Two hackers, Connor Moucka and John Binns, have been identified and charged with stealing around 50 billion customer call and text records from AT&T.
The stolen records were taken from AT&T's systems hosted on Snowflake, a provider of cloud services for data analysis.
The indictment reveals that the hackers accessed billions of sensitive customer records and successfully extorted at least three victims.
AT&T is one of several companies who had sensitive data stolen from their Snowflake instances, making these Snowflake-related breaches some of the worst cyberattacks of the year.