
for binaryRecord in self.records:
record = BiffRecordHeader(binaryRecord)
if record.type == 93:
try:
objectRecord = Obj(binaryRecord[4:])
#check if a found obj-record has a pictFmla, which is mandatory for scriptlet-controls
if objectRecord.cmo.ot == 0x08:
if objectRecord.pictFmla.fmla.fmla.rgce.ptg == 0x02 and \
'ScriptBridge' in objectRecord.pictFmla.fmla.embededInfo.stClass.characters:
#get offset of the associated acitveX control in the "ctls"-stream
ctlsStream = oleObject.openstream('Ctls').read()[objectRecord.pictFmla.IposInCtlStm:\
objectRecord.pictFmla.IposInCtlStm+objectRecord.pictFmla.cbBufInCtlStm]
pathToSourceFile = ''
if ctlsStream[0:16] == binaryClassID:
#a scriptlet-control will start with a 128-bit signature (ClsID)
pathLength = littleEndian.readInt(ctlsStream, 18)
for character in range(22, 22+(pathLength*2), 2):
pathToSourceFile = pathToSourceFile + ctlsStream[character]
foundScriptlet = True
print 'path to source file: ', pathToSourceFile
except AttributeError:
pass
return foundScriptlet
def findExternalOleObjectStorageLocation(current_user_stream, ppt_document_stream):
try:
currentUserAtom = ppt_atom(current_user_stream)
currentUserAtom.size = littleEndian.readInt(currentUserAtom.binaryData, 0)
currentUserAtom.headerToken = currentUserAtom.binaryData[4:8]
currentUserAtom.offsetToCurrentEdit = littleEndian.readInt(currentUserAtom.binaryData, 8)
except:
#print 'failed to parse currentUserAtom, file might be corrupted!'
return None
if len(ppt_document_stream[currentUserAtom.offsetToCurrentEdit:])<=0:
#print 'end of stream?'
return None
#print [ppt_document_stream[currentUserAtom.offsetToCurrentEdit:]]
userEditAtom = ppt_atom(ppt_document_stream[currentUserAtom.offsetToCurrentEdit:])
userEditAtom.lastSlieIdRef = userEditAtom.binaryData[0:4]
userEditAtom.version = littleEndian.readShort(userEditAtom.binaryData, 4)
userEditAtom.minorVersion = userEditAtom.binaryData[6]
userEditAtom.majorVersion = userEditAtom.binaryData[7]
userEditAtom.offsetLastEdit = littleEndian.readInt(userEditAtom.binaryData, 8)
userEditAtom.offestPersistDirectory = littleEndian.readInt(userEditAtom.binaryData, 12)
if len(ppt_document_stream[userEditAtom.offestPersistDirectory:])<=0:
#print 'end of stream'
return None
persistDirectoryAtom = ppt_atom(ppt_document_stream[userEditAtom.offestPersistDirectory:])
persistId16bits = littleEndian.readShort(persistDirectoryAtom.binaryData, 0)
persistId4bits = (ord(persistDirectoryAtom.binaryData[2]) & 0b00001111) << (8*2)
persistDirectoryAtom.persistId = persistId4bits + persistId16bits
persistDirectoryAtom.cPersist = ((ord(persistDirectoryAtom.binaryData[2]) & 0b11110000) >> 4) +\
(ord(persistDirectoryAtom.binaryData[3]) << 8)
rgPersistOffset = [None]*persistDirectoryAtom.cPersist
for PersistOffsetEntry in range(0, persistDirectoryAtom.cPersist):
rgPersistOffset[PersistOffsetEntry] = littleEndian.readInt(persistDirectoryAtom.binaryData, 4+PersistOffsetEntry*4)
persistDirectoryAtom.rgPersistOffset = rgPersistOffset
externalOleObjectStorages = []
for entry in rgPersistOffset:
potentialExtOleObjectStg = ppt_atom(ppt_document_stream[entry:])
if potentialExtOleObjectStg.head.recType == 0x1011:
externalOleObjectStorages += [entry]
return externalOleObjectStorages
def __init__(self, binary):
binary = binary[4:]
self.vers = littleEndian.readShort(binary, 0)
self.dt = littleEndian.readShort(binary, 2)
self.rupBuild = littleEndian.readShort(binary, 4)
self.rupYear = littleEndian.readShort(binary, 6)
self.bitmap = (littleEndian.readInt(binary, 8)) & int('11111111111111111110000000000000',2)
self.verLowestBiff = binary[12]
self.bitmap2 = ord(binary[13]) & int('11110000',2)
def __init__(self, binary, args, json_result):
self.args = args
self.json_result = json_result
self.frtHeader = frtHeader(binary) #12 bytes
self.ichSamePrefix = littleEndian.readInt(binary, 12) #4 bytes
self.XLUnicodeStringSegmentedRTD = XLUnicodeStringSegmentedRTD(
binary[16:])
self.rtdOper = rtdOper(
binary[self.XLUnicodeStringSegmentedRTD.lengthInBytes:])
def __init__(self, binary):
self.cch = littleEndian.readInt(binary, 0)
self.fHighByte = ord(binary[4])
if self.fHighByte == 0x00:
self.rgb = binary[5:5 + self.cch]
elif self.fHighByte == 0x01:
self.rgb = binary[5:5 + (self.cch * 2)]
else:
#malformed RTD-Record validate will fail
pass
self.lengthInBytes = 5 + (self.cch << self.fHighByte)
def __init__(self, binary): self.cch = littleEndian.readInt(binary, 0) self.fHighByte = ord(binary[4]) if self.fHighByte == 0x00: self.rgb = binary[5:5+self.cch] elif self.fHighByte == 0x01: self.rgb = binary[5:5+(self.cch*2)] else: #malformed RTD-Record validate will fail pass self.lengthInBytes = 5 + (self.cch << self.fHighByte)
def __init__(self, binary):
self.ft = littleEndian.readShort(binary, 0)
self.cb = littleEndian.readShort(binary, 2)
self.unused1 = littleEndian.readInt(binary, 4)
self.iVal = littleEndian.readSignedShort(binary, 8)
self.iMin = littleEndian.readSignedShort(binary, 10)
self.iMax = littleEndian.readSignedShort(binary, 12)
self.dInc = littleEndian.readSignedShort(binary, 14)
self.dPage = littleEndian.readSignedShort(binary, 16)
self.fHoriz = littleEndian.readShort(binary, 18)
self.dxScroll = littleEndian.readSignedShort(binary, 20)
self.flags = (ord(binary[22]) & 0xf0) >> 4
self.unused2 = (ord(binary[22]) & 0x0f) << 8
self.unused2 += ord(binary[23])
def getRecords(self, workbookStream, currentIndex):
#read every record in the given workbookstream and add them to the record list
#until a EOF record is read(EOF record is 4 bytes long and exactly 0x0000000A)
while littleEndian.readInt(workbookStream, currentIndex) != 0x0000000A:
recHeader = BiffRecordHeader(workbookStream[currentIndex:currentIndex+4])
#add current record to records-list
#keep in mind: records are still unformated (binary data)
self.records.append(workbookStream[currentIndex:currentIndex + recHeader.length + 4])
currentIndex = currentIndex + recHeader.length + 4
currentIndex = currentIndex + 4
if currentIndex >= len(workbookStream) -1:
return currentIndex
#check if another substream starts at the end of this stream. just a safety measure
recHeader = BiffRecordHeader(workbookStream[currentIndex:currentIndex+4])
if recHeader.type == 2057 and recHeader.length == 16:
#print 'found start of second substream at offset: %d (0x%08X)' %(currentIndex, currentIndex)
pass
else:
#print 'found data:\r\nType: %d Length: %d' %(recHeader.type, recHeader.length)
pass
return currentIndex
def __init__(self, binary):
self.rt = littleEndian.readShort(binary, 0) #MUST be 0x0813
self.grbitFrt = littleEndian.readShort(binary, 2) #MUST be 0x0000
self.reserved1 = littleEndian.readInt(binary, 4) #MUST be 0x00000000
self.reserved2 = littleEndian.readInt(binary, 8) #MUST be 0x00000000
def __init__(self, binaryString):
temp = littleEndian.readShort(binaryString, 0)
self.recVer = temp & 0x000f
self.recInstance = temp >> 4
self.recType = (ord(binaryString[3]) << 8) + ord(binaryString[2])
self.recLen = littleEndian.readInt(binaryString, 4)
def __init__(self, binary): self.rt = littleEndian.readShort(binary, 0) #MUST be 0x0813 self.grbitFrt = littleEndian.readShort(binary, 2) #MUST be 0x0000 self.reserved1 = littleEndian.readInt(binary, 4) #MUST be 0x00000000 self.reserved2 = littleEndian.readInt(binary, 8) #MUST be 0x00000000
def locateJavascriptSource(self):
foundScripttlet = False
if self.mode == 0:
controlTag = '<ax:ocxPr ax:name="URL" ax:value="'
activeXContainers = []
fileNames = []
for dirname, dirnames, filenames in os.walk(self.pathToActiveX):
for filename in filenames:
fileNames.append(os.path.join(dirname, filename))
filtered = fnmatch.filter(fileNames, '*activeX*.xml')
for activeXcontrol in filtered:
currentControl = open(activeXcontrol, 'r')
controlText = currentControl.read()
#the Class-ID: AE24FDAE-03C6-11D1-8B76-0080C744F389 identifies an activeX-control as flash-object
if self.MSscriptletClassID in controlText:
foundScripttlet = True
if not self.args.quiet:
print activeXcontrol + ' is a MS-Scriptlet!'
activeXBinFileName = activeXcontrol[:-3]
activeXBinFileName += 'bin'
activeXContainers.append(activeXBinFileName)
if controlTag in controlText:
codeOrigin = ''
tagStart = controlText.index(controlTag)
iterator = tagStart + len(controlTag)
while controlText[iterator] != '"':
codeOrigin = codeOrigin + controlText[iterator]
iterator = iterator + 1
print codeOrigin
currentControl.close()
else:
binaryClassID = '\xAE\xFD\x24\xAE\xC6\x03\xD1\x11\x8B\x76\x00\x80\xC7\x44\xF3\x89'
assert OleFileIO_PL.isOleFile(self.fileName)
ole = OleFileIO_PL.OleFileIO(self.fileName)
if self.docType == '/word':
wordDocStream = ole.openstream('WordDocument')
wordDocBuffer = wordDocStream.read()
if 'CONTROL ScriptBridge.ScriptBridge' in wordDocBuffer:
if not self.args.quiet and not self.args.json:
print 'use of MS Scriptlet detected'
listOCXContents = []
listOLEPaths = ole.listdir()
#find all OCXNAME streams in the word file
for path in listOLEPaths:
if path[len(path)-1] == '\x03OCXDATA':
listOCXContents.append('/'.join(x for x in path))
for content in listOCXContents:
OCXStream = ole.openstream(content)
contentBuffer = OCXStream.read()
if contentBuffer[0:16] == binaryClassID:
foundScripttlet = True
pathToSourceFile = ''
pathLength = littleEndian.readInt(contentBuffer, 18)
for character in range(22, 22+(pathLength*2), 2):
pathToSourceFile = pathToSourceFile + contentBuffer[character]
if not self.args.quiet and not self.args.json:
print 'path to source file: ', pathToSourceFile
if self.args.json:
self.locations.append(pathToSourceFile)
OCXStream.close()
elif self.docType == '/xl':
excel_structures = imp.load_source('excel_structures', 'modules/OLE_parsing/excel_structures.py')
ws = excel_structures.workbook(ole)
foundScripttlet = ws.findScriptlets()
elif self.docType == '/ppt':
ppt_structures = imp.load_source('ppt_structures', 'modules/OLE_parsing/ppt_structures.py')
ppt_document_stream = ole.openstream('PowerPoint Document').read()
current_user_stream = ole.openstream('Current User').read()
ppt_scriptlet = ppt_structures.ppt_container(ppt_document_stream)
foundScripttlet = ppt_structures.findScriptlets(ppt_scriptlet)
if foundScripttlet:
folderName = os.path.abspath(self.fileName.split('.')[0])
if not os.path.exists(folderName):
os.makedirs(folderName)
externalOleObjectStorages = ppt_structures.findExternalOleObjectStorageLocation(current_user_stream, ppt_document_stream)
if not externalOleObjectStorages:
return
decompressedStorageFiles = ppt_structures.decompressExternalOleObjectStorage(folderName, ppt_document_stream, externalOleObjectStorages)
for oleStorageFile in decompressedStorageFiles:
currentStorage = OleFileIO_PL.OleFileIO(oleStorageFile)
if not currentStorage.exists('\x03OCXDATA'):
continue
OCXStream = currentStorage.openstream('\x03OCXDATA')
contentBuffer = OCXStream.read()
if contentBuffer[0:16] == binaryClassID:
foundScripttlet = True
pathToSourceFile = ''
pathLength = littleEndian.readInt(contentBuffer, 18)
for character in range(22, 22+(pathLength*2), 2):
pathToSourceFile = pathToSourceFile + contentBuffer[character]
if not self.args.quiet and not self.args.json:
print 'path to source file: ', pathToSourceFile
if self.args.json:
self.locations.append(pathToSourceFile)
OCXStream.close()
currentStorage.close()
if not foundScripttlet and not self.args.quiet and not self.args.json:
print 'no Javascript/Scriptlett detected'
if foundScripttlet:
if self.args.json:
self.json_result['detections'].append({'type': 'javascript/scriptlett', 'location': self.locations})
def locateFlashObjects(self):
pathToActiveX = self.pathToActiveX
fileName = self.fileName
docType = self.docType
foundFlashObject = False
if self.mode == 0:
#this is an XML-based document
activeXContainers = []
fileNames = []
for dirname, dirnames, filenames in os.walk(pathToActiveX):
for filename in filenames:
fileNames.append(os.path.join(dirname, filename))
filtered = fnmatch.filter(fileNames, '*activeX*.xml')
for activeXcontrol in filtered:
currentControl = open(activeXcontrol, 'r')
controlText = currentControl.read()
#the Class-ID: D27CDB6E-AE6D-11CF-96B8-444553540000 identifies an activeX-control as flash-object
if self.ShockwaveFlashClassID in controlText:
if not self.args.quiet and not self.args.json:
print activeXcontrol + " is a FlashObject!"
foundFlashObject = True
activeXBinFileName = activeXcontrol[:-3]
activeXBinFileName += 'bin'
activeXContainers.append(activeXBinFileName)
currentControl.close()
#starting to determine the origin of the .swf file
if self.docType == '/xl':
for activeXBinFileName in activeXContainers:
acitveXStream = open(activeXBinFileName, 'rb').read()
currentOffset = acitveXStream.find('.swf')
if currentOffset == -1:
currentOffset = acitveXStream.find('.\x00s\x00w\x00f')
if currentOffset != -1:
pathLength = 5
path = '.swf'
#reading the path from back to front, since we don't know the length of the path yet
while acitveXStream[currentOffset -
3:currentOffset] != '\x00\x00\x00':
path = acitveXStream[currentOffset - 2] + path
currentOffset = currentOffset - 2
pathLength = pathLength + 1
bytesForPath = littleEndian.readInt(
acitveXStream, currentOffset - 4)
#check if the length of our extracted path matches the 4 bytes in front
#of it, (interpreting the 4 bytes as a unsigned integer in littleendian)
if bytesForPath == pathLength * 2 and not self.args.quiet:
print 'path to .swf: ' + path
if not foundFlashObject and not self.args.quiet and not self.args.json:
print 'found no Flash-Objects'
if foundFlashObject:
if self.args.json:
self.json_result['detections'].append({
'type': 'flash',
'location': None
})
else:
print "found flash object"
return
for activeXBinFileName in activeXContainers:
#make sure that our .bin files are actually OLE-files
assert OleFileIO_PL.isOleFile(activeXBinFileName)
ole = OleFileIO_PL.OleFileIO(activeXBinFileName)
if ole.exists('Contents'):
#Flash-files are embedded via activeX-controls, which are located in the "Contens" folder of the OLE-file
Contents = ole.openstream('Contents')
content = Contents.read()
Contents.close()
else:
if not self.args.quiet and not self.args.json:
print('Contents doesn\'t exsit')
ole.close()
if littleEndian.readShort(content, 24) == 8:
#this means the next 4 bytes (little-endian) will tell the length of an unicode string,
#which will follow right after the length field
pathLength = littleEndian.readInt(content, 26)
pathToSWFfile = ''
for iterator in range(30, 30 + pathLength):
if iterator % 2 == 0:
#every second byte will be 0x00. Office doesn't allow characters, which would have to use this second byte
pathToSWFfile += content[iterator]
#print as a hex string, if you need to search manually in the .bin file
#print (':'.join(x.encode('hex') for x in pathToSWFfile))
if not self.args.quiet and not self.args.json:
print 'path to swf-file: ' + pathToSWFfile
else:
if not self.args.quiet and not self.args.json:
print 'this doesn\'t seem to be an unicode string'
ole.close()
if not foundFlashObject and not self.args.quiet and not self.args.json:
print 'found no Flash-Objects'
if foundFlashObject:
if self.args.json:
self.json_result['detections'].append({
'type': 'flash',
'location': None
})
else:
print "found flash object"
else:
#this is a OLE-formated document
assert OleFileIO_PL.isOleFile(fileName)
ole = OleFileIO_PL.OleFileIO(fileName)
if docType == '/word':
wordDocStream = ole.openstream('WordDocument')
wordDocBuffer = wordDocStream.read()
if 'CONTROL ShockwaveFlash.ShockwaveFlash' in wordDocBuffer:
if not self.args.quiet and not self.args.json:
print 'use of Shockwafe Flash detected'
foundFlashObject = True
else:
if not foundFlashObject and not self.args.quiet and not self.args.json:
print 'found no Flash-Objects'
return
listOCXContents = []
listOLEPaths = ole.listdir()
#print ole.listdir()
#find all OCXNAME streams in the word file
for path in listOLEPaths:
if path[len(path) - 1] == 'Contents':
#print ('/'.join(x for x in path))
listOCXContents.append('/'.join(x for x in path))
for content in listOCXContents:
OCXStream = ole.openstream(content)
contentBuffer = OCXStream.read()
#print contentBuffer
currentOffset = contentBuffer.find('.swf')
if currentOffset == -1:
currentOffset = contentBuffer.find('.\x00s\x00w\x00f')
if currentOffset != -1:
pathLength = 5
path = '.swf'
#reading the path from back to front, since we don't know the length of the path yet
while contentBuffer[currentOffset -
3:currentOffset] != '\x00\x00\x00':
path = contentBuffer[currentOffset - 2] + path
currentOffset = currentOffset - 2
pathLength = pathLength + 1
bytesForPath = littleEndian.readInt(
contentBuffer, currentOffset - 4)
#check if the length of our extracted path matches the 4 bytes in front
#of it, (interpreting the 4 bytes as a unsigned integer in littleendian)
if bytesForPath == pathLength * 2:
#print 'length does match!'
pass
if not self.args.quiet and not self.args.json:
print 'path to .swf: ' + path
else:
if not self.args.quiet and not self.args.json:
print 'no .swf found in contents'
OCXStream.close()
elif docType == '/xl':
excel_structures = imp.load_source(
'excel_structures',
'modules/OLE_parsing/excel_structures.py')
#import excel_structures
ws = excel_structures.workbook(ole)
foundFlashObject = ws.findFlashObjects()
pass
elif docType == '/ppt':
ppt_structures = imp.load_source(
'ppt_structures', 'modules/OLE_parsing/ppt_structures.py')
#import ppt_structures
ppt_document_stream = ole.openstream(
'PowerPoint Document').read()
current_user_stream = ole.openstream('Current User').read()
ppt_flash = ppt_structures.ppt_container(ppt_document_stream)
#find externalOleObjectStorage-Ids, which point to a source of Flash
foundFlashObject = ppt_structures.findShockwaveFlash(ppt_flash)
folderName = os.path.abspath(self.fileName.split('.')[0])
if not os.path.exists(folderName):
os.makedirs(folderName)
externalOleObjectStorages = ppt_structures.findExternalOleObjectStorageLocation(
current_user_stream, ppt_document_stream)
if not externalOleObjectStorages:
return
decompressedStorageFiles = ppt_structures.decompressExternalOleObjectStorage(
folderName, ppt_document_stream, externalOleObjectStorages)
#extract paths to Flash-Objects
currentPersistId = 0
for oleStorageFile in decompressedStorageFiles:
currentStorage = OleFileIO_PL.OleFileIO(oleStorageFile)
if not currentStorage.exists('Contents'):
currentPersistId += 1
continue
contentBuffer = currentStorage.openstream(
'Contents').read()
currentOffset = contentBuffer.find('.swf')
if currentOffset == -1:
currentOffset = contentBuffer.find('.\x00s\x00w\x00f')
if currentOffset != -1:
pathLength = 5
path = '.swf'
#reading the path from back to front, since we don't know the length of the path yet
while contentBuffer[currentOffset -
3:currentOffset] != '\x00\x00\x00':
path = contentBuffer[currentOffset - 2] + path
currentOffset = currentOffset - 2
pathLength = pathLength + 1
if not self.args.quiet and not self.args.json:
print 'path to .swf: ' + path
else:
if not self.args.quiet and not self.args.json:
print 'no .swf found in contents'
currentStorage.close()
currentPersistId += 1
else:
if not self.args.quiet and not self.args.json:
print 'No document type was given'
if not foundFlashObject and not self.args.quiet and not self.args.json:
print 'found no Flash-Objects'
if foundFlashObject:
if self.args.json:
self.json_result['detections'].append({
'type': 'flash',
'location': None
})
else:
print "found flash object"
ole.close()
def __init__(self, binary):
self.ft = littleEndian.readShort(binary, 0)
self.cb = littleEndian.readShort(binary, 2)
self.unused1 = littleEndian.readInt(binary, 4)
self.unused2 = littleEndian.readShort(binary, 8)
def __init__(self, binaryString):
temp = littleEndian.readShort(binaryString, 0)
self.recVer = temp & 0x000f
self.recInstance = temp >> 4
self.recType = (ord(binaryString[3]) << 8) + ord(binaryString[2])
self.recLen = littleEndian.readInt(binaryString, 4)
def getFat(binaryContent, sectorsize):
header = binaryContent[76:sectorsize]
fatSectors = []
current = 0
fatSect = littleEndian.readInt(header, current)
while not fatSect in (0xFFFFFFFEL, 0xFFFFFFFFL) and current < 512:
fatSectors += [fatSect + 1]
current += 4
fatSect = littleEndian.readInt(header, current)
myFat = []
for fatSect in fatSectors:
current = 0
sect = binaryContent[fatSect * sectorsize:(fatSect + 1) * sectorsize]
while current < sectorsize:
if littleEndian.readInt(sect, current) != 0xffffffff:
myFat += [littleEndian.readInt(sect, current)]
current += 4
return myFat
if __name__ == '__main__':
workdir = sys.path[0]
os.chdir(workdir)
helpText = '''
--fileName {name of file to scan for malware}
-f {name of file to scan for malware}
--recursive {folder to scan for office malware}
-r {folder to scan for office malware}
def locateFlashObjects(self):
pathToActiveX = self.pathToActiveX
fileName = self.fileName
docType = self.docType
foundFlashObject = False
if self.mode == 0:
#this is an XML-based document
activeXContainers = []
fileNames = []
for dirname, dirnames, filenames in os.walk(pathToActiveX):
for filename in filenames:
fileNames.append(os.path.join(dirname, filename))
filtered = fnmatch.filter(fileNames, '*activeX*.xml')
for activeXcontrol in filtered:
currentControl = open(activeXcontrol, 'r')
controlText = currentControl.read()
#the Class-ID: D27CDB6E-AE6D-11CF-96B8-444553540000 identifies an activeX-control as flash-object
if self.ShockwaveFlashClassID in controlText:
if not self.args.quiet and not self.args.json:
print activeXcontrol + " is a FlashObject!"
foundFlashObject = True
activeXBinFileName = activeXcontrol[:-3]
activeXBinFileName += 'bin'
activeXContainers.append(activeXBinFileName)
currentControl.close()
#starting to determine the origin of the .swf file
if self.docType == '/xl':
for activeXBinFileName in activeXContainers:
acitveXStream = open(activeXBinFileName, 'rb').read()
currentOffset = acitveXStream.find('.swf')
if currentOffset == -1:
currentOffset = acitveXStream.find('.\x00s\x00w\x00f')
if currentOffset != -1:
pathLength = 5
path = '.swf'
#reading the path from back to front, since we don't know the length of the path yet
while acitveXStream[currentOffset-3:currentOffset] != '\x00\x00\x00':
path = acitveXStream[currentOffset-2] + path
currentOffset = currentOffset -2
pathLength = pathLength+1
bytesForPath = littleEndian.readInt(acitveXStream, currentOffset-4)
#check if the length of our extracted path matches the 4 bytes in front
#of it, (interpreting the 4 bytes as a unsigned integer in littleendian)
if bytesForPath == pathLength*2 and not self.args.quiet:
print 'path to .swf: ' + path
if not foundFlashObject and not self.args.quiet and not self.args.json:
print 'found no Flash-Objects'
if foundFlashObject:
if self.args.json:
self.json_result['detections'].append({'type': 'flash', 'location': None})
else:
print "found flash object"
return
for activeXBinFileName in activeXContainers:
#make sure that our .bin files are actually OLE-files
assert OleFileIO_PL.isOleFile(activeXBinFileName)
ole = OleFileIO_PL.OleFileIO(activeXBinFileName)
if ole.exists('Contents'):
#Flash-files are embedded via activeX-controls, which are located in the "Contens" folder of the OLE-file
Contents = ole.openstream('Contents')
content = Contents.read()
Contents.close()
else:
if not self.args.quiet and not self.args.json:
print('Contents doesn\'t exsit')
ole.close()
if littleEndian.readShort(content, 24) == 8:
#this means the next 4 bytes (little-endian) will tell the length of an unicode string,
#which will follow right after the length field
pathLength = littleEndian.readInt(content, 26)
pathToSWFfile = ''
for iterator in range(30, 30+pathLength):
if iterator % 2 == 0:
#every second byte will be 0x00. Office doesn't allow characters, which would have to use this second byte
pathToSWFfile += content[iterator]
#print as a hex string, if you need to search manually in the .bin file
#print (':'.join(x.encode('hex') for x in pathToSWFfile))
if not self.args.quiet and not self.args.json:
print 'path to swf-file: ' + pathToSWFfile
else:
if not self.args.quiet and not self.args.json:
print 'this doesn\'t seem to be an unicode string'
ole.close()
if not foundFlashObject and not self.args.quiet and not self.args.json:
print 'found no Flash-Objects'
if foundFlashObject:
if self.args.json:
self.json_result['detections'].append({'type': 'flash', 'location': None})
else:
print "found flash object"
else:
#this is a OLE-formated document
assert OleFileIO_PL.isOleFile(fileName)
ole = OleFileIO_PL.OleFileIO(fileName)
if docType == '/word':
wordDocStream = ole.openstream('WordDocument')
wordDocBuffer = wordDocStream.read()
if 'CONTROL ShockwaveFlash.ShockwaveFlash' in wordDocBuffer:
if not self.args.quiet and not self.args.json:
print 'use of Shockwafe Flash detected'
foundFlashObject = True
else:
if not foundFlashObject and not self.args.quiet and not self.args.json:
print 'found no Flash-Objects'
return
listOCXContents = []
listOLEPaths = ole.listdir()
#print ole.listdir()
#find all OCXNAME streams in the word file
for path in listOLEPaths:
if path[len(path)-1] == 'Contents':
#print ('/'.join(x for x in path))
listOCXContents.append('/'.join(x for x in path))
for content in listOCXContents:
OCXStream = ole.openstream(content)
contentBuffer = OCXStream.read()
#print contentBuffer
currentOffset = contentBuffer.find('.swf')
if currentOffset == -1:
currentOffset = contentBuffer.find('.\x00s\x00w\x00f')
if currentOffset != -1:
pathLength = 5
path = '.swf'
#reading the path from back to front, since we don't know the length of the path yet
while contentBuffer[currentOffset-3:currentOffset] != '\x00\x00\x00':
path = contentBuffer[currentOffset-2] + path
currentOffset = currentOffset -2
pathLength = pathLength+1
bytesForPath = littleEndian.readInt(contentBuffer, currentOffset-4)
#check if the length of our extracted path matches the 4 bytes in front
#of it, (interpreting the 4 bytes as a unsigned integer in littleendian)
if bytesForPath == pathLength*2:
#print 'length does match!'
pass
if not self.args.quiet and not self.args.json:
print 'path to .swf: ' + path
else:
if not self.args.quiet and not self.args.json:
print 'no .swf found in contents'
OCXStream.close()
elif docType == '/xl':
excel_structures = imp.load_source('excel_structures', 'modules/OLE_parsing/excel_structures.py')
#import excel_structures
ws = excel_structures.workbook(ole)
foundFlashObject = ws.findFlashObjects()
pass
elif docType == '/ppt':
ppt_structures = imp.load_source('ppt_structures', 'modules/OLE_parsing/ppt_structures.py')
#import ppt_structures
ppt_document_stream = ole.openstream('PowerPoint Document').read()
current_user_stream = ole.openstream('Current User').read()
ppt_flash = ppt_structures.ppt_container(ppt_document_stream)
#find externalOleObjectStorage-Ids, which point to a source of Flash
foundFlashObject = ppt_structures.findShockwaveFlash(ppt_flash)
folderName = os.path.abspath(self.fileName.split('.')[0])
if not os.path.exists(folderName):
os.makedirs(folderName)
externalOleObjectStorages = ppt_structures.findExternalOleObjectStorageLocation(current_user_stream, ppt_document_stream)
if not externalOleObjectStorages:
return
decompressedStorageFiles = ppt_structures.decompressExternalOleObjectStorage(folderName, ppt_document_stream, externalOleObjectStorages)
#extract paths to Flash-Objects
currentPersistId = 0
for oleStorageFile in decompressedStorageFiles:
currentStorage = OleFileIO_PL.OleFileIO(oleStorageFile)
if not currentStorage.exists('Contents'):
currentPersistId += 1
continue
contentBuffer = currentStorage.openstream('Contents').read()
currentOffset = contentBuffer.find('.swf')
if currentOffset == -1:
currentOffset = contentBuffer.find('.\x00s\x00w\x00f')
if currentOffset != -1:
pathLength = 5
path = '.swf'
#reading the path from back to front, since we don't know the length of the path yet
while contentBuffer[currentOffset-3:currentOffset] != '\x00\x00\x00':
path = contentBuffer[currentOffset-2] + path
currentOffset = currentOffset -2
pathLength = pathLength+1
if not self.args.quiet and not self.args.json:
print 'path to .swf: ' + path
else:
if not self.args.quiet and not self.args.json:
print 'no .swf found in contents'
currentStorage.close()
currentPersistId += 1
else:
if not self.args.quiet and not self.args.json:
print 'No document type was given'
if not foundFlashObject and not self.args.quiet and not self.args.json:
print 'found no Flash-Objects'
if foundFlashObject:
if self.args.json:
self.json_result['detections'].append({'type': 'flash', 'location': None})
else:
print "found flash object"
ole.close()
header = binaryContent[76:sectorsize]
fatSectors = []
current = 0
fatSect = littleEndian.readInt(header, current)
while not fatSect in (0xFFFFFFFEL, 0xFFFFFFFFL) and current < 512:
fatSectors += [fatSect+1]
current += 4
fatSect = littleEndian.readInt(header, current)
myFat = []
for fatSect in fatSectors:
current = 0
sect = binaryContent[fatSect*sectorsize:(fatSect+1)*sectorsize]
while current < sectorsize:
if littleEndian.readInt(sect, current) != 0xffffffff:
myFat += [littleEndian.readInt(sect, current)]
current += 4
return myFat
if __name__ == '__main__':
workdir = sys.path[0]
os.chdir(workdir)
helpText = '''
--fileName {name of file to scan for malware}
-f {name of file to scan for malware}
--recursive {folder to scan for office malware}
def locateJavascriptSource(self):
foundScripttlet = False
if self.mode == 0:
controlTag = '<ax:ocxPr ax:name="URL" ax:value="'
activeXContainers = []
fileNames = []
for dirname, dirnames, filenames in os.walk(self.pathToActiveX):
for filename in filenames:
fileNames.append(os.path.join(dirname, filename))
filtered = fnmatch.filter(fileNames, '*activeX*.xml')
#print filtered
for activeXcontrol in filtered:
currentControl = open(activeXcontrol, 'r')
controlText = currentControl.read()
#the Class-ID: AE24FDAE-03C6-11D1-8B76-0080C744F389 identifies an activeX-control as flash-object
if self.MSscriptletClassID in controlText:
foundScripttlet = True
print activeXcontrol + ' is a MS-Scriptlet!'
activeXBinFileName = activeXcontrol[:-3]
activeXBinFileName += 'bin'
activeXContainers.append(activeXBinFileName)
if controlTag in controlText:
codeOrigin = ''
tagStart = controlText.index(controlTag)
iterator = tagStart + len(controlTag)
while controlText[iterator] != '"':
codeOrigin = codeOrigin + controlText[iterator]
iterator = iterator + 1
print codeOrigin
currentControl.close()
else:
binaryClassID = '\xAE\xFD\x24\xAE\xC6\x03\xD1\x11\x8B\x76\x00\x80\xC7\x44\xF3\x89'
assert OleFileIO_PL.isOleFile(self.fileName)
ole = OleFileIO_PL.OleFileIO(self.fileName)
if self.docType == '/word':
wordDocStream = ole.openstream('WordDocument')
wordDocBuffer = wordDocStream.read()
if 'CONTROL ScriptBridge.ScriptBridge' in wordDocBuffer:
print 'use of MS Scriptlet detected'
listOCXContents = []
listOLEPaths = ole.listdir()
#find all OCXNAME streams in the word file
for path in listOLEPaths:
if path[len(path)-1] == '\x03OCXDATA':
listOCXContents.append('/'.join(x for x in path))
for content in listOCXContents:
OCXStream = ole.openstream(content)
contentBuffer = OCXStream.read()
if contentBuffer[0:16] == binaryClassID:
foundScripttlet = True
pathToSourceFile = ''
pathLength = littleEndian.readInt(contentBuffer, 18)
for character in range(22, 22+(pathLength*2), 2):
pathToSourceFile = pathToSourceFile + contentBuffer[character]
print 'path to source file: ', pathToSourceFile
OCXStream.close()
elif self.docType == '/xl':
excel_structures = imp.load_source('excel_structures', 'modules/OLE_parsing/excel_structures.py')
ws = excel_structures.workbook(ole)
foundScripttlet = ws.findScriptlets()
elif self.docType == '/ppt':
ppt_structures = imp.load_source('ppt_structures', 'modules/OLE_parsing/ppt_structures.py')
ppt_document_stream = ole.openstream('PowerPoint Document').read()
current_user_stream = ole.openstream('Current User').read()
ppt_scriptlet = ppt_structures.ppt_container(ppt_document_stream)
foundScripttlet = ppt_structures.findScriptlets(ppt_scriptlet)
if foundScripttlet:
folderName = os.path.abspath(self.fileName.split('.')[0])
if not os.path.exists(folderName):
os.makedirs(folderName)
externalOleObjectStorages = ppt_structures.findExternalOleObjectStorageLocation(current_user_stream, ppt_document_stream)
if not externalOleObjectStorages:
return
decompressedStorageFiles = ppt_structures.decompressExternalOleObjectStorage(folderName, ppt_document_stream, externalOleObjectStorages)
for oleStorageFile in decompressedStorageFiles:
currentStorage = OleFileIO_PL.OleFileIO(oleStorageFile)
if not currentStorage.exists('\x03OCXDATA'):
continue
OCXStream = currentStorage.openstream('\x03OCXDATA')
contentBuffer = OCXStream.read()
if contentBuffer[0:16] == binaryClassID:
foundScripttlet = True
pathToSourceFile = ''
pathLength = littleEndian.readInt(contentBuffer, 18)
for character in range(22, 22+(pathLength*2), 2):
pathToSourceFile = pathToSourceFile + contentBuffer[character]
print 'path to source file: ', pathToSourceFile
OCXStream.close()
currentStorage.close()
if not foundScripttlet:
print 'no Javascript/Scriptlett detected'
def __init__(self, binary):
self.ft = littleEndian.readShort(binary, 0)
self.cb = littleEndian.readShort(binary, 2)
self.guid = binary[4:20]
self.fSharedNote = littleEndian.readShort(binary, 20)
self.unused = littleEndian.readInt(binary, 22)
