As we are challenging myself in picoGym, here is the guide on how to get the answer.

The hints are very helpful.

Obedient Cat

Click the picoCTF web shell.

Download:

wget https://mercury.picoctf.net/static/217686fc11d733b80be62dcfcfca6c75/flag

Check the file:

ls -li

See the file:

cat flag

Copy the answer – picoCTF{xxx} and post it into the field submit.

Wave a flag

Click the picoCTF web shell.

Download:

wget https://mercury.picoctf.net/static/a14be2648c73e3cda5fc8490a2f476af/warm

Check the file:

ls -li

Change the permission to executable:

chmod +x warm

Run:

warm -h

Copy the answer – picoCTF{xxx} and post it into the field submit.

Mod 26

Open up browser: www.rot13.com

Enter the info:

cvpbPGS{arkg_gvzr_V'yy_gel_2_ebhaqf_bs_ebg13_MAZyqFQj}

Click the ROT13 button.

Copy the answer – picoCTF{xxx} and post it into the field submit.

Python Wrangling

Click the picoCTF web shell.

Download:

wget https://mercury.picoctf.net/static/8e33ede04d02f3765b8c6a6e24d72733/ende.py
wget https://mercury.picoctf.net/static/8e33ede04d02f3765b8c6a6e24d72733/pw.txt
wget https://mercury.picoctf.net/static/8e33ede04d02f3765b8c6a6e24d72733/flag.txt.en

Open the pw.txt to get the password:

cat pw.txt

Run:

python ende.py

This will show you how to use this file. -e is encrypted and -d is decryped.

python ende.py -d flag.txt.en

Enter the password based on pw.txt

Copy the answer – picoCTF{xxx} and post it into the field submit.

Credits

Photo by Pixabay: https://www.pexels.com/photo/blur-bright-business-codes-207580/