`Balbuzard <http://www.decalage.info/python/balbuzard>`_ is a package of
malware analysis tools in python to extract patterns of interest from
suspicious files (IP addresses, domain names, known file headers,
interesting strings, etc). It can also crack malware obfuscation such as
XOR, ROL, etc by bruteforcing and checking for those patterns.
`Download <http://bitbucket.org/decalage/balbuzard/downloads>`_ -
- `Documentation <https://bitbucket.org/decalage/balbuzard/wiki>`_ -
`Contact <http://www.decalage.info/contact>`_ - `Report
- `Updates on Twitter <https://twitter.com/decalage2>`_
- `balbuzard <https://bitbucket.org/decalage/balbuzard/wiki/balbuzard/>`_
is a tool to extract patterns of interest from malicious files, such
as IP addresses, URLs, embedded files and typical malware strings. It
is easily extensible with new patterns, regular expressions and Yara
- `bbcrack <https://bitbucket.org/decalage/balbuzard/wiki/bbcrack/>`_
uses a new algorithm based on patterns of interest to bruteforce
typical malware obfuscation such as XOR, ROL, ADD and various
combinations, in order to guess which algorithms/keys have been used.
- `bbharvest <https://bitbucket.org/decalage/balbuzard/wiki/bbharvest/>`_
extracts all patterns of interest found when applying typical malware
obfuscation transforms such as XOR, ROL, ADD and various
combinations, trying all possible keys. It is especially useful when
several keys or several transforms are used in a single file.
- `bbtrans <https://bitbucket.org/decalage/balbuzard/wiki/bbtrans/>`_
can apply any of the transforms from bbcrack (XOR, ROL, ADD and
various combinations) to a file.
When to use these tools:
- If you need to analyze a new malicious file, you can first try
to extract strings/patterns of interest and detect embedded files in
- Then if you think the malicious file might use an obfuscation
algorithm such as XOR to hide interesting data (e.g. an embedded
executable file), try
to find the algorithm and the key(s).
- Alternatively, if bbcrack is not successful, or if you think the file
may use several algorithms and/or keys, try
bbharvest is especially targeted at single strings obfuscated within
an executable or malicious file.
5 minutes demo
See the `Demo <https://bitbucket.org/decalage/balbuzard/wiki/Demo/>`_
page to see examples and test the tools by yourself in a few minutes
using the provided samples.
- if you have malware samples or malicious documents with known
obfuscation algorithms such as XOR, please `contact
me <http://www.decalage.info/contact>`_. That will help me a lot to
improve bbcrack and bbharvest.
- if you know other strings, patterns, file headers useful for malware
analysis that Balbuzard should support, or other obfuscation
algorithms, please `contact me <http://www.decalage.info/contact>`_.
See http://www.decalage.info/python/balbuzard for more info and other
Follow all updates and news on Twitter: https://twitter.com/decalage2
- 2014-03-23 v0.19: bugfix when Yara is not installed, improved
- 2014-02-26 v0.18: Initial release of Balbuzard tools
- 2013-03-15: added harvest mode (bbharvest)
- 2011-05-06: added bruteforce functions (bbcrack)
- 2008-06-06: first public release as
`reScan <http://decalage.info/rescan>`_ for
- 2007-07-11: first versions of reScan
- see changelog in source code for more info.
The archive is available on `the project page on
See the `installation
How to contribute / report bugs / ask for help:
These are open-source tools developed on my spare time. Any contribution
such as code improvements, ideas, bug reports, additional patterns or
transforms would be highly appreciated. You may contact me using `this
online form <http://www.decalage.info/contact>`_, by e-mail (decalage at
laposte.net) or use the `issue page on
to report bugs/ideas, or clone the project then send me pull requests to
This license applies to the whole Balbuzard package including balbuzard,
bbcrack, bbharvest and bbtrans, apart from the thirdparty and plugins
folders which contain third-party files published with their own
The Balbuzard package is copyright (c) 2007-2014, 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
- 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.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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