Entry Info

• Date: 22.10.2025
• BGGP Challenge: 6
• Name: dominikr
• Contact Info: Discord dominikr, github dominikfhnw
• Online Presence: -
• Writeup Link: https://gist.github.com/dominikfhnw/5cf86ce2c7b539a910f6c26307d0a5ab

File Info

• Target File Type: ELF/Linux x86 32bit
• Target File Size: 45 bytes
• SHA256 Hash: 2d5acb305a11b6d3d88c9f3e1523e3d10ef90a1e3790aed3962ebd488d415b04

File Contents

f0VMRgEAAAA2CgAANroEaAIAAwAZsARoGbAEaAQAAAC5CLAEaFrNgOv+IAAB

Environment Info

Target Software and Version

Linux x86 32bit (or 64bit w/32bit support enabled)

Environment Setup

No external dependencies needed. Should work with any x86/x64 Linux kernel that supports the ELF executable format.

Put content in a file and make it executable (i.e. chmod +x ./e). Filename does not matter. Execute it in the terminal with ./e.

Additional Info

Expected output:

$ ./e
6

Program does not automatically exit after printing. Press Ctrl+C to exit.

STDIN must be a TTY for the program to work. This should be the case if the program is started in a terminal session as described above. More about this weird requirement will follow in the writeup.