Warmup : Test (0)
In this challenge the flag is already provided just copy paste the flag.
The Flag Is : VIITCTF{flag}
OSINT : Find Me(5)
This link was provided in the challenge https://vignanvizag.acm.org/
when visiting the source code I found this path :
events/viit_ctf/viit_ctf_v3.html
Upon navigating to this path and looking around, I found the flag hidden in chunks in the source code.
The Flag Is: VIITCTF{you_found_m3}
OSINT : Socialize(5)
As the name of the challenge indicates “Socialize” so, I assumed it’s related to social media. I clicked on the Author’s name in the challenge and was redirected to his twitter account.
Here I found his website’s URL https://deathflash.ml/.
Upon navigating to his website and looking around, I found the Instagram link ( https://www.instagram.com/deathflash1411/ ) where his bio contains the flag.
The Flag Is : VIITCTF{Ez_Pz_R3c0n}
OSINT : Robots(5)
As the name of the challenge indicates “Robots” the first thing that came to my mind was robots.txt file.
A robots.txt file tells search engine crawlers which pages or files the crawler can or cannot access.
The Flag Is : VIITCTF{robots_cant_but_you_can}
OSINT : Recon(20)
As the challenge description says I have to find the real IP address behind the defmax.io cloudflare so, I started with some commands like dig but was no use.
Then I searched for defmax.io in this website.
Here I found the IP address.
The Flag Is : VIITCTF{13.127.33.132}
Crypto : Shift em up (5)
As the Hint says “Keep shifting them” the first thing that came to my mind is Caesar Cipher because it based on an alphabet shift. I used dcode.fr this is an awesome site which I prefer mostly alongside CyberChef
The Flag Is : VIITCTF{caesar_eraser}
Crypto : Fcuk(5)
As the name of the file indicates it may be JSfuck.
The file contain :
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used JSfuck decoder on dcode.fr to run this.
The decoded string is : return”\126IITCTF{Sure}”
I used Python interpreter to get the output of the return statement.
def fun():
return"\126IITCTF{Sure}"
fun()Output : VIITCTF{Sure}
The Flag Is : VIITCTF{Sure}
Crypto : Square(10)
As name suggest “Square” it may be related to polybious square cipher.
I used this site to decode this. Here I entered the cipher and changed the settings to include foreign characters.
Here I got the flag.
The Flag Is : VIITCTF{hell0_w0rld}
Stego : Base(5)
The file provided in the challenge contains multiple times base32 encoded data. I used base32 decoder to decode this.
base32 -d hash.txt | basse32 -d | base32 -d
Upon decoding I found raw data of a png file which can be confirmed with the headers. I saved this output in a png file.
base32 -d hash.txt | bash32 -d | bash32 -d > hash.png
The Flag Is : VIITCTF{bas3_3m_4ll}
Reverse : Pass(10)
This was the only one Reversing Challenge in this CTF.
I analysed the binary using radare2.
I seeked to the main function inside radare2 and printed the disassembly of the function.
There I found one cmp instruction which compares eax with the 0x583.
If the condition is true it provide the flag so, The decimal value of 0x583 is 1411.
I Ran the binary with the pin 1411 and got the flag.
