DownUnderCTF 2024

I've learned that if you shuffle your text, it's elrlay hrda to tlle htaw eht nioiglra nutpi aws.

Find the text censored with question marks in output_censored.txt and surround it with DUCTF{}.

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Author: hashkitten

The MAG cipher was a fast stream cipher algorithm submitted to the eSTREAM project of the eCRYPT network. It was not selected for consideration in the second phase, as further cryptanalysis revealed a number of vulnerabilities including a distinguisher, partial-key recovery and in some variants a full key recovery. This challenge implements a weaker version of the MAG cipher with some security features removed.

Funnily enough, the wikipedia article got deleted just as I was writing this challenge due to a lack of notability.

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Author: wednesday

They've been trying to breach our infrastructure all morning! They're trying to get more info on our covert kangaroos! We need your help, we've captured some traffic of them attacking us, can you tell us what tool they were using and its version?

NOTE: Wrap your answer in the DUCTF{}, e.g. DUCTF{nmap_7.25}

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Author: Pix

Those monsters! They've kidnapped the Quokkas! Who in their right mind would capture those friendly little guys.. We've managed to intercept a CCIR476 transmission from the kidnappers, we think it contains the location of our friends! Can you help us decode it? We managed to decode the first two characters as '##'

NOTE: Wrap the decoded message in DUCTF{}.

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Author: Pix

Our Cyber Chef has been creating some wacky recipes recently, though he has been rather protective of his secret ingredients. Use this Chicken Parmi recipe and decipher the missing values to discover the chef's secret ingredient!

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Author: TurboPenguin & joseph

An adorable animal was encrypted with this program! A flag too, I guess.

NOTE: aea and libAppleArchive.dylib are provided for your convenience. They are taken without modification from the macOS system that ran the binary.

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Author: Joseph

Editor's NOTE: aea.tar.gz the original zip is provided but we have set up the necessary files in the aea folder.

We received a coded message from a parallel version of New Zealand. We also have a copy of the encoder they used to make the message.

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Author: @jscarsbrook and @pix