CTF Writeup by Frigyes
Introduction
This challenge was originally featured on picoCTF 2019
Description: Sometimes you need to handle process data outside of a file. Can you find a way to keep the output from this program and search for the flag? Connect to address port
Solution
By connecting with netcat, we are greeted with a 10002 line output. The key is somewhere in there.
Now we could be lame and redirect the output to a file, and search it from GUI, but we are hardcore CLI users here, right? So I just piped the output to grep with the pipe character “|”, and looked for “picoCTF{” pattern:
An there we go, we have a flag!
picoCTF{digital_plumb3r_ea8bfec7}
If you liked this writeup, check out other writeups I wrote!
