Entry Info

• Date: 19.10.2025
• BGGP Challenge: 2 & 6
• Name: DeLuks
• Contact Info: deluks. (discord)
• Online Presence: -
• Writeup Link: tbd

File Info

• Target File Type: ELF + PDF + ZIP + RAR
• Target File Size: 479
• SHA256 Hash: 4f0ebfa8a0232e053a0221d2d45c73fe27160cd43b4fd43ec3d252fb15a7b4b6

File Contents

Please encode the file as Base64
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Environment Info

Target Software and Version

Arch: x86_64
Operating System: Linux
Distro: Arch Linux
Kernel: 6.16.8-arch3-1

Environment Setup

ELF:

On Linux x64_64, change the permissions of the file to be executable and run it with any 5 arguments and check the return value:

$ chmod +x entry.bin
$ ./entry.bin 6 6 6 6 6
$ echo $?
6

PDF:

On Linux, just open the file with zathura pdf viewer:

$ zathura entry.bin

RAR:

On Linux, run the following command to extract an empty file called "6":

$ rar e entry.bin

ZIP:

On Linux, run the following command to extract an empty file called "6":

$ unzip entry.bin

Additional Info