Strace Lab

This lab gives hands on exercises to experiment with the strace utility. The corresponding presentation was given virtually at DEF CON 2021's Packet Hacking Village.

Requirements

• Linux host (tested on Ubuntu 20.04)
• Required packages gcc, make and strace (sudo apt-get install gcc make strace)

Building

• make

Challenges

0. Experiment with challenges 1-3 from the video for hands on experience.
1. Without looking at the source, discover why challenge_4.bin is difficult to trace.
2. challenge_5.bin was given to you by a developer to test. What's a key detail they left out that this binary requires?
3. How can you inject via strace to make challenge_5.bin run?
4. Build a tool to take the hex dump from the write syscall and make the ELF from challenge_3.bin recoverable.