Notice I said “breached” and not “hacked”!
I did this because hacked means something beyond social engineered or more specifically phished.
FireEye which is a huge (if not the biggest) Cyber Security firm.
They annouced a few days ago that they were breached and their data was stolen.
This included internal techniques, tools and procedures (TTPs)
They released IoCs y’all should add to your ID/PS’s and etc which are linked HERE
Obviously no-one would be surprised if they intermingled.
Anyway, here are some good articles on the fireeye breach.