2021-8-7-CTF
1、
题目名称:Blue Monday
题目类型:Misc
题目内容:
Those who came before me lived through their vocations From the past until completion, they'll turn away no more And still I find it so hard to say what I need to say But I'm quite sure that you'll tell me just how I should feel today. blue_monday
解题技巧:不知名文件先用HXD打开发现没有明显的flag
但是可以发现规律,有很多“.Id.\€I.”这个,将下面的d前面字母(或€后面的字母)全部连接一起便得到IceCTF
也可以用脚本(python):
# -*- coding: UTF-8 -*-
f=open('blue_monday','rb')
flag=''
s=f.read()
print(s)
for i in range(int(len(s))):
# print(ord(chr(s[i])))
if ord(chr(s[i]))==128:
# print(i)
print(s[i+1])
flag+=chr(s[i+1])
i=i+1
print(flag)
题目答案:IceCTF{HAck1n9_mU5Ic_W17h_mID15_L3t5_H4vE_a_r4v3}
2、
题目名称:被探嗅的流量
题目类型:Misc
题目内容:
某黑客潜入到某公司内网通过嗅探抓取了一段文件传输的数据,该数据也被该公司截获,你能帮该公司分析他抓取的到底是什么文件的数据吗? 注意:得到的 flag 请包上 flag{} 提交