Bloomberg reports, "The incident began when a picture of a skull appeared on company computer screens, the entertainment website Deadline.com reported yesterday." [1].
Also, the Reddit thread which seems to have started the media firestorm was entitled, "I used to work for Sony Pictures. My friend still works there and sent me this. It's on every computer all over Sony Pictures nationwide." [2] (refers to this picture: https://imgur.com/qXNgFVz).
This leads me to believe that the attacker compromised most/all corporate desktops and exfiltrated data directly from those machines. No better place to get that spreadsheet than directly from the workstation of the employee who works on it daily!
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Bloomberg reports, "The incident began when a picture of a skull appeared on company computer screens, the entertainment website Deadline.com reported yesterday." [1].
Also, the Reddit thread which seems to have started the media firestorm was entitled, "I used to work for Sony Pictures. My friend still works there and sent me this. It's on every computer all over Sony Pictures nationwide." [2] (refers to this picture: https://imgur.com/qXNgFVz).
This leads me to believe that the attacker compromised most/all corporate desktops and exfiltrated data directly from those machines. No better place to get that spreadsheet than directly from the workstation of the employee who works on it daily!
[1]: http://www.bloomberg.com/news/2014-11-24/sony-corp-computers... [2]: https://www.reddit.com/r/hacking/comments/2n9zhv/i_used_to_w...