In Google I/O 2016, new functionality "Pre-Report" was introduced in Google Play Developer Console. When alpha/beta apk is uploaded there, then various devices with different OS installs the apk and inspect the app by running it just like our users. Not only the result of manipulation including crash events will be reported on Pre-Report, but also vulnerability scan will be conducted. I was curious what type of scan will be done, and this presentation is the first report.