哥斯拉 (Godzilla) WebShell 管理工具深度优化指南<\/h1>

文档说明<\/h2>
本文档基于：<\/strong> 哥斯拉 v4.15 特战版本
目标读者：<\/strong> 具备哥斯拉基础使用经验的渗透测试人员、安全研究人员
核心目标：<\/strong> 深入讲解哥斯拉的二开优化技巧，旨在增强其隐蔽性、易用性和扩展性，以应对高对抗环境。<\/p>

一、功能修改：增强流量隐蔽性<\/h2>
1.1 生成 Shell 时随机化密码(Pass)和密钥(Key)<\/h3>
问题背景：<\/strong>
默认生成的 WebShell 中，密码和密钥的参数名是固定的（例如 pass<\/code> 和 key<\/code>），特征明显，容易被安全设备检测。<\/p>
解决方案：<\/strong> 从真实业务流量中提取常见的参数名，在每次生成 Shell 时随机选用，并进行占用管理，确保不重复。<\/p>
实现步骤：<\/strong><\/p>
构建参数名池：<\/strong> 抓取大量正常业务 HTTP 请求，提取常见的参数名称（如 csrfmiddlewaretoken<\/code>, client_id<\/code>, access_token<\/code>, timestamp<\/code> 等），构建一个参数名列表。<\/p> \/\/ 示例代码：初始化一个常见的参数名池 <\/span><\/span><\/span><\/span>List<<\/span>String><\/span> names =<\/span> Arrays.<\/span>asList<\/span>(<\/span> <\/span><\/span> "csrfmiddlewaretoken"<\/span>,<\/span> "grant_type"<\/span>,<\/span> "client_id"<\/span>,<\/span> "client_secret"<\/span>,<\/span> <\/span><\/span> "redirect_uri"<\/span>,<\/span> "response_type"<\/span>,<\/span> "scope"<\/span>,<\/span> "state"<\/span>,<\/span> "code"<\/span>,<\/span> <\/span><\/span> "access_token"<\/span>,<\/span> "refresh_token"<\/span>,<\/span> "token_type"<\/span>,<\/span> "error_uri"<\/span>,<\/span> <\/span><\/span> "all_cnt"<\/span>,<\/span> "user_id"<\/span>,<\/span> "email"<\/span>,<\/span> "status"<\/span>,<\/span> "message"<\/span>,<\/span> "timestamp"<\/span>,<\/span> "signature"<\/span> <\/span><\/span> \/\/ ... 更多参数名 <\/span><\/span><\/span><\/span>);<\/span> <\/span><\/span><\/code><\/pre><\/li> 实现随机选取与占用管理：<\/strong> 使用一个 Map<String, Integer><\/code> 来跟踪每个参数名的使用状态（0 未使用，1 已使用）。提供一个方法随机获取一个未被占用的参数名，并将其标记为已使用。<\/p> private<\/span> static<\/span> Map<<\/span>String,<\/span> Integer><\/span> payloadNames =<\/span> new<\/span> HashMap<>();<\/span> \/\/ 初始化时将所有名称放入，value设为0 <\/span><\/span><\/span><\/span> <\/span><\/span>\/** <\/span><\/span><\/span> * 辅助函数，随机生成未被占用的名称 <\/span><\/span><\/span> * @return 随机生成的未被占用的名称 <\/span><\/span><\/span> *\/<\/span> <\/span><\/span>private<\/span> static<\/span> String getRandomName<\/span>()<\/span> {<\/span> <\/span><\/span> List<<\/span>String><\/span> availableNames =<\/span> new<\/span> ArrayList<>();<\/span> <\/span><\/span> for<\/span> (<\/span>Map.<\/span>Entry<\/span><<\/span>String,<\/span> Integer><\/span> entry :<\/span> payloadNames.<\/span>entrySet<\/span>())<\/span> {<\/span> <\/span><\/span> if<\/span> (<\/span>entry.<\/span>getValue<\/span>()<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span> \/\/ 未被占用 <\/span><\/span><\/span><\/span> availableNames.<\/span>add<\/span>(<\/span>entry.<\/span>getKey<\/span>());<\/span> <\/span><\/span> }<\/span> <\/span><\/span> }<\/span> <\/span><\/span> if<\/span> (<\/span>availableNames.<\/span>isEmpty<\/span>())<\/span> {<\/span> <\/span><\/span> throw<\/span> new<\/span> IllegalStateException(<\/span>"No available names left"<\/span>);<\/span> <\/span><\/span> }<\/span> <\/span><\/span> Random random =<\/span> new<\/span> Random();<\/span> <\/span><\/span> String name =<\/span> availableNames.<\/span>get<\/span>(<\/span>random.<\/span>nextInt<\/span>(<\/span>availableNames.<\/span>size<\/span>()));<\/span> <\/span><\/span> payloadNames.<\/span>put<\/span>(<\/span>name,<\/span> 1<\/span>);<\/span> \/\/ 标记为已使用 <\/span><\/span><\/span><\/span> return<\/span> name;<\/span> <\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre><\/li> 修改 GUI 生成逻辑：<\/strong> 在 `core.ui.component.frame.BasicShellSetting#<\/p> <\/li> <\/ol> \[$setupUI \]<\/span><\/p> $方法中（**注意：** 若使用 Swing 设计器，避免直接修改此方法，应在其它初始化位置修改），将生成 Shell 的密码和密钥参数名替换为调用<\/code>getRandomName()` 方法。<\/p> 最终效果：<\/strong> 生成的 WebShell 连接参数不再是固定的 pass<\/code> 和 key<\/code>，而是随机化的常见业务参数名，极大降低了特征性。<\/p> 1.2 请求左右添加数据随机化<\/h3> 问题背景：<\/strong> “左右添加数据”功能常用于绕过一些简单的 WAF 规则，但用户常常忘记或懒得填写，导致该功能形同虚设。<\/p> 解决方案：<\/strong> 自动生成随机的键值对数据，附加到请求的原始数据左右两侧。关键点：<\/strong> 生成的键名必须从上述公共参数名池中获取，并确保与密码、密钥的参数名不冲突。<\/p> 实现代码：<\/strong><\/p> \/** <\/span><\/span><\/span> * 生成随机左侧附加数据 <\/span><\/span><\/span> * @param numPairs 要生成的键值对数量 <\/span><\/span><\/span> * @return 生成的随机字符串，格式如 "key1=value1&key2=value2&" <\/span><\/span><\/span> *\/<\/span> <\/span><\/span>public<\/span> static<\/span> String getRandomLeftAppendData<\/span>(<\/span>int<\/span> numPairs)<\/span> {<\/span> <\/span><\/span> StringBuilder sb =<\/span> new<\/span> StringBuilder();<\/span> <\/span><\/span> Random random =<\/span> new<\/span> Random();<\/span> <\/span><\/span> for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> numPairs;<\/span> i++)<\/span> {<\/span> <\/span><\/span> String key =<\/span> getRandomName();<\/span> \/\/ 从公共池获取随机键名 <\/span><\/span><\/span><\/span> String value =<\/span> getRandomString(<\/span>random.<\/span>nextInt<\/span>(<\/span>50<\/span>));<\/span> \/\/ 生成随机值 <\/span><\/span><\/span><\/span> sb.<\/span>append<\/span>(<\/span>key).<\/span>append<\/span>(<\/span>"="<\/span>).<\/span>append<\/span>(<\/span>value);<\/span> <\/span><\/span> if<\/span> (<\/span>i <<\/span> numPairs -<\/span> 1<\/span>)<\/span> {<\/span> <\/span><\/span> sb.<\/span>append<\/span>(<\/span>"&"<\/span>);<\/span> <\/span><\/span> }<\/span> <\/span><\/span> }<\/span> <\/span><\/span> sb.<\/span>append<\/span>(<\/span>"&"<\/span>);<\/span> \/\/ 最后附加一个&与原始数据连接 <\/span><\/span><\/span><\/span> return<\/span> sb.<\/span>toString<\/span>();<\/span> <\/span><\/span>}<\/span> <\/span><\/span> <\/span><\/span>\/** <\/span><\/span><\/span> * 生成随机右侧附加数据 <\/span><\/span><\/span> * @param numPairs 要生成的键值对数量 <\/span><\/span><\/span> * @return 生成的随机字符串，格式如 "&key1=value1&key2=value2" <\/span><\/span><\/span> *\/<\/span> <\/span><\/span>public<\/span> static<\/span> String getRandomRightAppendData<\/span>(<\/span>int<\/span> numPairs)<\/span> {<\/span> <\/span><\/span> StringBuilder sb =<\/span> new<\/span> StringBuilder();<\/span> <\/span><\/span> Random random =<\/span> new<\/span> Random();<\/span> <\/span><\/span> sb.<\/span>append<\/span>(<\/span>"&"<\/span>);<\/span> <\/span><\/span> for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> numPairs;<\/span> i++)<\/span> {<\/span> <\/span><\/span> String key =<\/span> getRandomName();<\/span> \/\/ 从公共池获取随机键名 <\/span><\/span><\/span><\/span> String value =<\/span> getRandomString(<\/span>random.<\/span>nextInt<\/span>(<\/span>50<\/span>));<\/span> \/\/ 生成随机值 <\/span><\/span><\/span><\/span> sb.<\/span>append<\/span>(<\/span>key).<\/span>append<\/span>(<\/span>"="<\/span>).<\/span>append<\/span>(<\/span>value);<\/span> <\/span><\/span> if<\/span> (<\/span>i <<\/span> numPairs -<\/span> 1<\/span>)<\/span> {<\/span> <\/span><\/span> sb.<\/span>append<\/span>(<\/span>"&"<\/span>);<\/span> <\/span><\/span> }<\/span> <\/span><\/span> }<\/span> <\/span><\/span> return<\/span> sb.<\/span>toString<\/span>();<\/span> <\/span><\/span>}<\/span> <\/span><\/span> <\/span><\/span>\/\/ 辅助方法：生成随机字符串 <\/span><\/span><\/span><\/span>private<\/span> static<\/span> String getRandomString<\/span>(<\/span>int<\/span> length)<\/span> {<\/span> <\/span><\/span> \/\/ ... 实现生成随机字母数字字符串的逻辑 <\/span><\/span><\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre>最终效果：<\/strong> 在生成 Shell 或配置连接时，可以自动填充随机化的左右附加数据，使请求体看起来更像一个正常的、包含多个参数的业务请求，无需用户手动干预。<\/p> 二、功能优化：提升操作体验与扩展性<\/h2> 2.1 优化命令执行面板<\/h3> 问题背景：<\/strong><\/p> 历史命令查看不便，需要滚动翻找。<\/li> 无法快速定位和重新查看特定命令的详细执行结果（包括命令、路径、时间、输出）。<\/li> <\/ol> 解决方案：<\/strong> 设计一个独立的历史命令记录面板，以结构化数据（JSON）存储每次命令执行的详细信息，并提供 GUI 界面进行点击查看。<\/p> 实现步骤：<\/strong><\/p> 数据结构设计：<\/strong> 每次执行命令后，将其详细信息序列化为 JSON 对象并写入日志文件。<\/p> { <\/span><\/span> "command"<\/span>: "whoami"<\/span>, <\/span><\/span> "workingDir"<\/span>: "\/var\/www\/html"<\/span>, <\/span><\/span> "timestamp"<\/span>: "2025-09-10T08:30:45.123Z"<\/span>, <\/span><\/span> "response"<\/span>: "www-data"<\/span> <\/span><\/span>} <\/span><\/span><\/code><\/pre><\/li> 记录逻辑：<\/strong> 在命令执行的核心方法中，添加日志记录逻辑。例如，在执行完命令并获取到结果后，将上述信息组装成 JSON 字符串，写入到特定的历史命令日志文件中（如 godzilla_history.log<\/code>）。<\/p> <\/li> GUI 界面开发：<\/strong><\/p> 在主界面右侧创建一个新的面板（例如 JList<\/code> 或 JTable<\/code>）。<\/li> 列表项显示命令的摘要（如 [时间] 命令<\/code>）。<\/li> 点击列表中的某一项时，解析对应的 JSON 记录，并在一个详情区域（如 JTextArea<\/code>）中格式化显示所有信息。<\/li> <\/ul> <\/li> <\/ol> 最终效果：<\/strong> 用户可以通过右侧的历史命令列表清晰、快速地浏览和检索所有执行过的命令，并查看其完整执行上下文和结果，极大提升了操作效率和审计便利性。<\/p> 2.2 插件加载机制修改<\/h3> 问题背景：<\/strong> 当添加了自定义的 Payload 类型（例如 PhpPlus<\/code>）后，通过该 Payload 连接的 WebShell 无法加载任何插件（如 BypassDisableFunctions<\/code>）。原因是哥斯拉原有的插件加载机制通过注解 @PluginAnnotation<\/code> 绑定，一个插件只声明对一种 Payload 有效。<\/p> 解决方案：<\/strong> 扩展插件注解机制，使一个插件可以声明对多个 Payload 类型有效。<\/p> 实现步骤：<\/strong><\/p> 创建新的多 Payload 注解类：<\/strong> 新建 core.annotation.PluginAnnotations<\/code> 类，它是一个容器注解，持有多个 @PluginAnnotation<\/code>。<\/p> @Retention<\/span>(<\/span>RetentionPolicy.<\/span>RUNTIME<\/span>)<\/span> <\/span><\/span>@Target<\/span>(<\/span>ElementType.<\/span>TYPE<\/span>)<\/span> <\/span><\/span>public<\/span> @interface<\/span> PluginAnnotations {<\/span> <\/span><\/span> PluginAnnotation[]<\/span> value<\/span>();<\/span> <\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre><\/li> 修改插件扫描逻辑：<\/strong> 在 core.ApplicationContext#scanPlugin<\/code> 方法中，修改注解读取逻辑。首先检查类上是否存在 @PluginAnnotations<\/code>，如果存在，则遍历其内部的每一个 @PluginAnnotation<\/code> 并进行注册。如果不存在，再 fallback 到检查旧的单一 @PluginAnnotation<\/code> 注解，保持向后兼容。<\/p> \/\/ 伪代码逻辑 <\/span><\/span><\/span><\/span>PluginAnnotations multiAnnotation =<\/span> clazz.<\/span>getAnnotation<\/span>(<\/span>PluginAnnotations.<\/span>class<\/span>);<\/span> <\/span><\/span>if<\/span> (<\/span>multiAnnotation !=<\/span> null<\/span>)<\/span> {<\/span> <\/span><\/span> for<\/span> (<\/span>PluginAnnotation annotation :<\/span> multiAnnotation.<\/span>value<\/span>())<\/span> {<\/span> <\/span><\/span> \/\/ 根据 annotation.payload() 注册插件到对应的 Payload 插件列表 <\/span><\/span><\/span><\/span> }<\/span> <\/span><\/span>}<\/span> else<\/span> {<\/span> <\/span><\/span> PluginAnnotation singleAnnotation =<\/span> clazz.<\/span>getAnnotation<\/span>(<\/span>PluginAnnotation.<\/span>class<\/span>);<\/span> <\/span><\/span> if<\/span> (<\/span>singleAnnotation !=<\/span> null<\/span>)<\/span> {<\/span> <\/span><\/span> \/\/ 根据 singleAnnotation.payload() 注册插件 <\/span><\/span><\/span><\/span> }<\/span> <\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre><\/li> 为插件添加新注解：<\/strong> 在需要支持多 Payload 的插件类上，使用新的 @PluginAnnotations<\/code> 注解。<\/p> @PluginAnnotations<\/span>({<\/span> <\/span><\/span> @PluginAnnotation<\/span>(<\/span>payload =<\/span> "php"<\/span>),<\/span> \/\/ 原版支持 <\/span><\/span><\/span><\/span> @PluginAnnotation<\/span>(<\/span>payload =<\/span> "phpPlus"<\/span>)<\/span> \/\/ 支持自定义的 PhpPlus Payload <\/span><\/span><\/span><\/span>})<\/span> <\/span><\/span>public<\/span> class<\/span> BypassDisableFunctionsPlugin<\/span> implements<\/span> Plugin {<\/span> <\/span><\/span> \/\/ ... 插件实现 <\/span><\/span><\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre><\/li> <\/ol> 最终效果：<\/strong> 自定义的 Payload 类型（如 PhpPlus<\/code>）现在可以正常加载并使用所有为其添加了注解的插件，功能与原版 Payload 完全一致。这使得基于哥斯拉框架定制化开发更加灵活。<\/p> 三、总结与应用展望<\/h2> 通过上述四个方面的优化，哥斯拉工具的实战能力得到显著提升：<\/p> 流量层面：<\/strong> 通过动态随机化关键参数和请求体内容，有效规避了基于固定特征的检测。<\/li> 操作层面：<\/strong> 改良的历史命令管理大幅提高了操作效率和体验。<\/li> 扩展层面：<\/strong> 解决了自定义 Payload 的插件兼容性问题，打开了深度定制化的大门。<\/li> <\/ol> 应用场景展望：<\/strong><\/p> 高对抗环境：<\/strong> 利用高度伪装的 WebShell 和流量，在存在 EDR、WAF 等防护的环境中维持访问。<\/li> 定制化武器库：<\/strong> 基于插件扩展机制，可以开发针对特定中间件、框架的利用插件。<\/li> 文件管理木马：<\/strong> 可以制作一个功能精简、但流量特征与正常业务无异的“文件管理马”，专门用于文件操作，进一步增强隐蔽性。<\/li> <\/ul> 重要声明：<\/strong> 本文仅限用于安全研究和技术学习目的，请勿用于任何非法攻击活动。<\/p> <\/blockquote>