Ludovic COULON - Cybersecurity blog

Cicada-3301 Vol-1 - TryHackMe

TryHackMe | Cicada-3301 Vol-1

Web Browsers are useless here

Welcome.

Good Luck

-3301

https://pastebin.com/wphPq0Aa

Welcome.

Good Luck.

-3301

Use various encryption methods and ciphers to decode the passphrase and access the metadata of Welcome.jpg

#1 Find and Decrypt the passphrase and key

No answer needed

#2 What is the decrypted passphrase?

Passphrase: SG01Ul80X1A0NTVtaHA0NTMh
Key: Q2ljYWRh
❯ echo SG01Ul80X1A0NTVtaHA0NTMh | base64 -d
Hm5R_4_P455mhp453!%

#3 What is the decrypted key?

❯ echo Q2ljYWRh | base64 -d
Cicada

#4 Still looks funny? Find and use a cipher along with the key to decipher the passphrase

No answer needed

#5 What is the final passphrase

Ju5T_4_P455phr453!

Good Luck

-3301

Use Steganography tools to gather metadata from Welcome.jpg as well as find the hidden message inside of the image file.

#1 Using the found passphrase along with Stego tools find the secret message

No answser needed
➜  TryHackMe steghide extract -sf welcome.jpg
Enter passphrase:
wrote extracted data to "invitation.txt".
➜  TryHackMe cat invitation.txt
https://imgur.com/a/c0ZSZga
➜  TryHackMe

I am surprised you have made it this far…

I doubt you will make it any further.

-3301

Use Stego tools to find the hidden files inside of the image

https://github.com/crorvick/outguess

#1 Using stego tools find the hidden file inside of the image

No answser needed

#2 What tool did you use to find the hidden file

➜  TryHackMe outguess -r 8S8OaQw.jpg bope
Reading 8S8OaQw.jpg....
Extracting usable bits:   29035 bits
Steg retrieve: seed: 38, len: 1351
➜  TryHackMe cat bope
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Welcome again.

Here is a book code.  To find the book, break this hash:

b6a233fb9b2d8772b636ab581169b58c98bd4b8df25e452911ef75561df649edc8852846e81837136840f3aa453e83d86323082d5b6002a16bc20c1560828348

I:1:6
I:2:15
I:3:26
I:5:4
I:6:15
I:10:26
/
/
I:13:5
I:13:1
I:14:7
I:3:29
I:19:8
I:22:25
/
I:23:-1
I:19:-1
I:2:21
I:5:9
I:24:-2
I:22:1
I:38:1

Good luck.

3301

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
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=Ybd6
-----END PGP SIGNATURE-----
➜  TryHackMe

We have one last challenge to find our individuals

Find the last clue, crack the hash, decipher the message

Good Luck

-3301

Use Hash cracking tools to reveal the text to the text

Use methods like Cicada to decipher the message

Hash sha512: b6a233fb9b2d8772b636ab581169b58c98bd4b8df25e452911e

#1 Crack the Hash

No answser needed

#2 What is the Hash type?

➜  TryHackMe hash-identifier
   #########################################################################
   #     __  __                     __           ______    _____           #
   #    /\ \/\ \                   /\ \         /\__  _\  /\  _ `\         #
   #    \ \ \_\ \     __      ____ \ \ \___     \/_/\ \/  \ \ \/\ \        #
   #     \ \  _  \  /'__`\   / ,__\ \ \  _ `\      \ \ \   \ \ \ \ \       #
   #      \ \ \ \ \/\ \_\ \_/\__, `\ \ \ \ \ \      \_\ \__ \ \ \_\ \      #
   #       \ \_\ \_\ \___ \_\/\____/  \ \_\ \_\     /\_____\ \ \____/      #
   #        \/_/\/_/\/__/\/_/\/___/    \/_/\/_/     \/_____/  \/___/  v1.2 #
   #                                                             By Zion3R #
   #                                                    www.Blackploit.com #
   #                                                   Root@Blackploit.com #
   #########################################################################
--------------------------------------------------
 HASH: b6a233fb9b2d8772b636ab581169b58c98bd4b8df25e452911ef75561df649edc8852846e81837136840f3aa453e83d86323082d5b6002a16bc20c1560828348

Possible Hashs:
[+] SHA-512
[+] Whirlpool

Least Possible Hashs:
[+] SHA-512(HMAC)
[+] Whirlpool(HMAC)

https://pastebin.com/6FNiVLh5

#4 Decipher the message

No answser needed

For this response its a bit tricky to find out, the fist number is equal to the number on the paste-bin and the second one is for the number of the character on the line

https://pastebin.com/raw/6FNiVLh5 # The paste-bin decoded before

I:1:6 = h # Exemple = Number 1, character number 6
I:2:15 = t
I:3:26 = t
I:5:4 = p
I:6:15 = s
I:10:26 = :
/ = /
/ = /
I:13:5 = b
I:13:1 = i
I:14:7 = t
I:3:29 = .
I:19:8 = l
I:22:25 = y
/ = /
I:23:-1 = 3
I:19:-1 = 9
I:2:21 = p
I:5:9 = w
I:24:-2 = 2
I:22:1 = N
I:38:1 = H
https://bit.ly/39pw2NH
https://soundcloud.com/user-984804993/the-instar-emergence

We have found the individuals we sought

-3301

SoundCloud Downloader

#1 What is the song linked?

The Instar Emergence