picoCTF 2021 | Magikarp Ground Mission

Workstation
Virtual Box	VMware Fusion 12.1.1
OS	kali-linux-2021.01

Hint

1. Finding a cheatsheet for bash would be really helpfull

Start Instance

Connect ssh

$ sudo ssh ctf-player@venus.picoctf.net -p 51959
The authenticity of host '[venus.picoctf.net]:51959 ([3.131.124.143]:51959)' can't be established.
ECDSA key fingerprint is SHA256:NrQkIxNEQQho/GA7jE0WlIa7Jh4VF9sAvC5awkbuj1Q.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '[venus.picoctf.net]:51959,[3.131.124.143]:51959' (ECDSA) to the list of known hosts.
ctf-player@venus.picoctf.net's password: 
Welcome to Ubuntu 18.04.5 LTS (GNU/Linux 5.4.0-1041-aws x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
This system has been minimized by removing packages and content that are
not required on a system that users do not log into.

To restore this content, you can run the 'unminimize' command.

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

ctf-player@pico-chall$ ls
1of3.flag.txt  instructions-to-2of3.txt
ctf-player@pico-chall$ cat 1of3.flag.txt 
picoCTF{xxsh_
ctf-player@pico-chall$ cat instructions-to-2of3.txt 
Next, go to the root of all things, more succinctly `/`
ctf-player@pico-chall$ cd /
ctf-player@pico-chall$ ls
2of3.flag.txt  boot  etc   instructions-to-3of3.txt  lib64  mnt  proc  run   srv  tmp  var
bin            dev   home  lib                       media  opt  root  sbin  sys  usr
ctf-player@pico-chall$ cat 2of3.flag.txt 
0ut_0f_\/\/4t3r_
ctf-player@pico-chall$ cat instructions-to-3of3.txt 
Lastly, ctf-player, go home... more succinctly `~`
ctf-player@pico-chall$ cd ~
ctf-player@pico-chall$ ls
3of3.flag.txt  drop-in
ctf-player@pico-chall$ cat 3of3.flag.txt 
c1754242}
ctf-player@pico-chall$ 

 

Flag : picoCTF{xxsh_0ut_0f_\/\/4t3r_c1754242}