2019from the authors’ own sites
gCTF MicroServiceDaemonOS
1 challenge with 1 published solution between them. The writeups for this event were found on the authors’ own sites.
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
and exploiting ELF file.
1 official solutionAlso written up in: expend20.github.io