It is a HACK that occurred by accident or on purpose.

The $150 million is hacked and unusable i never said stole neither does title says the amount that was effected.

Definition of hacking:

Hacking is unauthorized intrusion into a computer or a network. The person engaged in hacking activities is generally referred to as a hacker. This hacker may alter system or security features to accomplish a goal that differs from the original purpose of the system.

Source:techopedia.com