Posts

With Python 2.6+, that's quite simple: print "{0:b}".format(i) ...

Here is a collection of short articles I have written about how to do many useful things in Python. ...

This article explains how many common file formats (DOC, XLS, PDF, HTML, XML, RTF, ...) may hide or trigger malicious code (virus, Trojan horse, ...) using their native features such as active content (macros, Javascript, etc). It was presented at the SSTIC symposium and OSSIR in 2003. ...

This article explains how many common file formats (DOC, XLS, PDF, HTML, XML, RTF, ...) may hide or trigger malicious code (virus, Trojan horse, ...) using their native features such as active content (macros, Javascript, etc). It was presented at the SSTIC symposium and OSSIR in 2003. This article focuses on all files that can enter a company network by many different means (web, e-mail, USB sticks, CDs, laptops, etc), most of the time without being properly filtered. Once a file is opened by a user, it can easily trigger malicious actions and put the network's security at risk. ...

On the 29 March 2010, Didier Stevens revealed in his blog that he found a way to launch an executable file stored in a PDF document, without using any JavaScript or buffer overflow. This short article shows how ExeFilter can be used to sanitize such PDF files to block this type of attack. ...

This is a series of articles about file formats and related security issues. In 2003 I had presented an article in French about this subject at the SSTIC conference: [SSTIC03]. In the following articles I will provide an updated version in English with more information about common file formats. ...

This is a Python course I have written to quickly teach Python to my colleagues and students, made of slides and samples for hands-on exercises. ...

This short article shows how ExeFilter can be used to disable JavaScript in PDF files, which is effective against many Adobe Reader exploits discovered in 2009, including the recent zero-day CVE-2009-4324. ...