php如何实现Linux服务器木马排查及加固功能

<?php eval($_POST[cmd]);?>

<?php assert($_POST[cmd]);?>

find /wwwroot/* -type f -name "*.php" |xargs grep "eval(" > /wwwroot/scan.txt

<?php
set_time_limit(0);//防止超时
/**
*
* php目录扫描监控增强版
*
* @author lssbing (lssbing#gmail.com)
* @date 2010-1-18
* @license BSD
* @version 1.0
*
下面几个变量使用前需要手动设置
*
**/
/*===================== 程序配置 =====================*/
$pass="12345";//设置密码
$jkdir="."; //设置监控扫描的目录，当前目录为'.'，上一级目录为'..'，也可以设置绝对路径，后面不要加斜杠，默认为当前目录
$logfilename="./m.log";//设置存储log的路径，可以放置在任意位置
$exclude=array('data','images');//排除目录
$danger='eval|cmd|passthru|gzuncompress';//设置要查找的危险的函数 以确定是否木马文件
$suffix='php|inc';//设置要扫描文件的后缀
/*===================== 配置结束 =====================*/
 
$filename=$_GET['filename'];
$check=$_GET['check'];
$jumpoff=false;
$url = $_SERVER['PHP_SELF'];
$thisfile = end(explode('/',$url));
$jump="{$thisfile}|".implode('|',$exclude);
$jkdir_num=$file_num=$danger_num=0;
define('M_PATH',$jkdir);
define('M_LOG',$logfilename);
if ($check=='check')
{
$safearr = explode("|",$jump);
$start_time=microtime(true);
safe_check($jkdir);
$end_time=microtime(true);
$total=$end_time-$start_time;
$file_num=$file_num-$jkdir_num;
$message= " 文件数:".$file_num;
$message.= " 文件夹数：".$jkdir_num;
$message.= " 可疑文件数：".$danger_num;
$message.= " 执行时间：".$total;
echo $message;
}else{
if ($_GET['m']=="del") Delete();//处理文件删除
//读取文件内容
if(isset($_GET['readfile'])){
//输出查看密码，密码校验正确以后输出文件内容
if(emptyempty($_POST['passchack'])){
   echo"<form id=\"form1\" name=\"form1\" method=\"post\">"
    . " <label>pass"
    . " <input type=\"text\" name=\"passchack\" />"
    . " </label>"
    . " <input type=\"submit\" name=\"Submit\" value=\"提交\" />"
    . "</form>"
   ."";
   exit;
}elseif(isset($_POST['passchack'])&&$_POST['passchack']==$pass){
   $code=file_get_contents($_GET['readfile']);
   echo"<textarea name=\"code\" cols=\"150\" rows=\"30\" id=\"code\" style='width:100%;height:450px;background:#cccccc;'>{$code}</textarea>";
   exit;
}else{
   exit;
}
 
}else{
record_md5(M_PATH);
if(file_exists(M_LOG)){
        $log = unserialize(file_get_contents(M_LOG));
}else{
        $log = array();
}
 
if($_GET['savethis']==1){
//保存当前文件md5到日志文件
@unlink(M_LOG);
file_put_contents(M_LOG,serialize($file_list));
echo "<a href='scandir.php'>保存成功！点击返回</a>";
exit;
}
if(emptyempty($log)){
echo "当前还没有创建日志文件！点击[保存当前]创建日志文件！";
}else{
if($file_list==$log){
   echo "本文件夹没有做过任何改动！";
}else{
   if(count($file_list) > 0 ){
    foreach($file_list as $file => $md5){
    if(!isset($log[$file])){
     echo "新增文件：<a href={$file} target='_blank'>".$file."</a>"." 创建时间：".date("Y-m-d H:i:s",filectime($file))." 修改时间：".date("Y-m-d H:i:s",filemtime($file))." <a href=?readfile={$file} target='_blank'>源码</a><a href='?m=del&filename={$file}' target='_blank'>删除</u></a><br />";
    }else{
     if($log[$file] != $md5){
     echo "修改文件：<a href={$file} target='_blank'>".$file."</a>"." 创建时间：".date("Y-m-d H:i:s",filectime($file))." 修改时间：".date("Y-m-d H:i:s",filemtime($file))." <a href=?readfile={$file} target='_blank'>源码</a><br />";
 
     unset($log[$file]);
     }else{
     unset($log[$file]);
     }
    }
    }
   }
   if(count($log)>0){
    foreach($log as $file => $md5){
    echo "删除文件：<a href={$file} target='_blank'>".$file."</a><br />";
    }
   }
    }
}
}
}
 
//计算md5
function record_md5($jkdir){
        global $file_list,$exclude;
        if(is_dir($jkdir)){
                $file=scandir($jkdir);
                foreach($file as $f){
                        if($f!='.' && $f!='..' && !in_array($f, $exclude)){
                                $path = $jkdir.'/'.$f;
                                if(is_dir($path)){
                                        record_md5($path);
                                }else{
                                        $file_list[$path]=md5_file($path);
                                }
                        }
                }
        }
}
 
function Safe_Check($jkdir)//遍历文件
{
global $danger ,$suffix ,$jkdir_num ,$file_num ,$danger_num;
 
$hand=@dir($jkdir) or die('文件夹不存在') ;
while ($file=$hand->read())
{
    $filename=$jkdir.'/'.$file;
    if (!$jumpoff) {
   if(Jump($filename))continue;
    }
    if(@is_dir($filename) && $file != '.' && $file!= '..'&& $file!='./..')
    {   $jkdir_num++;
    Safe_Check($filename);
    }
    if (preg_match_all ("/\.($suffix)/i",$filename,$out))
    {
 
   $str='';
   $fp = @fopen($filename,'r')or die('没有权限');
   while(!feof($fp))
   {
   $str .= fgets($fp,1024);
   }
   fclose($fp);
   if( preg_match_all ("/($danger)[ \r\n\t]{0,}([\[\(])/i",$str,$out))
   {
   echo "<font color='green' style='font-size:14px'>可疑文件：{$filename}</font>"." 创建时间：".date("Y-m-d H:i:s",filectime($filename))." 修改时间：".date("Y-m-d H:i:s",filemtime($filename))." <a href='?readfile={$filename}' target='_blank'><u>查看代码</u></a> <a href='?m=del&filename=$filename' target='_blank'>删除</u></a><br>";
   $danger_num++;
   }
    }
    $file_num++;
}
}
function Edit()//查看可疑文件
{
global $filename;
$filename = str_replace("..","",$filename);
$file = $filename;
$content = "";
if(is_file($file))
{
    $fp = fopen($file,"r")or die('没有权限');
    $content = fread($fp,filesize($file));
    fclose($fp);
    $content = htmlspecialchars($content);
 
}
echo "<textarea name='str' style='width:100%;height:450px;background:#cccccc;'>$content</textarea>\r\n";
exit();
}
function Delete()//删除文件
{ global $filename,$pass;
if(emptyempty($_POST['passchack'])){
    echo"<form id=\"form1\" name=\"form1\" method=\"post\">"
   . " <label>pass"
   . " <input type=\"text\" name=\"passchack\" />"
   . " </label>"
   . " <input type=\"submit\" name=\"Submit\" value=\"提交\" />"
   . "</form>"
    ."";
    exit;
}elseif(isset($_POST['passchack'])&&$_POST['passchack']==$pass){
   (is_file($filename))?($mes=unlink($filename)?'删除成功':'删除失败 查看权限'):'';
   echo $mes;
   exit();
}else{
   echo '密码错误！';
   exit;
}
}
function Jump($file)//跳过文件
{
global $jump,$safearr;
if($jump != '')
{
    foreach($safearr as $v)
    {
   if($v=='') continue;
   if( eregi($v,$file) ) return true ;
    }
}
return false;
}
?>
<a href="scandir.php">[查看文件改动]</a>|<a href="scandir.php?savethis=1">[保存当前文件指纹]</a>|<a href="scandir.php?check=check">[扫描可疑文件]</a>

disable_functions =  phpinfo,passthru,exec,system,chroot,chgrp,chown,shell_exec,proc_open,proc_get_status,ini_alter,ini_alter,ini_restore,dl,pfsockopen,openlog,syslog,readlink,symlink,popepassthru,stream_socket_server,fsocke,popen,proc_close,curl_exec,curl_multi_exec,parse_ini_file,show_source,dl,escapeshellarg,escapeshellcmd

server
{
    listen       80;
    server_name  www.***.com;
    index   index.htm index.html index.php;
    root  /wwwroot/;
    
 
      
    rewrite ^([^\.]*)/topic-(.+)\.html$ $1/portal.php?mod=topic&topic=$2 last;
    rewrite ^([^\.]*)/article-([0-9]+)-([0-9]+)\.html$ $1/portal.php?mod=view&aid=$2&page=$3 last;
    rewrite ^([^\.]*)/forum-(\w+)-([0-9]+)\.html$ $1/forum.php?mod=forumdisplay&fid=$2&page=$3 last;
    rewrite ^([^\.]*)/thread-([0-9]+)-([0-9]+)-([0-9]+)\.html$ $1/forum.php?mod=viewthread&tid=$2&extra=page%3D$4&page=$3 last;
    rewrite ^([^\.]*)/group-([0-9]+)-([0-9]+)\.html$ $1/forum.php?mod=group&fid=$2&page=$3 last;
    rewrite ^([^\.]*)/space-(username|uid)-(.+)\.html$ $1/home.php?mod=space&$2=$3 last;
    rewrite ^([^\.]*)/([a-z]+)-(.+)\.html$ $1/$2.php?rewrite=$3 last;
    rewrite ^([^\.]*)/topic-(.+)\.html$ $1/portal.php?mod=topic&topic=$2 last;
        
 
        location ~ ^/images/.*\.(php|php5)$
                {
              deny all;
                }
 
        location ~ ^/static/.*\.(php|php5)$
                {
               deny all;
                }
 
        location ~* ^/data/(attachment|avatar)/.*\.(php|php5)$
            {
                deny all;
            }
 
    location ~ .*\.(php|php5)?$
    {      
      fastcgi_pass  127.0.0.1:9000;
      fastcgi_index index.php;
      include fcgi.conf;
    }
    
        
 
error_page  400 /404.html;
error_page  403 /404.html;
error_page  404 /404.html;
error_page  405 /404.html;
error_page  408 /404.html;
error_page  410 /404.html;
error_page  411 /404.html;
error_page  412 /404.html;
error_page  413 /404.html;
error_page  414 /404.html;
error_page  415 /404.html;
error_page  500 /404.html;
error_page  501 /404.html;
error_page  502 /404.html;
error_page  503 /404.html;
error_page  506 /404.html;
 
 
log_format  acclog    "$remote_addr $request_time $http_x_readtime [$time_local] \"$request_method http://$host$request_uri\" $status $body_bytes_sent \"$http_referer\" \"$http_user_agent\"";
        access_log  /logs/access.log  acclog;
}

location ~ ^/images/.*\.(php|php5)$
{
  deny all;
}

location ~ .*\.(php|php5)?$
{      
  fastcgi_pass  127.0.0.1:9000;
  fastcgi_index index.php;
  include fcgi.conf;
}