HGAME2020-re-Level-Week1- advance
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题目链接：HGAME2020-re-Level-Week1- advance
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IDA64位载入
shift+F12查询字符串

交叉引用到关键代码

程序将用户输入后进行base64加密，然后与字符串进行比较，写脚本

import base64
data = "0g371wvVy9qPztz7xQ+PxNuKxQv74B/5n/zwuPfX"
zf = "abcdefghijklmnopqrstuvwxyz0123456789+/ABCDEFGHIJKLMNOPQRSTUVWXYZ"
biao = str.maketrans(zf,"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/")
data1 = data.translate(biao)
flag = str(base64.b64decode(data1.encode('utf-8')),'utf-8')
print(flag)

可参考Base16,Base32,Base64编码详细学习

得到flag为hgame{b45e6a_i5_50_eazy_6VVSQ}