More than two dozen databases stolen from online shops in various countries are being offered for sale on a public website. In total, the seller provides over 1.5 million rows of records but the amount of stolen data is much larger. The attacker is hacking into insecure servers that are reachable over the public web, copies the databases, and leaves a note asking for a ransom in return of the stolen data. Victims have 10 days to pay BTC 0.06 ($525 at current price) a wallet provided in the ransom note, else the hacker makes the database public.
Source: https://www.bleepingcomputer.com/news/security/hacker-extorts-online-shops-sells-databases-if-ransom-not-paid/