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    <title>后门 on 知识带给我们自由</title>
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      <title>BUUCTF 后门查杀 1</title>
      <link>https://yuexuan521.github.io/zh/posts/buuctf-%E5%90%8E%E9%97%A8%E6%9F%A5%E6%9D%80-1/</link>
      <pubDate>Mon, 24 Jun 2024 16:36:45 +0000</pubDate>
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      <description>&lt;p&gt;
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&lt;p&gt;&lt;strong&gt;BUUCTF: &lt;a href=&#34;https://buuoj.cn/challenges&#34;target=&#34;_blank&#34; rel=&#34;noopener noreferrer&#34;&gt;https://buuoj.cn/challenges&lt;/a&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;hr&gt;
&lt;p&gt;相关阅读
&lt;a href=&#34;https://ctf-wiki.org/&#34;target=&#34;_blank&#34; rel=&#34;noopener noreferrer&#34;&gt;CTF Wiki&lt;/a&gt;&lt;/p&gt;
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&lt;h3 id=&#34;题目描述&#34;&gt;题目描述：&lt;/h3&gt;
&lt;p&gt;小白的网站被小黑攻击了，并且上传了Webshell，你能帮小白找到这个后门么？(Webshell中的密码(md5)即为答案)。&lt;/p&gt;</description>
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<p><strong>BUUCTF: <a href="https://buuoj.cn/challenges"target="_blank" rel="noopener noreferrer">https://buuoj.cn/challenges</a></strong></p>
<hr>
<p>相关阅读
<a href="https://ctf-wiki.org/"target="_blank" rel="noopener noreferrer">CTF Wiki</a></p>
<p>
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<h3 id="题目描述">题目描述：</h3>
<p>小白的网站被小黑攻击了，并且上传了Webshell，你能帮小白找到这个后门么？(Webshell中的密码(md5)即为答案)。</p>
<h3 id="密文">密文：</h3>
<p>下载附件，解压得到一个网站文件夹。</p>
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<h3 id="解题思路">解题思路：</h3>
<p>1、使用工具扫描附件所给的文件夹，可以使用D盾、火绒安全之类的工具，这里我使用D盾。
打开D盾，点击自定义扫描，选择附件给的网站文件夹，点击确定。</p>
<p>
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<p>检查出两个文件，我们挨个查看。</p>
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<p>2、第一个文件没有flag，但我们在第二个文件中找到了Webshell中的密码，密码也符合md5的格式，这个就是flag值。</p>
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<h3 id="flag">flag：</h3>
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<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span></code></pre></td>
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<pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">flag<span class="o">{</span>6ac45fb83b3bc355c024f5034b947dd3<span class="o">}</span>
</span></span></code></pre></td></tr></table>
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