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Flare-on Challenge 2019 Write-up

Another year of Flare-on challenge ! As a guy who’s interetesed in reverse engineering, this is definitely a great chance for me to practice/sharpen my reversing skills ! This year it has 12 challe...

Flare-on Challenge 2018 Write-up

Flare-on challenge is a Reverse-style CTF challenge created by the FireEye FLARE team. The CTF contains lots of interesting, real-world style reversing challenges ( e.g. de-obfucating binary, malwa...

Some notes on migrating to Jekyll

Recently I’ve decided to migrate my blogging framework from Hexo to Jekyll. Here are some notes that I took for recording the migration process. Install Jekyll Here I created a Dockerfile for my...

Chakrazy -- exploiting type confusion bug in ChakraCore engine

Chakrazy is a browser CTF challenge created by team PPP for the 2017 PlaidCTF event. It’s a challenge based on Microsoft’s ChakraCore Javascript engine. You can download the challenge file here. ...

Learning browser exploitation via 33C3 CTF feuerfuchs challenge

So I’ve been playing with the browser exploitation recently, by studying some browser CTF challenges. So far I’ve tried qwn2own, SGX_Browser and feuerfuchs. qwn2own and SGX_Browser are both grea...

hxp CTF 2017 -- hardened_flag_store

Category: Pwnable 64 bit ELF with PIE, NX, FULL RELRO enabled The program will read a secret string from “secret.txt” and store the string address on stack. Then it will use seccomp to create a...

MeePwn CTF 2017 -- Brainfuck 1 & 2

Category: Pwnable Both binaries are 64 bit ELF, No RELRO, No canary, PIE & NX enabled. Brainfuck1 The program is a simple brainfuck language interpreter: it read input ( brainfuck code ), ...

MeePwn CTF 2017 -- anotherarena

Category: Pwnable 64 bit ELF, Partial RELRO, canary & NX enabled, No PIE. The program is a simple crackme program with multi-thread. First, the program will read the FLAG into a global buff...

MeePwn CTF 2017 -- Old School

Category: Pwnable 64 bit ELF, Partial RELRO, NX enabled, No PIE, has canary. -------- BookStore -------- 1. Add Book. 2. Edit Book. 3. Delete Book. 4. Show Books. 5. ...

Migrate to Github Pages

So I finally decided to migrate my blog from Logdown to Github Pages. Took me about three days to get it done. Here I write down some notes to record the whole migration process. Installing Hexo...