https://www.mtgox.com/press_release_20110630.html https://www.mtgox.com/press_release_20110630.html "On June 20th at approximately 3:00am JST (Japan Time), an

https://www.mtgox.com/press_release_20110630.html https://www.mtgox.com/press_release_20110630.html "On June 20th at approximately 3:00am JST (Japan Time), an unknown person logged in to the compromised admin account, and with the permissions of that account was able to arbitrarily assign himself a large number of Bitcoins"