Please Don't Double Click Batch Files: Cal Poly FAST CTF Challenge 10

File: file10.bat https://github.com/mfput/CTF-Questions/raw/master/file10.zip

Question: The flag is inside this Windows Batch file.

Hint: Strings is faster than restarting your computer.

Answer: fastctf{editnotopen}

This challenge was very easy. All you had to do was read the batch file. Now if the batch file was executed, it would have shutdown your computer in 5 seconds and caused a pop-up to say “You’re in CIS and you execute random batch scripts?”.

Obviously this is quite malicious and hilarious. Don’t execute batch scripts without inspecting them first! Using any text editor will show the flag fastctf{editnotopen}. You could have also used strings on the file. The “::” represents a comment and is not shown when executed.

I found it hilarious when people just double clicked the file and shutdown their computer. One person who turned off their computer thought it was their computer glitching out, so they asked a team member to try it. Hahaha~