An attack against the company's accounting department could have involved a fraudulent wire transfer. Cybercriminals have proved adept at making fraudulent transactions by compromising email systems and login credentials, making it appear legitimate employees have initiated or approved large transfers. Banks have been losing money from wire transfers for years. Prior to the Internet, it was from wire taps on leased lines. They spent a small fortune on electronics to detect the wire taps. The Internet age just introduced a new way of doing fraud. Someone will always figure out a way to defeat the better mouse trap. I will add that logistically, fraud is much easier to perform in the Internet age.
It's the same old "CEO fraud" trick that is being used. They often install trojans in order to successfully attack these companies, see link. https://www.wilderssecurity.com/thre...ed-hips-discussion.372859/page-7#post-2502049