But the attackers - a hacker group that goes by the name of “Anti WMD Team” - have published a video proving that they did get away with 828 Gb of files:
Eduard Kovacs reports that the files have not (yet?) been leaked online, but the video shows one of the hackers go through the folders and files they exfiltrated (and put on a hard disk), and among them are files with the company’s financial information, information about its employees, passwords for workstations, networks, and much more.
In the meantime, the corporation has brought the affected sites back online, with some changes. The company's email system has also been restored.
The attack was supposedly mounted as a retaliation for Las Vegas Sands Corp CEO Sheldon Adelson’s speech in which he urged the US government to drop a nuclear bomb on Iran instead of negotiating.
The investigation is still ongoing, and law enforcement has been involved, so additional revelations about compromised data are possible.