BUUCTF：snake

Subject address: https://buuoj.cn/challenges#snake

binwalkThe analysis found that the compressed package is steganographic in the picture, and the compressed package is foremostobtained by separating it with the following content

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 (lowercase):anaconda

Serpent online decryption: http://serpent.online-domain-tools.com/

flag{
    
    who_knew_serpent_cipher_existed}