TFCCTF2021 — OCEAN [Forensic]

Description : What can you do in an ocean of files?

connect : nc 34.65.54.58 1338

Solves : 61

First, connect using nc and we will get a shell, checking current directory but nothing there

read the description, i think “ocean of files” is a hint, so what should i do is find some interesting file and directory, so i run this command to list all directory and file

we can see some interesting file on /bin/what/, filename of each file like flag format

Look at the filename, its number start from 0, so we can list file sorted numerically to fix flag

then, copy the output of list and put the flag manually using sublime xD and we got the flag

flag : TFCCTF{Ju5t_k33p_5w1mm1ng}

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