【www.bbyears.com--php常用代码】
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
";}
?>