In December 2011, "Anonymous" attacked the global intelligence company known as "Stratfor" and consequently disclosed a veritable treasure trove of data including hundreds of gigabytes of email and tens of thousands of credit card details which were promptly used by the attackers to make charitable donations (among other uses). The breach also included 860,000 user accounts complete with email address, time zone, some internal system data and MD5 hashed passwords with no salt.
Accounts breached: 859777
Breached on: December 24, 2011
Exposed data: Credit cards, Email addresses, Names, Passwords, Phone numbers, Physical addresses, and Usernames
Added on: December 04, 2013