'Koo App releases personal data, email, marital status,' says ethical hacker Elliot Alderson Koo App: Along with three screenshots, Elliot Alderson tweeted, you asked so I did it. I spent 30 min on this new Koo app BusinessToday.In | February 11, 2021 | Updated 10:33 IST Ethical hacker Elliot Alderson tests Koo App Ethical hacker Elliot Alderson, who exposed flaws in Aadhaar as well as the Aarogya Setu app, has now tested the Indian microblogging site Koo. Alderson said that his followers urged him to test Koo App and so he did. In a tweet, Alderson said that he found that the app is leaking personal data of its users.