CTF Beginners Guide \ Reversing with Radare2

Talos Intelligence

Spenser Reinhardt

Trail of Bits: EasyServer

Local Files

Path	Usage
CTF_Beginners_Guide.pptx	This presentation
binaries/easy32	Challenge Binary (32-bit Linux ELF statically linked)
binaries/easy_key	Challenge flag (place in same dir as easy32)
source/EasyServer.c	Challenge C source
source/makefile	Compile new easy32 with make all
analysis/easy32.md	Plaintext analysis of easy32 binary
analysis/easy32.i64	IDA Pro 7.2 (64-bit) analysis database
analysis/easy32.bndb	Binary Ninja analysis database
analysis/easy32-r2db/rc	Radare2 analysis project
analysis/easy32-parent-manual.r2	Radare2 debug script for parent process, stops on breakpoints for inspection
analysis/easy32-child-manual.r2	Radare2 debug script for child process, stops on breakpoints for inspection
analysis/easy32-parent-auto.r2	Radare2 debug script for parent process, automates debugging (some dbc commands may fail)
analysis/easy32-child-auto.r2	Radare2 debug script for child process, automates debugging (some dbc commands may fail)
exploitation/just_answer.py	Script sending single correct answer
exploitation/40bytes.py	Script sending 40 bytes, incorrectly overflowing
exploitation/exploit.py	Script correctly overflowing all game questions
extra/radare2rc	Radare2 configuration profile