ctf-writeups

Format 200 points

题意

A set of several small misc challenges for beginners. Have fun!

Check this little stuff:

UEsDBBQACQBjABaIKE1vm4SuOgAAABwAAAAEAAsAZmxhZwGZBwABAEFFAwgApWUQlimQ7meiBo6QS8LoGxVv7Dj2gtSxLCjs/tIZsbyVPmUp/B7SzNBzCwv86/g02+H994xFQ5Ry3lBLBwhvm4SuOgAAABwAAABQSwECHwAUAAkAYwAWiChNb5uErjoAAAAcAAAABAAvAAAAAAAAACAAAAAAAAAAZmxhZwoAIAAAAAAAAQAYANxyD6pBR9QBb62NUUFH1AFvrY1RQUfUAQGZBwABAEFFAwgAUEsFBgAAAAABAAEAYQAAAHcAAAAAAA==

Attachment: format.zip

解题步骤

在 format.zip 里面有一张图片，通过 StegSolve.jar 发现左上角有一个隐写的二维码，扫描出来得到：

XRL:QNGN+SBEZNG=VASBEZNGVBA

ROT-13 解码后：

KEY:DATA+FORMAT=INFORMATION

用 DATA+FORMAT=INFORMATION 解压缩，得到 THUCTF{juSt_@_pieCe_0f_c@ke} 。