題目連結

https://learn.cylabacademy.org/library/243

題目解法

啟動題目後,使用 nc 指令連線後,題目會提供一個字串,要求使用 md5 雜湊後的值,輸入正確三次即可得到 flag。可以搜尋 md5 雜湊工具、cyberchek、或是使用 md5sum 指令。 md5sum 使用方式:

$ echo -n "caffeine" | md5sum                     
e724f8b8a8349afb5beaeaa300323933  -

實際連線:

$ nc saturn.picoctf.net 56275
Please md5 hash the text between quotes, excluding the quotes: 'caffeine'
Answer: 
e724f8b8a8349afb5beaeaa300323933
e724f8b8a8349afb5beaeaa300323933
Correct.
Please md5 hash the text between quotes, excluding the quotes: 'Japan'
Answer: 
53a577bb3bc587b0c28ab808390f1c9b
53a577bb3bc587b0c28ab808390f1c9b
Correct.
Please md5 hash the text between quotes, excluding the quotes: 'hangnails'
Answer: 
7e3193d5ef5d764bfd8874dda4b5253a
7e3193d5ef5d764bfd8874dda4b5253a
Correct.
picoCTF{4pp-----------------------de2}