CTF collection Vol.1.md

CTF collection Vol.1

https://tryhackme.com/room/ctfcollectionvol1

I can't hear English Hopelessly. 😢

Task 2 What does the base said?

Task 3 Meta meta

Task 4 Mon, are we going to be okay?

https://futureboy.us/stegano/decinput.html

Task 5 Erm......Magick

Task 6 QRrrrr

http://qrcode.red/

Task 7 Reverse it or read it?

Task 8 Another decoding stuff

Task 9 Left or right

Task 10 Make a comment

Task 11 Can you fix it?

https://hexed.it/

PNG file format 89 50 4E 47 0D 0A 1A 0A

Re write 8byte and save.

Task 12 Read it

Googled readit flag tryhackme site:reddit.com

5th site shows flag.

Task 13 Spin my head

Hint binaryfuck

https://github.com/Jomy10/Brainfuck-rs

Task 14 An exclusive!

https://www.dcode.fr/xor-cipher

Task 15 Binary walk

binwalk -e hell.jpg 

DECIMAL       HEXADECIMAL     DESCRIPTION
--------------------------------------------------------------------------------
0             0x0             JPEG image data, JFIF standard 1.02
30            0x1E            TIFF image data, big-endian, offset of first image directory: 8
265845        0x40E75         Zip archive data, at least v2.0 to extract, uncompressed size: 69, name: hello_there.txt
266099        0x40F73         End of Zip archive, footer length: 22
 cat _hell.jpg.extracted/hello_there.txt 
Thank you for extracting me, you are the best!

THM{***_****_**_***}

Task 16 Darkness

https://www.vector.co.jp/soft/win95/prog/se375830.html

Task 17 A sounding QR

Read QRcode and goto soundcloud. Listen the flag.

Task 18 Dig up the past

Task 19 Uncrackable!

Hint vigenere cipher

https://www.boxentriq.com/code-breaking/vigenere-cipher

Task 20 Small bases

$ python
>>> n = 581695969015253365094191591547859387620042736036246486373595515576333693
>>> h = hex(n)[2:]
>>> bytearray.fromhex(h).decode()
'THM{**_****_**_********_*****}'

Task 21 Read the packet

Follow HTTP stream.

Steganoはいまだうさみみハリケーン最強なきしてきたwww

Happy hacking. Thank you for your time 😄