Help us understand the problem. What is going on with this article?

MNCTF2017 通信記録☆☆★

More than 1 year has passed since last update.

問題

http://mnctf.info/mnctf2017/top.php

image.png

解いてみた

pcapファイルをダウンロードしてwiresharkで見てみます。

image.png

4万件もあるので順番に見ていくことは不可能です。

プロトコルの統計を見てみます。

image.png

TLSとSMBがかなり多い。
ということで「TLS SMB 脆弱性」で検索してみるも答えにたどり着けず。
が、「SSLに脆弱性」みたいな記事が何個か出てきたので「SSL SMB 脆弱性」で検索してみる。
「smb 脆弱性 wannacry」というキーワードが出てくる。検索してみる。

image.png

これが正解ですが、ほぼ運。。。

CTFman
主にCTFのwriteupを書いていきます。場合によってはネタバレになるので閲覧には注意してください。
Why not register and get more from Qiita?
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
Comments
No comments
Sign up for free and join this conversation.
If you already have a Qiita account
Why do not you register as a user and use Qiita more conveniently?
You need to log in to use this function. Qiita can be used more conveniently after logging in.
You seem to be reading articles frequently this month. Qiita can be used more conveniently after logging in.
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
ユーザーは見つかりませんでした