思路：

使用ida打开题目

发现一片红的，ida识别不出来，根据题目确定是有花指令，向下找

image-20231102213342993.png
image-20231102213342993.png

image-20231102213352747.png
image-20231102213352747.png

image-20231102213402191.png
image-20231102213402191.png

一共找到三个花指令

选中花指令跳转的地方按u，选中将不执行的代码ctrl+n，将其nop掉，再按c转换成代码，到函数头按p创建函数就完成了去花操作

image-20231102214110484.png
image-20231102214110484.png

去玩花查看伪代码

发现是rc4加密，秘钥是WOWOWOWWOWOWOW

直接写脚本解密

exp:

from   Crypto.Cipher import ARC4
enc = [
        0xF4, 0x87, 0xD4, 0xFA, 0x61, 0xA6, 0x71, 0x12, 0x75, 0x09, 
        0xFE, 0xD8, 0xE4, 0x38, 0x97, 0x51, 0xA8, 0xDF, 0x85, 0x65, 
        0xC2, 0xB2, 0x15, 0xEF, 0x1F, 0xEC, 0x69, 0xDD, 0x6E, 0xE9, 
        0xCF, 0x07, 0xAE, 0xC8, 0x17, 0xF0, 0x65, 0x72, 0xE6, 0x73, 
        0xA4, 0x0C, 0x87, 0x64, 0x9E, 0x9E, 0x71, 0x8C, 0x7F, 0xD7, 
        0x75, 0x84
    ]
key = "WOWOWOWWOWOWOW"
rc4 = ARC4.new(key.encode())
print(rc4.decrypt(bytearray(enc)))

flag:

flag{You!FlowerMaster!YouPassTheThirdPZGALAXYlevel!}