python-oletools is a package of python tools to analyze Microsoft OLE2 files (also called Structured Storage, Compound File Binary Format or Compound Document File Format), such as Microsoft Office documents or Outlook messages, mainly for malware analysis and debugging. It is based on the OleFileIO_PL parser. See http://www.decalage.info/python/oletools for more info.
Note: python-oletools is not related to OLETools published by BeCubed Software.
Tools in python-oletools:
- olebrowse: A simple GUI to browse OLE files (e.g. MS Word, Excel, Powerpoint documents), to view and extract individual data streams.
- pyxswf: a script to detect, extract and analyze Flash objects (SWF) that may be embedded in files such as MS Office documents (e.g. Word, Excel), which is especially useful for malware analysis.
- and a few others (coming soon)
- 2012-10-09: Initial version of olebrowse and pyxswf
- see changelog in source code for more info.
The archive is available on the project page.
A simple GUI to browse OLE files (e.g. MS Word, Excel, Powerpoint documents), to view and extract individual data streams.
Usage: olebrowse.py [file]
If you provide a file it will be opened, else a dialog will allow you to browse folders to open a file. Then if it is a valid OLE file, the list of data streams will be displayed. You can select a stream, and then either view its content in a builtin hexadecimal viewer, or save it to a file for further analysis.
For screenshots and other info, see http://www.decalage.info/python/olebrowse
pyxswf is a script to detect, extract and analyze Flash objects (SWF files) that may be embedded in files such as MS Office documents (e.g. Word, Excel), which is especially useful for malware analysis.
pyxswf is an extension to xxxswf.py published by Alexander Hanel.
Compared to xxxswf, it can extract streams from MS Office documents by parsing their OLE structure properly, which is necessary when streams are fragmented. Stream fragmentation is a known obfuscation technique, as explained on http://www.breakingpointsystems.com/resources/blog/evasion-with-ole2-fragmentation/
For this, simply add the -o option to work on OLE streams rather than raw files.
Usage: pyxswf.py [options] <file.bad> Options: -o, --ole Parse an OLE file (e.g. Word, Excel) to look for SWF in each stream -x, --extract Extracts the embedded SWF(s), names it MD5HASH.swf & saves it in the working dir. No addition args needed -h, --help show this help message and exit -y, --yara Scans the SWF(s) with yara. If the SWF(s) is compressed it will be deflated. No addition args needed -s, --md5scan Scans the SWF(s) for MD5 signatures. Please see func checkMD5 to define hashes. No addition args needed -H, --header Displays the SWFs file header. No addition args needed -d, --decompress Deflates compressed SWFS(s) -r PATH, --recdir=PATH Will recursively scan a directory for files that contain SWFs. Must provide path in quotes -c, --compress Compresses the SWF using Zlib
Example - detecting and extracting a SWF file from a Word document on Windows:
C:\oletools>pyxswf.py -o word_flash.doc OLE stream: 'Contents' [SUMMARY] 1 SWF(s) in MD5:993664cc86f60d52d671b6610813cfd1:Contents [ADDR] SWF 1 at 0x8 - FWS Header C:\oletools>pyxswf.py -xo word_flash.doc OLE stream: 'Contents' [SUMMARY] 1 SWF(s) in MD5:993664cc86f60d52d671b6610813cfd1:Contents [ADDR] SWF 1 at 0x8 - FWS Header [FILE] Carved SWF MD5: 2498e9c0701dc0e461ab4358f9102bc5.swf
For more info, see http://www.decalage.info/python/pyxswf
How to contribute:
The code is available in a Mercurial repository on bitbucket. You may use it to submit enhancements or to report any issue.
If you would like to help us improve this module, or simply provide feedback, you may also send an e-mail to decalage(at)laposte.net.
How to report bugs:
To report a bug or any issue, please use the issue reporting page, or send an e-mail with all the information and files to reproduce the problem.
This license applies to the python-oletools package, apart from the thirdparty folder which contains third-party files published with their own license.
The python-oletools package is copyright (c) 2012, Philippe Lagadec (http://www.decalage.info) All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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