Wave a Flag

Category - General Skills

Author - SYREAL

Description:

Can you invoke help flags for a tool or binary? This program has extraordinarily helpful information...

Solution:

The challenge gives us a link to download a 64-bit ELF Executable file named "warm". Trying to run it with:

./warm

in a linux terminal gives us this output:

Hello user! Pass me a -h to learn what I can do!

Passing in a "-h" to the program as it asked us to do gives us a different output with the flag. Final command:

./warm -h

Flag:

picoCTF{b1scu1ts_4nd_gr4vy_30e77291}

Original writeup (https://github.com/ZeroDayTea/PicoCTF-2021-Killer-Queen-Writeups/blob/main/GeneralSkills/WaveAFlag.md).