在线扫描php后门_PHP扫描php后门、WebShell、一句话后门等

PHP扫描php后门、WebShell、一句话后门等

PHP web shell scan

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 '.$path.'

}

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.'

}elseif(callbackshell($path)){

echo '特征 '.$path.'

}

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) ? '

}

?>