slb

牢宁来咯,2025-04-18 10:35

拿到文件之后打开发现是黑的

根据大小来看，不太可能存在文件包含

但是根据像素来看，这个图片极有可能是个二维码

slb得到很多二维码，这里就不一一列举了

扫这个得到flag

暂无回复。你的想法是什么？

牢宁来咯发帖人

暂无大纲。

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首先nc连接后发现要用100个字符填充且最后8个为Syclover，就直接cyclic(92)+b'Syclover'即可。接着，要我们计算一个方程式，我们自己计算是不可能的，于是就编写脚本：from pwn import* io=remote('nc1.ctfplus.cn',12145)payload=cyclic(100-8)+b'Syclover' io.sendline(payload) io.recvuntil(b'first one\n') que = io.recvline().decode().strip() result = eval(que.split('=')[0].strip()) io.sendline(str(result))io.interactive()

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