Challenge Overview
Another program, but this time, it seems to want some input.
What happens if you try to run it on the command line with
input "Hello!"?
Download the program here.
Solution
wget https://artifacts.picoctf.net/c/155/run
This is very similiar to file-run1, but the only differance is you are passing in an argument to the executable.
After running sudo chmod +x run to change the permissions you can try running ./run but it will tell you that it wants an argument.
If you do anything other than "Hello!" as specified in the description like ./run hello it will ask you to say "Hello!".
Once you put in the correct argument, ./run Hello!, then you will get the flag.
If you wanted just the flag and nothing else you can use cut with a space as the delimeter and looking at the fourth field.
./run Hello! | cut -d " " -f4
Flag: picoCTF{F1r57_4rgum3n7_be07...}