More Crypto - CTF21
CTF Name: More CryptoTopic: Cryptography
Level: Beginner
Flag Format: IHC_CTF{}
CTF Link: https://t.me/ctf_invisiblehc/36
Description:
Cryptography is the main security weapon in our life. Without it, one cannot think of security in tech life.
If you have any problem try @invisiblehc
Solution:
We got a text file with the challenge. When we opened it, we saw a Cipher text. After decoding it with CyberChef, we found a text:
Go to this link: https://drive.proton.me/urls/12K0EQJ0X8#0Fu89z1YdwYU
Need password? I gave you the password. Forgot? Then go back again.
clicking on the link, the website asked for a password. After carefully reading the description, we deduced that "@invisiblehc" might be the password. We tried that and the
successfully opening the URL that led us to a fake flag, but it was tricky! It was actually hidden 0 width characters. We used this website: https://www.irongeek.com/i.php?page=security/unicode-steganography-homoglyph-encoder to reveal the real flag.
After this, we finally found the real flag and solved the challenge.
flag: IHC_CTF{7H15_15_7H3_F149_dsfkhh}
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