At the time of the incident, Uber was negotiating with U.S. regulators investigating separate claims of privacy violations. Uber now says it had a legal obligation to report the hack to regulators and to drivers whose license numbers were taken. Instead, the company paid hackers to delete the data and keep the breach quiet. Uber said it believes the information was never used but declined to disclose the identities of the attackers.
Uber Paid Hackers to Delete Stolen Data on 57 Million People – Bloomberg