data is from many breaches from the past like this twitter breach that happened in 2021
"A massive Twitter data breach last year, exposing more than five million phone numbers and email addresses, was worse than initially reported"
https://counter.social/@ecksmc/109406475556968906
data from most breaches end up on darkweb for sale - researchers then get a hold of it - and bad actors
someone has obviously gotten hold of a load of data from a load of breaches and put them together
@Armchaircouch @disk4mat
It actually isn't as bad as it sounds - The leak is in fact a compiled collection of data from thousands of previous breaches, and doesn't appear to contain any new information.
https://counter.social/@ecksmc/111804295103740607