2023from public repositories
PermCTF tasks 2023
3 challenges with 3 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 liveReverse engineering1
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
Solve it with:Strings extractor for binaries and blobsWebAssembly disassemblerJava .class disassemblerPython .pyc bytecode disassemblerLearn: Binary exploitation
Also written up in: PermCTF/PermCTF2023_tasks
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
StrangeCat
1 official solutionAlso written up in: PermCTF/PermCTF2023_tasks
OSINT1
Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.
Whoisit
1 official solutionAlso written up in: PermCTF/PermCTF2023_tasks