https://buuoj.cn/challenges#[GUET-CTF2019]soul%20sipse

BUUCTF：[GUET-CTF2019]soul sipse_ico


out.wav可用Steghide无密码分离出download.txt

BUUCTF：[GUET-CTF2019]soul sipse_无密码_02


download.txt

https://share.weiyun.com/5wVTIN3

下载得到GUET.png，修改为正确的PNG文件头

BUUCTF：[GUET-CTF2019]soul sipse_ico_03


保存得到正常的图片。如下

BUUCTF：[GUET-CTF2019]soul sipse_ico_04

\u0034\u0030\u0037\u0030\u000d\u000a\u0031\u0032\u0033\u0034\u000d\u000a

Unicode解码

BUUCTF：[GUET-CTF2019]soul sipse_ico_05

4070
+1234
------
 5304
flag{5304}