2023from public repositories
Cyber Siege 2023
4 challenges with 4 published solutions 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 liveOSINT2
Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.
Breton OSINT
1 official solutionAlso written up in: thegr1ffyn/CTF-Writeups
Emergency OSINT
1 official solutionAlso written up in: thegr1ffyn/CTF-Writeups
Forensics1
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
Solve it with:File type identifier by magic bytesMagic byte and file signature tablePCAP analyzer for CTF network forensicsEXIF metadata viewerLearn: File forensics and carvingLearn: Network forensics
why Forensics
1 official solutionAlso written up in: thegr1ffyn/CTF-Writeups
Steganography1
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
You Can't See Me Steganography
1 official solutionAlso written up in: thegr1ffyn/CTF-Writeups