Leaker says they are offering private details of 500 million Facebook users

A leaker says they are offering information on more than 500 million Facebook Inc users – including phone numbers and other data – virtually for free.

The database appears to be the same set of Facebook-linked telephone numbers that has been circulating in hacker circles since January and whose existence was first reported by tech publication Motherboard, according to Alon Gal, co-founder of Israeli cybercrime intelligence firm Hudson Rock.

A leaker says they are offering information on more than 500 million Facebook Inc users – including phone numbers and other data – virtually for free. Maha Albadrawi reports.

Reuters was not immediately able to vet the information, which is being offered for a few euros’ worth of digital credit on a well-known site for low-level hackers, but Gal said on Saturday that he had verified the authenticity of at least some of the data by comparing it against phone numbers of people he knew. Other journalists say they have also been able to match known phone numbers to the details in the data dump.

In a statement, Facebook said that the data was “very old” and related to an issue that it had fixed in August 2019.

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An attempt by Reuters to reach the leaker over the messaging service Telegram was not immediately successful.

Gal told Reuters that Facebook users should be alert to “social engineering attacks” by people who may have obtained their phone numbers or other private data in the coming months.

News of the latest leak was first reported by Business Insider.

(Reporting by Raphael Satter in Washington; Additional reporting by Sabahatjahan Contractor in Bengaluru; Editing by Matthew Lewis and Daniel Wallis)