[SDCTF 2022]Flag Trafficker

题目描述如下：
We’ve sniffed the traffic of somebody suspected to be looking up flags online! Unfortunately, just searching for the flag format in their traffic doesn’t appear to be working…can you find the leaked flag?
起初没有好好看这个描述，在pcap中一顿找，也没有找到有价值的内容。后面看了wp，补充了一个知识点——HTTP对象。定义是这样的：如果两台设备在网络中有进行文件传输，那么这个传输的文件就是对象。
用wireshark的导出http对象功能，看到一个十分与众不同的对象，查看发现端倪。点击选中，导出为文件，例如a.html，点击就能获取到flag。
导出http分组
另外有网友提到，这样的类似编码是f*ckbrain，保存这个html以后遇到也可以直接解密了。
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<button type="button"
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Click to display the flag!</button>

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