// resources
Resources
PDFs, exercises, challenges and other content.
// challenges
Contributed to zitf.fr ↗Reverse engineering challenges created for ZITF , a CTF competition.
Brainless 1 - 2025
Leaper has developed this program so that no-one can ever debug it. Will you be able to do it ?
Brainless 2 - 2026
They say he tried to erase his tracks. What he really erased was his mind. A binary with no logic, a puzzle with no key. No symbols, no names—just noise, chaos, and you. If you can still hear your thoughts, you’re not deep enough yet.
SkyWalker - 2026
Our sandbox analyzed a suspicious binary. The sandbox, based on Xen, uses a Virtual Machine Introspection mechanism to monitor processes in real time. During the analysis, our system detected a memory allocation by the process.
Before we could extract the generated data, the binary caused the virtual machine to crash. Fortunately, our VMI infrastructure allowed us to extract a few artifacts: walker.exe (the suspicious binary), MEMORY.DMP (kernel crash dump generated at the time of the crash), partial_ram.raw (raw memory extract), sandbox.log (VMI log extract).
The data is somewhere in memory.