Uber said it has contacted US law enforcement after a hacker apparently breached its network.
A security engineer said the intruder provided evidence of obtaining access to crucial systems at the ride-hailing service.
There was no indication that Uber’s fleet of vehicles or its operation was in any way affected.
“It seems like they’ve compromised a lot of stuff,” said Sam Curry, an engineer with Yuga Labs who communicated with the hacker.
That includes complete access to the Amazon and Google-hosted cloud environments where Uber stores its source code and customer data, he said.
Mr Curry said he spoke to several Uber employees who said they were “working to lock down everything internally” to restrict the hacker’s access. That included the San Francisco company’s Slack internal messaging network.
He said there was no indication that the hacker had done any damage or was interested in anything more than publicity. “My gut feeling is that it seems like they are out to get as much attention as possible.”
The hacker had alerted Mr Curry and other security researchers to the intrusion on Thursday evening by using an internal Uber account to comment on vulnerabilities they had previously identified on the company’s network through its bug-bounty programme, which pays ethical hackers to ferret out network weaknesses.
The hacker provided a Telegram account address and Mr Curry and other researchers then engaged them in a separate conversation, sharing screenshots of various pages from Uber’s cloud providers to prove they broke in.
The New York Times reported that the person who claimed responsibility for the hack said they gained access through social engineering. They sent a text message to an Uber worker claiming to be a company tech employee and persuaded the worker to hand over a password that gave them access to the network.
The Times said the hacker reported being 18 years old and saying they broke in because the company had weak security.
One screenshot posted on Twitter and confirmed by researchers shows a chat with the hacker in which they say they obtained the credentials of an administrative user through social engineering, which is a popular hacking strategy, as humans tend to be the weakest link in any network.
Teenagers used a similar ploy in 2020 to hack Twitter.
Uber said via email that it was “currently responding to a cybersecurity incident. We are in touch with law enforcement”.
The company has been hacked before.
Its former chief security officer, Joseph Sullivan, is currently on trial on allegations he arranged to pay hackers 100,000 dollars to cover up a 2016 high-tech heist in which the personal information of about 57 million customers and drivers was stolen.