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攻防世界 MISC 进阶区 3-11
2022-07-04 22:18:00 【春风拂槛露华浓。】
3-11
题目给了一张猫咪图片用stegsolve打开,左右点了点没发现什么
看了看format,有多个不同的crc
试着修改了高度,也没有用
看一下data extract发现pk开头
是个压缩包
点击 save bin,得到压缩包
解压(提示损坏,不要紧,照样能拿到里面的txt)
复制flag.txt里的字符串
发现是base64加密
去在线网站解密发现是base64图片加密
用CaptfEencoder解密,注意前面加上data:image/jpeg;base64,
软件下载网址http://www.downza.cn/soft/273345.html
save as 保存
得到图片得到flag
FLAG{
LSB_i5_SO_EASY}
总结:
lsb隐写
压缩文件修复
base64图片隐写
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