编程 PHP

PHP实现webshell扫描文件木马的方法

Posted in PHP onJuly 31, 2017

本文实例讲述了PHP实现webshell扫描文件木马的方法。分享给大家供大家参考，具体如下：

可扫描 weevelyshell 生成或加密的shell 及各种变异webshell

目前仅支持php

支持扫描 weevelyshell 生成或加密的shell
支持扫描callback一句话shell
支持各种php大马

<!DOCTYPE html>
<html>
<head>
    <meta charset='gb2312'>
    <title>PHP web shell scan</title>
</head>
<body>
</body>
<?php
define("SELF",php_self());
error_reporting(E_ERROR);
ini_set('max_execution_time',20000);
ini_set('memory_limit','512M');
header("content-Type: text/html; charset=gb2312");
function weevelyshell($file){
    $content=file_get_contents($file);
    if(
        (
        preg_match('#(\$\w{2,4}\s?=\s?str_replace\("\w+","","[\w_]+"\);\s?)+#s',$content)&&
      preg_match('#(\$\w{2,4}\s?=\s?"[\w\d\+\/\=]+";\s?)+#',$content)&&               preg_match('#\$[\w]{2,4}\s?=\s\$[\w]{2,4}\(\'\',\s?\$\w{2,4}\(\$\w{2,4}\("\w{1,4}",\s?"",\s?\$\w{2,4}\.\$\w{2,4}\.\$\w{2,4}\.\$\w{2,4}\)\)\);\s+?\$\w{2,4}\(\)\;#',$content))
          ||
          (preg_match('#\$\w+\d\s?=\s?str_replace\(\"[\w\d]+\",\"\",\"[\w\d]+\"\);#s',$content)&&
        preg_match('#\$\w+\s?=\s?\$[\w\d]+\(\'\',\s?\$[\w\d]+\(\$\w+\(\$\w+\(\"[[:punct:]]+\",\s?\"\",\s?\$\w+\.\$\w+\.\$\w+\.\$\w+\)\)\)\);\s?\$\w+\(\);#s',$content))
        ){
        return true;
    }
}
function callbackshell($file){
    $content=file_get_contents($file);
    if(
        preg_match('#\$\w+\s?=\s?\$_(?:GET|POST|REQUEST|COOKIE|SERVER)\[.*?\]#is',$content)&&
        preg_match('#\$\w+\s?=\s?(?:new)?\s?array\w*\s?\(.*?_(?:GET|POST|REQUEST|COOKIE|SERVER)\[.*?\].*?\)+#is',$content)&&
        preg_match('#(?:array_(?:reduce|map|udiff|walk|walk_recursive|filter)|u[ak]sort)\s?\(.*?\)+?#is',$content)
        )
            return true;
}
function php_self(){
  $php_self=substr($_SERVER['PHP_SELF'],strrpos($_SERVER['PHP_SELF'],'/')+1);
  return $php_self;
}
$matches = array(
        '/mb_ereg_replace\([\'\*\s\,\.\"]+\$_(?:GET|POST|REQUEST|COOKIE|SERVER)\[[\'\"].*?[\'\"][\]][\,\s\'\"]+e[\'\"]'/is,
        '/preg_filter\([\'\"\|\.\*e]+.*\$_(?:GET|POST|REQUEST|COOKIE|SERVER)/is',
        '/create_function\s?\(.*assert\(/is',
        '/ini_get\(\'safe_mode\'\)/i',
        '/get_current_user\(.*?\)/i',
        '/@?assert\s?\(\$.*?\)/i',
        '/proc_open\s?\(.*?pipe\',\s?\'w\'\)/is',
    '/sTr_RepLaCe\s?\([\'\"].*?[\'\"],[\'\"].*?[\'\"]\s?,\s?\'a[[:alnum:][:punct:]]+?s[[:alnum:][:punct:]]+?s[[:alnum:][:punct:]]+?e[[:alnum:][:punct:]]+?r[[:alnum:][:punct:]]+?t[[:alnum:][:punct:]]+?\)/i',
        '/preg_replace_callback\(.*?create_function\(/is',
        '/filter_var(?:_array)?\s?.*?\$_(?:GET|POST|REQUEST|COOKIE|SERVER)\[[\'\"][[:punct:][:alnum:]]+[\'\"]\][[:punct:][:alnum:][:space:]]+?assert[\'\"]\)/is',
        '/ob_start\([\'\"]+assert[\'\"]+\)/is',
        '/new\s?ReflectionFunction\(.*?->invoke\(/is',
      '/PDO::FETCH_FUNC/',
        '/\$\w+.*\s?(?:=|->)\s?.*?[\'\"]assert[\'\"]\)?/i',
        '/\$\w+->(?:sqlite)?createFunction\(.*?\)/i',
        '/eval\([\"\']?\\\?\$\w+\s?=\s?.*?\)/i',
        '/eval\(.*?gzinflate\(base64_decode\(/i',
        '/copy\(\$HTTP_POST_FILES\[\'\w+\'\]\s?\[\'tmp_name\'\]/i',
        '/register_(?:shutdown|tick)_function\s?\(\$\w+,\s\$_(?:GET|POST|REQUEST|COOKIE|SERVER)\[.*?\]\)/is',
        '/register_(?:shutdown|tick)_function\s?\(?[\'\"]assert[\"\'].*?\)/i',
        '/call_user_func.*?\([\"|\']assert[\"|\'],.*\$_(?:GET|POST|REQUEST|COOKIE|SERVER)\[[\'|\"].*\]\)+/is',
      '/preg_replace\(.*?e.*?\'\s?,\s?.*?\w+\(.*?\)/i',
    '/function_exists\s*\(\s*[\'|\"](popen|exec|proc_open|system|passthru)+[\'|\"]\s*\)/i',
    '/(exec|shell_exec|system|passthru)+\s*\(\s*\$_(\w+)\[(.*)\]\s*\)/i',
    '/(exec|shell_exec|system|passthru)+\s*\(\$\w+\)/i',
    '/(exec|shell_exec|system|passthru)\s?\(\w+\(\"http_.*\"\)\)/i',
         '/(?:john\.barker446@gmail\.com|xb5@hotmail\.com|shopen@aventgrup\.net|milw0rm\.com|www\.aventgrup\.net|mgeisler@mgeisler\.net)/i',
      '/Php\s*?Shell/i',
    '/((udp|tcp)\:\/\/(.*)\;)+/i',
    '/preg_replace\s*\((.*)\/e(.*)\,\s*\$_(.*)\,(.*)\)/i',
    '/preg_replace\s*\((.*)\(base64_decode\(\$/i',
    '/(eval|assert|include|require|include_once|require_once)+\s*\(\s*(base64_decode|str_rot13|gz(\w+)|file_(\w+)_contents|(.*)php\:\/\/input)+/i',
    '/(eval|assert|include|require|include_once|require_once|array_map|array_walk)+\s*\(.*?\$_(?:GET|POST|REQUEST|COOKIE|SERVER|SESSION)+\[(.*)\]\s*\)/i',
    '/eval\s*\(\s*\(\s*\$\$(\w+)/i',
      '/((?:include|require|include_once|require_once)+\s*\(?\s*[\'|\"]\w+\.(?!php).*[\'|\"])/i',
    '/\$_(\w+)(.*)(eval|assert|include|require|include_once|require_once)+\s*\(\s*\$(\w+)\s*\)/i',
    '/\(\s*\$_FILES\[(.*)\]\[(.*)\]\s*\,\s*\$_(GET|POST|REQUEST|FILES)+\[(.*)\]\[(.*)\]\s*\)/i',
    '/(fopen|fwrite|fputs|file_put_contents)+\s*\((.*)\$_(GET|POST|REQUEST|COOKIE|SERVER)+\[(.*)\](.*)\)/i',
    '/echo\s*curl_exec\s*\(\s*\$(\w+)\s*\)/i',
    '/new com\s*\(\s*[\'|\"]shell(.*)[\'|\"]\s*\)/i',
    '/\$(.*)\s*\((.*)\/e(.*)\,\s*\$_(.*)\,(.*)\)/i',
    '/\$_\=(.*)\$_/i',
    '/\$_(GET|POST|REQUEST|COOKIE|SERVER)+\[(.*)\]\(\s*\$(.*)\)/i',
    '/\$(\w+)\s*\(\s*\$_(GET|POST|REQUEST|COOKIE|SERVER)+\[(.*)\]\s*\)/i',
    '/\$(\w+)\s*\(\s*\$\{(.*)\}/i',
    '/\$(\w+)\s*\(\s*chr\(\d+\)/i'
);
function antivirus($dir,$exs,$matches) {
    if(($handle = @opendir($dir)) == NULL) return false;
    while(false !== ($name = readdir($handle))) {
        if($name == '.' || $name == '..') continue;
        $path = $dir.$name;
        if(strstr($name,SELF)) continue;
        //$path=iconv("UTF-8","gb2312",$path);
        if(is_dir($path)) {
            //chmod($path,0777);/*主要针对一些0111的目录*/
            if(is_readable($path)) antivirus($path.'/',$exs,$matches);
        } elseif(strpos($name,';') > -1 || strpos($name,'%00') > -1 || strpos($name,'/') > -1) {
            echo '特征 <input type="text" style="width:250px;" value="解析漏洞">     '.$path.'<div></div>'; flush(); ob_flush();
        }
        else {
            if(!preg_match($exs,$name)) continue;
            if(filesize($path) > 10000000) continue;
            $fp = fopen($path,'r');
            $code = fread($fp,filesize($path));
            fclose($fp);
            if(empty($code)) continue;
            if(weevelyshell($path)){
            echo '特征 <input type="text" style="width:250px;" value="weevely 加密shell">     '.$path.'<div></div>'; flush(); ob_flush();
        }elseif(callbackshell($path)){
                echo '特征 <input type="text" style="width:250px;" value="Callback shell">     '.$path.'<div></div>'; flush(); ob_flush();
        }
            foreach($matches as $matche) {
                $array = array();
                preg_match($matche,$code,$array);
                if(!$array) continue;
                if(strpos($array[0],"\x24\x74\x68\x69\x73\x2d\x3e")) continue;
                $len = strlen($array[0]);
                if($len > 6 && $len < 200) {
                    echo '特征 <input type="text" style="width:250px;" value="'.htmlspecialchars($array[0]).'">    '.$path.'<div></div>';
                    flush(); ob_flush(); break;
                }
            }
            unset($code,$array);
        }
    }
    closedir($handle);
    return true;
}
function strdir($str) { return str_replace(array('\\','//','//'),array('/','/','/'),chop($str)); }
echo '<form method="POST">';
echo '路径: <input type="text" name="dir" value="'.($_POST['dir'] ? strdir($_POST['dir'].'/') : strdir($_SERVER['DOCUMENT_ROOT'].'/')).'" style="width:398px;"><div></div>';
echo '后缀: <input type="text" name="exs" value="'.($_POST['exs'] ? $_POST['exs'] : '.php|.inc|.phtml').'" style="width:398px;"><div></div>';
echo '操作: <input type="submit" style="width:80px;" value="scan"><div></div>';
echo '</form>';
if(file_exists($_POST['dir']) && $_POST['exs']) {
    $dir = strdir($_POST['dir'].'/');
    $exs = '/('.str_replace('.','\\.',$_POST['exs']).')/i';
    echo antivirus($dir,$exs,$matches) ? '</br ><div></div>扫描完毕!' : '</br > <div></div>扫描中断';
}
?>
</html>

希望本文所述对大家PHP程序设计有所帮助。

PHP实现webshell扫描文件木马的方法

- Author -

无法自拔

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

PHP 相关文章推荐

通过对php一些服务器端特性的配置加强php的安全

Oct 09 PHP

剖析 PHP 中的输出缓冲

Dec 21 PHP

php面向对象全攻略（五）封装性

Sep 30 PHP

PHP simple_html_dom.php+正则采集文章代码

Dec 24 PHP

php 地区分类排序算法

Jul 01 PHP

PHP使用Alexa API获取网站的Alexa排名例子

Jun 12 PHP

PHP获取MySql新增记录ID值的3种方法

Jun 24 PHP

PHP实现根据数组某个键值大小进行排序的方法

Mar 13 PHP

PHP如何通过表单直接提交大文件详解

Jan 08 PHP

PHP示例演示发送邮件给某个邮箱

Apr 03 PHP

PHP常用的类封装小结【4个工具类】

Jun 28 PHP

PHP中类与对象功能、用法实例解读

Mar 27 PHP

PHP/ThinkPHP实现批量打包下载文件的方法示例

Jul 31 #PHP

Thinkphp结合AJAX长轮询实现PC与APP推送详解

Jul 31 #PHP

php实现将二维关联数组转换成字符串的方法详解

Jul 31 #PHP

微信接口生成带参数的二维码

Jul 31 #PHP

PHP判断一个数组是另一个数组子集的方法详解

Jul 31 #PHP

PHP中TP5 上传文件的实例详解

Jul 31 #PHP

PHP 中TP5 Request 请求对象的实例详解

Jul 31 #PHP