by 31GHT_B!T (Sai Rohith Arra)
Hello Everyone, this is the write-up for the challenge created on WhatsApp on 04/04/2021.
If you enter the string in the above image, it redirects to the following page.
As written in the first and second images, the URL needs to be decoded. The hint says to decode the URL “/…………..” So, “l8v86” needs to be decoded. This can be decoded using the Rotate decryptor. As it contains numbers, ROT-5 can be used to decode the string.
Now enter the decoded string in the URL -> codeshare.io/xxxxx. It redirects to the following page
Yayyy! we made it to level 1, now we need to decode the string in the image to enter level 2. Let’s try Rotate 13 on that string.
Enter the decoded URL, it redirects to the following page (codeshare.io/xxxxxxxx) —
Whoop whoop! we made it to level 2. Now we need to decode the string in the image to enter the final level. Let’s try Rotate 47 on that string.
Enter the decoded URL, it redirects to the following page (codeshare.io/xxxxx) —
Yayyyy! we made it to the final level. It looks like the coupon code is encrypted. We need to decode it. There’s a clue in the image. Let’s decode the clue using Rotate 47.
Let’s open the Twitter page to find the hint.
There’s a key here with a blank. Let’s google it and fill that blank.
So, the key is “xxx”. Now let’s go to the previous page where we have encoded coupon code (https://codeshare.io/xxxxx) and decode it using “Vigenere cipher”
Whoop whoop! Finally, we got the coupon code.
PS: If you’re confused to use which cipher/decryption algorithm to use, just google the encrypted string to identify the cipher type.
