2025from public repositories
Secure Firewall 2025
1 challenge with 1 published solution between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.
Where these writeups liveSteganography1
Find the payload hidden inside a carrier that looks ordinary. Bit planes, appended data, metadata, and audio spectrograms.
Solve it with:LSB steganography extractorPNG chunk analyzerAudio spectrogram and SSTV decoderZero-width character and text steganography decoderLearn: Steganography
Firewall
1 official solutionAlso written up in: ULYSSIS-KUL/ulyssisctf-writeups