Problem:

When you visit your WordPress website you are randomly redirected to unwanted websites.

Solution:

• Log in your website as an Administrator.
• Go to Appearance >> Theme Editor.
• Click on the Theme Functions link on the right side.
• Verify if malicious code was injected into the functions.php file.

Example of malicious code:

<?php
@ini_set('display_errors', '0');
error_reporting(0);
global $zeeta;
if (!$npDcheckClassBgp && !isset($zeeta)) {

• If yes, then download the functions.php file to your machine via FTP, remove the malicious code, then upload it to your server.
• If you have several themes in your website then activate them one by one and repeat the procedure for all of them.
• Open the wp-config.php file.
• Verify if malicious code was injected into the wp-config.php file.

Example of malicious code:

include_once(ABSPATH . WPINC . '/header.php');

• If yes, then verify content of the wp-includes/header.php file, and possibly remove the wp-includes/header.php file, then remove the malicious code in the wp-config.php file.
• Copy a small string of malicious code, for example npDcheckClassBgp, and search for it in the content of all the files using the commands (in Windows) below.

cd C:\inetpub\wwwroot
findstr /s "npDcheckClassBgp" *.*

where C:\inetpub\wwwroot is the path of the parent of your WordPress website.

• If you find the string in any file then review the content of the file and remove the malicious code.
• In Windows, stop the website using the command below.

net stop w3svc

• Delete all the files and folders except the wp-content folder, the wp-config.php, .htaccess, and web.config file.
• Review and remove all the suspicious contents in your wp-content directory.
• Go to the wp-content\plugins folder.
• Delete all the plugins, especially the plugins closed due to Guideline Violation.
• Manually re-download and unzip all the necessary plugins.
• Download the latest version of WordPress.
• Unzip and copy the the latest version of WordPress to the root of your website.
• In Windows, start the website using the command below.

net start w3svc

• Log in your website as an Administrator.
• Remove all the unused plug-ins or themes.
• Install, activate and configure a CAPTCHA plug-in to protect Login Form, Registration Form, Lost Password Form, Reset Password Form and Comment Form if there is no one.
• Disable insecure FTP access if there is one.
• Install and activate the Simple History plugin to review access to your website. After 1 or 2 days, review the access information, and possibly block the malicious IP addresses using the Windows Firewall.
• Install, activate and configure Cerber Security plug-in to automatically detect and block the malicious IP addresses.