The main technique that was used is called social engineering. It is based on a manipulation to force the user to make a mistake and, as a result, get access to private information, including passwords, emails, logins, and other valuables. Social engineering is very popular in the IT industry, especially when criminals introduce themselves as employers, managers of unknown companies, etc. Their main goal - force people to make a mistake and give them personal data or even money. If the main goal is to get inside the system, the data would be their main goal. Like the Uber cyber breach, it could happen to any organization or platform if the hacker knows where to start.