In July 2015, Ashley Madison, a Canadian online dating service marketed to people who are married or in relationships, was hacked by a group calling itself The Impact Team. The breach led to the release of personal details of more than 30 million user accounts.
The Impact Team threatened to release customer data unless the site was shut down. When the site owners did not comply, the group followed through on its threat, releasing user data, including names, addresses, and transaction records.
The breach highlighted the importance of maintaining robust data security measures and the potential reputational damage that can result from such an event.
Further Reading:
https://www.wired.com/2015/08/happened-hackers-posted-stolen-ashley-madison-data/
https://krebsonsecurity.com/2022/07/a-retrospective-on-the-2015-ashley-madison-breach/