时间：2021-07-01 10:21:17 帮助过：28人阅读
| 代码如下 | |
/********************** php扫描后门 **********************/ error_reporting(E_ERROR); ini_set('max_execution_time',20000); ini_set('memory_limit','512M'); header("content-Type: text/html; charset=gb2312"); $matches = array( '/function＼_exists＼s*＼(＼s*[＼'|＼"](popen|exec|proc＼_open|system|passthru)+[＼'|＼"]＼s*＼)/i', '/(exec|shell＼_exec|system|passthru)+＼s*＼(＼s*＼$＼_(＼w+)＼[(.*)＼]＼s*＼)/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*＼(＼s*＼$＼_(GET|POST|REQUEST|COOKIE|SERVER|SESSION)+＼[(.*)＼]＼s*＼)/i', '/eval＼s*＼(＼s*＼(＼s*＼$＼$(＼w+)/i', '/(include|require|include＼_once|require＼_once)+＼s*＼(＼s*[＼'|＼"](＼w+)＼.(jpg|gif|ico|bmp|png|txt|zip|rar|htm|css|js)+[＼'|＼"]＼s*＼)/i', '/＼$＼_(＼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+)＼(＼$＼{(.*)＼}/i' ); function antivirus($dir,$exs,$matches) { if(($handle = @opendir($dir)) == NULL) return false; while(false !== ($name = readdir($handle))) { if($name == '.' || $name == '..') continue; $path = $dir.$name; if(is_dir($path)) { if(is_readable($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($code)) continue; foreach($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 > 10 && $len < 1500) { echo ' 特征 '.$path.' ';flush(); ob_flush(); break; } } unset($code,$array); } } closedir($handle); return true; } function strdir($str) { return str_replace(array('＼＼','//','//'),array('/','/','/'),chop($str)); } echo ''; if(file_exists($_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 ';} ?> |
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