Challenge 3: Wave a flag

Description

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

Tags

picoCTF 2021 General Skills

Points

10

Solution

we get a file called warm that is a binary file. we need to make it executable by running chmod +x warm. if we run the file, we get the following message:

$ ./warm
Hello user! Pass me a -h to learn what I can do!

as we can see, the file takes the -h argument to show the help message. if we run the file with the -h argument, we get the following message:

$ ./warm -h
Oh, help? I actually don't do much, but I do have this flag here:\ 
picoCTF{b1scu1ts_4nd_gr4vy_f0668f62}

as we can see, the file shows the flag.

Flag

picoCTF{b1scu1ts_4nd_gr4vy_f0668f62}