Everybody keeps in mind the Dirtyc0w Linux kernel bug. For those who don't, take some time to refresh your memory here.

The kernel race condition is triggered from user-space and can easily lead a random local user to write into any root owned file.

In this article, we will ...

During the short-presentations session, I had the opportunity to talk about REVEN, our Time-Traveling machine (applied for Software Reverse-Engineering and debugging). Until the video is available, you can have a look at my slides (20170618_recon17_REVEN.pdf) and imagine the live on-stage demo by watching some demos videos.

TETRANE is very ...

Last time, by abstracting the runtime effect of the first virtual machine, we have reduced the challenge to a simpler but semantically equivalent program. Its control flow graph has a unique entry point as the basic block starting at 0x402048, whereas ones at 0x4023d4 and at 0x40266e are exit points ...

In this article, we present a reverse engineering task performed using Reven. This is the full write-up corresponding to a first overview published in October. The binary examined here is F4b_XOR_W4kfu, the challenge scoring the highest number of points over all categories (cryptography, exploit, reverse engineering, etc.) in Grehack 2015 ...

In this post we'll try to reverse Windows 7 BSoD using REVEN Axion in order to generate an image from memory and port accesses.

Find which video mode is used

As a first step, we will need to know which video mode is used by the BSoD. To achieve ...

This article is the first one in a series of two. We present an overview of some reverse engineering capabilities of REVEN-Axion, applied to a publicly available challenge, namely F4b_XOR_W4kfu, the most valued at Grehack 2015's CTF contest (500 points). A more detailed write-up will be published soon for ...

Tetrane prenant de l'ampleur, il fallait que nos locaux fassent de même et s’adaptent à l’équipe en constante évolution. La facilité aurait pu nous pousser à déplacer nos bureaux à Lyon, mais comme expliqué dans un article passé, installer sa société dans une ville de province est ...

A quick update to tell you we've pushed recently our doxygen-powered user documentation on the new subdomain doc.tetrane.com.

It is regularly updated and fixed when necessary, so chances are it is more up-to-date that the shipped version. If you don't own the product though, it's ...

Since our activity and revenues are growing, we decided to open new job positions.

We have opened new C++ engineers positions, but that's not all. In fact we think we lack a certain role in our R&D team: we need a full-time reverser. There are several reasons we ...