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CSAW'21 CTF

Welcome

For this one, I joined the Discord and found the flag:

poem-collection

For this one, I went on the website and saw the following:

This led to another webpage:

Clicking on the links led to urls such as http://web.chal.csaw.io:5003/poems/?poem=poem1.txt and http://web.chal.csaw.io:5003/poems/?poem=poem2.txt. I then though about just replacing the poem text file with flag.txt. That did not work. However when I added "../" before the filename, I then got to a webpage. This led me to the flag:

Weak Password

For this problem, they gave us the name and the format for the wordlist. I then created a wordlist using those ideas: crunch 13 13 -t Aaron%%%%%%%% >> Aaron.txt. I then used hash-identifier to find out what kind of hash this is:

I then ran the hashcat command (hashcat -m 0 hash Aaron.txt) and got the flag:

Lazy Leaks

For this problem, we get a pcapng file. I ran strings on the file, and found the flag in the file: