Category: Programming Points: 300 In each stage send the maximun size of area that can be covered by given points as a vertex of polygon in 2D. nc 217.218.48.84 12433 mirror 1 : nc 217.218.48.8...

Category: pwn Points: 100 (Saw this-1), 400 (Saw this-2) Survive and get the flag! Note: This challenge contains two flags, one of them is easier to fetch, the other is harder. The easier flag...

Category: Pwn Points: 250 Just another pwn task. Break in! nc pwnie.2015.volgactf.ru 7777 my_little_pwnie I solve the challenge after the end of the CTF, because I think this is a great ...

Category: PPC Points: 300 nc mathproblem.2015.volgactf.ru 8888 This problem remind me of HITCON CTF 2014 – 24 The server gave us 5 numbers v1, v2, v3, v4 & v5, and ask us to use +, -, *...

BackdoorCTF 2015 For me, this is a challenge for CTF beginners. Most of the challenges are easy to solve, although some of them require some “imagination”… In this writeup, I’ll post the solutions...

Talentyange gives lots of tedious apks and you know how bad he is now. Let’s try some interesting geography knowledge. nc 202.112.26.111 29995 / nc 202.112.28.118 29995 So basically we j...

Different people see different me. But I am always myself. <202.112.26.114:12321> Make the output of your program exactly the same as your source code. All 5 correct required to get thi...

Code400 gave us a python script import json import hashlib import os import base64 from Crypto.Cipher import AES fp = open("secret.json", "r") secret = json.load(fp) fp.close() if type(secret["...

Similar with Pwn200, Pwn400 gave us a binary file, but no libc.so. Open it with IDA Pro and analyze it, we found some information: First, there’s a data structure ( let’s call it node ) which loo...

SCTF is a CTF contest hold by XCTF ( seems like a Chinese version’s CTFtime.org ). Teaming up with my labmates, we have a lot of fun solving the challenges, and scored 2161 pts with the final rank ...