BUUCTF：snake

题目地址：https://buuoj.cn/challenges#snake

binwalk分析发现图片中隐写了压缩包，使用foremost进行分离得到一个压缩包，内容如下

PS C:\Users\Administrator> php -r "echo base64_decode('V2hhdCBpcyBOaWNraSBNaW5haidzIGZhdm9yaXRlIHNvbmcgdGhhdCByZWZlcnMgdG8gc25ha2VzPwo=');"
What is Nicki Minaj's favorite song that refers to snakes?

serpent加密，key(小写)：anaconda

serpent在线解密：http://serpent.online-domain-tools.com/

flag{
    
    who_knew_serpent_cipher_existed}