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HITCON CTF 2016 Quals -- Hackpad

Category: Crypto & Forensics Points: 150 I did not look at this challenge at first, until I found that many teams have already solved this one except us, so I decide to give it a try :P It ...

HITCON CTF 2016 Quals -- ROP

Category: Reverse Points: 250 The challenge gave us a file call rop.iseq. By checking the file header, I found that it was a binary format of Ruby’s InstructionSequence. By googling the Instruc...

HITCON CTF 2016 Quals -- flame

Category: PPC ( more like Reverse ) Points: 150 We were given a 32 bit PowerPC ELF. Fortunately I’ve got qemu-ppc-static installed on my ctf-box, so we can actually run the program by the follow...

HITCON CTF 2016 Quals -- Secret Holder

Category: pwn Points: 100 I did not finish the challenge during the contest, but was able to solve it after the game. Damn if only I can fuzz some more… 64 bit ELF, with Partial RELRO, canary ...

ASIS CTF Finals 2016 -- shadow

Category: pwn Points: 99 32 bit ELF, with no NX, PIE, RELRO protection. The program will first use mmap to allocate a range of memory and treat it as a shadow stack, which stores the function re...

ASIS CTF Finals 2016 -- car market

Category: pwn Points: 177 64 bit ELF, with Partial RELRO, Canary & NX enabled, no PIE. libc.so was provided. The binary is a car market program. It will let us list our cars’ info, add a ca...

MMA 2nd CTF 2016 -- Interpreter

Category: pwn Points: 200 64 bit ELF, with FULL RELRO, NX, stack guard & PIE enabled. After doing some reversing, we found that it’s a Befunge-93 program interpreter. It will first read som...

MMA 2nd CTF 2016 -- greeting

Category: pwn Points: 150 After a long period of time without playing any CTF, I finally finished my master’s degree and have time to enjoy some CTF challenges. And then there is the Tokyo Weste...

Hack.lu CTF 2015 -- secret library

Category: Reversing Points: 200 64 bit ELF This service is a some kind of weird library system, which has the following functions: View the book title. You’ll have to be the “head librarian”...

CSAW CTF 2015 -- autobots

Category: Exploitable Points: 350 I hear bots are playing ctfs now. nc 52.20.10.244 8888 Once we connect to the service, it will send us a 64 bit ELF binary. int __cdecl main(int argc, con...