In July 2015, a group calling itself "The Impact Team" stole the user ... - dofaq.co
ashley madison data breach

In July 2015, a group calling itself "The Impact Team" stole the user ...

wikipedia - 26 Aug 2015
In July 2015, a group calling itself "The Impact Team" stole the user data of Ashley Madison, a commercial website billed as enabling extramarital affairs. The group copied personal information about the site's user base and threatened to release users' names and personally identifying information if Ashley Madison was not immediately shut down. On 18 and 20 August, the group leaked more than 25 gigabytes of company data, including user details.

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