How to implement PHP webshell to scan Trojan files-PHP Tutorial-php.cn

本文主要介绍PHP实现webshell扫描文件木马的方法,涉及php针对数值传输的过滤操作与文件识别等相关安全操作技巧,需要的朋友可以参考下，希望能帮助到大家。

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

    PHP web shell scan 
   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  '.$path.'
'; flush(); ob_flush(); } else { if(!preg_match($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  '.$path.'
'; flush(); ob_flush(); }elseif(callbackshell($path)){ echo '特征  '.$path.'
'; flush(); ob_flush(); } foreach($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 && $len < 200) { echo '特征  '.$path.'
'; flush(); ob_flush(); break; } } unset($code,$array); } } closedir($handle); return true; } function strdir($str) { return str_replace(array('\\','//','//'),array('/','/','/'),chop($str)); } echo ''; echo '路径: 
'; echo '后缀: 
'; echo '操作: 
'; echo '
'; if(file_exists($_POST['dir']) && $_POST['exs']) { $dir = strdir($_POST['dir'].'/'); $exs = '/('.str_replace('.','\\.',$_POST['exs']).')/i'; echo antivirus($dir,$exs,$matches) ? '
扫描完毕!' : '
 
扫描中断'; } ?>