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增加WebSocket内存马检测，没写kill功能 #4

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增加WebSocket内存马检测，没写kill功能 #4

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55ef669
增加WebSocket内存马检测，没写kill功能
Anthem-whisper Jul 20, 2022
a28073f
修正单词拼写错误
Anthem-whisper Jul 20, 2022
e0d1c43
update README.md
Anthem-whisper Jul 20, 2022
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4 changes: 4 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -8,5 +8,9 @@

![Tomcat内存马扫描结果展示](doc/listener.png)

增加websocket型内存马检测，如果不存在endpoint则不显示

![Tomcat内存马扫描结果展示](doc/endpoints.png)

## 0x03 更多
[Filter/Servlet型内存马的扫描抓捕与查杀](https://gv7.me/articles/2020/filter-servlet-type-memshell-scan-capture-and-kill/)
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137 changes: 100 additions & 37 deletions tomcat-memshell-scanner.jsp
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@@ -1,14 +1,14 @@
<%@ page import="java.net.URL" %>
<%@ page import="java.lang.reflect.Field" %>
<%@ page import="java.util.HashMap" %>
<%@ page import="com.sun.org.apache.bcel.internal.Repository" %>
<%@ page import="java.net.URLEncoder" %>
<%@ page import="java.util.Map" %>
<%@ page import="org.apache.catalina.core.StandardWrapper" %>
<%@ page import="java.lang.reflect.Method" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.util.List" %>
<%@ page import="java.util.concurrent.CopyOnWriteArrayList" %>
<%@ page import="javax.websocket.server.ServerEndpointConfig" %>
<%@ page import="javax.websocket.server.ServerContainer" %>
<%@ page import="java.util.concurrent.ConcurrentHashMap" %>
<%@ page import="java.util.*" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
Expand Down Expand Up @@ -155,6 +155,27 @@
return listenerList;
}

public synchronized List<ServerEndpointConfig> getEndpointConfigs(HttpServletRequest request) throws Exception {
ServerContainer sc = (ServerContainer) request.getServletContext().getAttribute(ServerContainer.class.getName());
Field _configExactMatchMap = sc.getClass().getDeclaredField("configExactMatchMap");
_configExactMatchMap.setAccessible(true);
ConcurrentHashMap configExactMatchMap = (ConcurrentHashMap) _configExactMatchMap.get(sc);

Class _ExactPathMatch = Class.forName("org.apache.tomcat.websocket.server.WsServerContainer$ExactPathMatch");
Method _getconfig = _ExactPathMatch.getDeclaredMethod("getConfig");
_getconfig.setAccessible(true);

List<ServerEndpointConfig> configs = new ArrayList<>();
Iterator<Map.Entry<String, Object>> iterator = configExactMatchMap.entrySet().iterator();

while (iterator.hasNext()) {
Map.Entry<String, Object> entry = iterator.next();
ServerEndpointConfig config = (ServerEndpointConfig)_getconfig.invoke(entry.getValue());
configs.add(config);
}
return configs;
}

public String getFilterName(Object filterMap) throws Exception {
Method getFilterName = filterMap.getClass().getDeclaredMethod("getFilterName");
getFilterName.setAccessible(true);
Expand Down Expand Up @@ -318,45 +339,87 @@
}
out.write("</tbody></table>");

List<Object> listeners = getListenerList(request);
if (listeners == null || listeners.size() == 0) {
return;
List<Object> listeners = null;
try {
listeners = getListenerList(request);
} catch (Exception e) {
throw new RuntimeException(e);
}
out.write("<tbody>");
List<ServletRequestListener> newListeners = new ArrayList<>();
for (Object o : listeners) {
if (o instanceof ServletRequestListener) {
newListeners.add((ServletRequestListener) o);
if (listeners != null && listeners.size() != 0) {
out.write("<tbody>");
List<ServletRequestListener> newListeners = new ArrayList<>();
for (Object o : listeners) {
if (o instanceof ServletRequestListener) {
newListeners.add((ServletRequestListener) o);
}
}

// Scan listener
out.write("<h4>Listener scan result</h4>");
out.write("<table border=\"1\" cellspacing=\"0\" width=\"95%\" style=\"table-layout:fixed;word-break:break-all;background:#f2f2f2\">\n" +
" <thead>\n" +
" <th width=\"5%\">ID</th>\n" +
" <th width=\"20%\">Listener class</th>\n" +
" <th width=\"30%\">Listener classLoader</th>\n" +
" <th width=\"35%\">Listener class file path</th>\n" +
" <th width=\"5%\">dump class</th>\n" +
" <th width=\"5%\">kill</th>\n" +
" </thead>\n" +
" <tbody>");

int index = 0;
for (ServletRequestListener listener : newListeners) {
out.write("<tr>");
out.write(String.format("<td style=\"text-align:center\">%d</td><td>%s</td><td>%s</td><td>%s</td><td style=\"text-align:center\"><a href=\"?action=dump&className=%s\">dump</a></td><td style=\"text-align:center\"><a href=\"?action=kill&servletName=%s\">kill</a></td>"
, index + 1
, listener.getClass().getName()
, listener.getClass().getClassLoader()
, classFileIsExists(listener.getClass())
, listener.getClass().getName()
, listener.getClass().getName()));
out.write("</tr>");
index++;
}
out.write("</tbody></table>");
}

// Scan listener
out.write("<h4>Listener scan result</h4>");
out.write("<table border=\"1\" cellspacing=\"0\" width=\"95%\" style=\"table-layout:fixed;word-break:break-all;background:#f2f2f2\">\n" +
" <thead>\n" +
" <th width=\"5%\">ID</th>\n" +
" <th width=\"20%\">Listener class</th>\n" +
" <th width=\"30%\">Listener classLoader</th>\n" +
" <th width=\"35%\">Listener class file path</th>\n" +
" <th width=\"5%\">dump class</th>\n" +
" <th width=\"5%\">kill</th>\n" +
" </thead>\n" +
" <tbody>");
// Scan Endpoints
List<ServerEndpointConfig> configs = null;
try {
configs = getEndpointConfigs(request);
} catch (Exception e) {
throw new RuntimeException(e);
}
if (configs != null && configs.size() != 0) {
out.write("<h4>Endpoints scan result</h4>");
out.write("<table border=\"1\" cellspacing=\"0\" width=\"95%\" style=\"table-layout:fixed;word-break:break-all;background:#f2f2f2\">\n" +
" <thead>\n" +
" <th width=\"5%\">ID</th>\n" +
" <th width=\"10%\">URI path</th>\n" +
" <th width=\"20%\">Endpoint class</th>\n" +
" <th width=\"20%\">Endpoint classLoader</th>\n" +
" <th width=\"35%\">Endpoint class file path</th>\n" +
" <th width=\"5%\">dump class</th>\n" +
" <th width=\"5%\">kill</th>\n" +
" </thead>\n" +
" <tbody>");

int index = 0;
for (ServletRequestListener listener : newListeners) {
out.write("<tr>");
out.write(String.format("<td style=\"text-align:center\">%d</td><td>%s</td><td>%s</td><td>%s</td><td style=\"text-align:center\"><a href=\"?action=dump&className=%s\">dump</a></td><td style=\"text-align:center\"><a href=\"?action=kill&servletName=%s\">kill</a></td>"
, index + 1
, listener.getClass().getName()
, listener.getClass().getClassLoader()
, classFileIsExists(listener.getClass())
, listener.getClass().getName()
, listener.getClass().getName()));
out.write("</tr>");
index++;
int index = 0;
for (ServerEndpointConfig cfg : configs) {
out.write("<tr>");
out.write(String.format("<td style=\"text-align:center\">%d</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td><td style=\"text-align:center\"><a href=\"?action=dump&className=%s\">dump</a></td><td style=\"text-align:center\"><a href=\"#\">kill</a></td>"
, index + 1
, cfg.getPath()
, cfg.getEndpointClass().getName()
, cfg.getEndpointClass().getClassLoader().getClass().getName()
, classFileIsExists(cfg.getEndpointClass())
, cfg.getEndpointClass().getName()
, cfg.getEndpointClass().getName()));
out.write("</tr>");
index++;
}
out.write("</tbody></table>");
}
out.write("</tbody></table>");
}
%>
</div>
Expand Down