https://buuoj.cn/challenges#[CFI-CTF%202018]IntroToPE

NET逆向

找到

public bool verifyPasswd()
{
bool result = false;
bool flag = Convert.ToBase64String(Encoding.UTF8.GetBytes(this.passwd)) == "Q0ZJey5OZXRDI18xc19AdzNzMG0zfQ==";
if (flag)
{
result = true;
}
return result;
}

就行了

CFI{.NetC#_1s_@w3s0m3}

(怎么感觉最近一天一题变得这么水了)