Reversing

picoCTF 2018: keygen-me-1

問題 問題文 Can you generate a valid product key for the validation program in /problems/keygen-me-1_1_8eb35cc7858ff1d2f55d30e5428f30a7 問題概要 x86のELFファイルが与えられる. 解答例 指針 Cutter で解析 解説 wget コマンドで問題ファイルを取っ…

picoCTF2018: quackme up

問題 問題文 The duck puns continue. Can you crack, I mean quack this program as well? You can find the program in /problems/quackme-up_2_bf9649c854a2615a35ccdc3660a31602 on the shell server. 問題概要 x86のELFファイルが与えられる. 解答例 指…

picoCTF2018: be-quick-or-be-dead-1

問題 問題文 You find this when searching for some music, which leads you to be-quick-or-be-dead-1. Can you run it fast enough? You can also find the executable in /problems/be-quick-or-be-dead-1_3_aeb48854203a88fb1da963f41ae06a1c. 問題概要…

picoCTF 2019: asm3

問題 問題文 What does asm3(0xd46c9935,0xdfe28722,0xb335450f) return? Submit the flag as a hexadecimal value (starting with '0x'). NOTE: Your submission for this question will NOT be in the normal flag format. Source located in the director…

picoCTF 2018: be-quick-or-be-dead-2

問題 問題文 As you enjoy this music even more, another executable be-quick-or-be-dead-2 shows up. Can you run this fast enough too? You can also find the executable in /problems/be-quick-or-be-dead-2_2_7e92e9cc48bad623da1c215c192bc919. Hin…

picoCTF 2018: quackme

問題 問題文 Can you deal with the Duck Web? Get us the flag from this program. You can also find the program in /problems/quackme_1_374d85dc071ada50a08b36597288bcfd. Hints: Objdump or something similar is probably a good place to start. 問…

34C3 Junior CTF: ARM2

問題 問題文 Can you reverse engineer this code and get the flag? This code is ARM Thumb 2 code which runs on an STM32F103CBT6. You should not need such a controller to solve this challenge. There are 5 stages in total which share all the s…