2014/03 썸네일형 리스트형 [RuCTF 2014 quals] Reversing 500 First, it is packed by upx. so just unpack binary. then, because of undefined instruction(0F 0B), it starts exception handler.So, strcmp with "oh_nasty_boy!you_hacked_me:(hehe" is just fake. exception handler is in 0x4010d0. At 0x4010d0, insert keys and encode input. and finally compare with another real answer routine is as follow. 1. exception handler starts2. insert key to stack3. xor key wit.. 더보기 이전 1 다음