soal

There’s an interesting script in the user’s home directory
The work computer is running SSH.
We’ve been given a script which performs some basic calculations, explore the script and find a flag.

launch istance

Hostname: saturn.picoctf.net
Port: 63565
Username: picoplayer
Password: password

solve

ssh picoplayer@saturn.picoctf.net -p 63565
# picoplayer@saturn.picoctf.net's password:

ls
# useless
./useless
# Read the code first

man useless
# Authors
#      This script was designed and developed by Cylab Africa
#      picoCTF{us3l3ss_ch4ll3ng3_3xpl0it3d_6194}

flag

picoCTF{us3l3ss_ch4ll3ng3_3xpl0it3d_6194}