c4ptur3-th3-fl4g

A beginner level CTF challenge

Task #1

c4n y0u c4p7u23 7h3 f149?

Understanding leet text shouldn’t be hard,and if you get stuck use Universal Leet (L337, L33T, 1337) Converter

Decrypted:

can you capture the flag

Task #2

01101100 01100101 01110100 01110011 00100000 01110100 01110010 01111001 00100000 01110011 01101111 01101101 01100101 00100000 01100010 01101001 01101110 01100001 01110010 01111001 00100000 01101111 01110101 01110100 00100001

Straight of this is binary code and to decode it you can either use pen and paper or use rapidTables to decode the text.

Decrypted:

lets try some binary out!

Task #3

MJQXGZJTGIQGS4ZAON2XAZLSEBRW63LNN5XCA2LOEBBVIRRHOM======

One easy way to crack ciphers of this type is look at the = in the end. From my observation Base64 encoding give =’s in the end. So we decode it to find the answer.

base32 is super common in CTF's

Task #4

RWFjaCBCYXNlNjQgZGlnaXQgcmVwcmVzZW50cyBleGFjdGx5IDYgYml0cyBvZiBkYXRhLg==

Looks like some base conversion more like base32.Let’s decode it with base32 for the answer.

Each Base64 digit represents exactly 6 bits of data.

Task #5

68 65 78 61 64 65 63 69 6d 61 6c 20 6f 72 20 62 61 73 65 31 36 3f

Pretty evident that is it is hexademical.Decoding this can be done with python,online decode or the boring pen and paper.

hexadecimal or base16?

Task #6

Ebgngr zr 13 cynprf!

The cipher here gives away the route ti decode it and it has to do with the integer 13 and use ROT-13 for the solve.

Rotate me 13 plac???

Task #7

*@F DA:? >6 C:89E C@F?5 323J C:89E C@F?5 Wcf E:>6DX

More like ROT-47 where we use symbols along with the letters and numbers.

You spin me right round baby right round (47 ??????

Task #8

- . .-.. . -.-. --- -- -- ..- -. .. -.-. .- - .. --- -.

. -. -.-. --- -.. .. -. --.

Pretty easy this is morse code.

telecommunication encod???

Task #9

85 110 112 97 99 107 32 116 104 105 115 32 66 67 68

ASCII and can be decoded using the ASCII table.

Unpack this B??

Task #10

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It is a combination of other ciphers for the final answer.You can use cyberchef or the sites mentioned below for the answer.

base64 > morse > binary > ROT47 > ASCII

Let's make this a bit trickier???

Sites for help

https://cryptii.com/

https://www.base64decode.net/

https://www.boxentriq.com/code-breaking/morse-code

https://www.rapidtables.com/convert/number/ascii-hex-bin-dec-converter.html

https://crackstation.net/

https://gchq.github.io/CyberChef/

https://emn178.github.io/online-tools/base32_decode.html

https://www.dcode.fr/rot-47-cipher

https://www.base64decode.org/

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

http://www.robertecker.com/hp/research/leet-converter.php

Tools used

steghide

strings

file

hexyl