RaziCTF 2020 Writeups

SYS_DATE: 2020-10-29 00:00 | SIZE: 191 words
#OSINT #Forensics #Cryptography #Steganography

RaziCTF-Writeups

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Holloway

Holloway

OSINT

Challenge

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Solution

following the provided challenge link

https://dikelaw535.wixsite.com/holloway we are met with the following web page

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that ain’t good :/ no Secrets yet … hh but again maybe it was there but deleted :) checking through using Wayback Machine we get something

screenshot3.png a twitter handle @juliusKingsleyy following the link

https://twitter.com/juliusKingsleyy

we are met with the following page, just a weird looking tweet

screenshot4.png

aha!

the challenge name is a hint for Twitter Steganography technique. we decode the tweet using the site holloway.nz/steg/

and there we get our flag

screenshot5.png

Flag : RaziCTF{secret1337}

A rEal gAME

Crypto

Challenge

screenshot1.png

Solution

the challenge description has 2 provided hints fence and bifid

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provided the cipher we try decoding it with “Rail Fence Cipher” … Then decode the Results with “Bifid Cipher” with the provided key “RaziCTF”

screenshot4.png

screenshot5.png

and there we get our flag

Ladder

Crypto

Challenge

screenshot1.png

Solution

opening the file in Cyberchef CyberChef

and decoding through base32»base58»base62»base64»base85 we get the flag file.png

Culture

Steganography

Challenge

screenshot1.png

Solution

we are provided with a challenge png file screenshot2.png since it’s a png i decided to check through zsteg and we get our flag screenshot5.png

and there we get our flag