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HGAME2020 Final Writeup
居然能苟进决赛绝了Misc - Good Video题目：Need a video to fresh your mind?终于又见到misc了先binwalk扫了一遍压缩包和视频文件，得到了一大堆东西。。。。。（居然还有vmdk？）查了一下头部的EBML文件格式，发现这是一种面向未来的音视频框架，而且之后的Matroska也是一种封装格式这些文件格式为了支持未来出现的新压...原创 2020-03-08 02:23:13 · 800 阅读 · 0 评论 -
HGAME2020 Week4 Writeup
完结撒花Crypto - ToyCipher_Linear题目：Why encryption based on XOR and Rotation is easy to break?还有加解密的脚本：#!/usr/bin/env python3# -*- coding: utf-8 -*-import os, binasciifrom secret import flagd...原创 2020-02-14 23:24:36 · 1386 阅读 · 0 评论 -
HGAME2020 Week3 Writeup
签到成功只求week4不要交白卷Crypto - Exchange题目：Our admin hijacked a secret channel and it looks like there are two teams doing some unspeakable transactions.nc 47.98.192.231 25258一开始先是考了个week2的Crypto签到题，...原创 2020-02-08 01:50:16 · 948 阅读 · 0 评论 -
HGAME2020 Week2 Writeup
我太南了.jpgCrypto - Verification_code题目：本周的签到题 XPnc 47.98.192.231 25678还有一段服务端的脚本#!/usr/bin/env python3# -*- coding: utf-8 -*-import socketserverimport os, sys, signalimport string, randomfr...原创 2020-01-31 20:46:41 · 1326 阅读 · 0 评论 -
HGAME2020 Week1 Writeup
纯正新人CTF选手的误打误撞上分过程“这题目上头是上头但是咱不上分啊”Crypto - InfantRSA题目：真*签到题 p = 681782737450022065655472455411; q = 675274897132088253519831953441; e = 13; c = pow(m,e,p*q) = 275698465082361070...原创 2020-01-24 22:17:12 · 2987 阅读 · 0 评论