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PicoCTF2018 - Miscellaneous - Pipe

PicoCTF2018 - Miscellaneous - Pipe



Objective:

 During your adventure, you will likely encounter a situation where you need to process data that you receive over the network rather than through a file. Can you find a way to save the output from this program and search for the flag? Connect with 2018shell.picoctf.com 44310

Solution:



Let's get on the shell



let's try just netcat to the port listed



wow it is just sending a bunch of text lines that say stuff like this



is not a flag                                                                                                       
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
This is not a flag                                                                                                       
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
Unfortunately this is also not a flag                                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
This is not a flag                                                                                                       
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
This is not a flag                                                                                                       
This is not a flag                                                                                                       
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
Unfortunately this is also not a flag                                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
Unfortunately this is also not a flag                                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag                                                                                                       
This is not a flag                                                                                                       
This is not a flag                                                                                                       
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
I'm sorry you're going to have to look at another line                                                                   
Unfortunately this is also not a flag                                                                                   
This is not a flag                                                                                                       
I'm sorry you're going to have to look at another line                                                                   
I'm sorry you're going to have to look at another line                                                                   
This is not a flag       




ok so  I assume at some point the actual flag gets passed to the netcat

let's pipe it through grep and see what comes back



@pico-2018-shell:~$ nc 2018shell.picoctf.com 44310 | grep 'pico'                                             
picoCTF{almost_like_mario_a13e5b27}                       
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