It's going to be difficult to piece together now, they took battle.net down for maintenance and changed the authentication schema. The only comparisons people can make is with old traffic dumps and there's still the variable of the individual account holders security. It is remarkably similar to the Rift launch/hacks though.
Oh and they hotfixed several abilities without any notification again (Smokescreen for DH, some Monk abilities/runes, etc) which is getting tiresome.
Playing: Fallout 4, Warhammer Vermintide Watching: Ash vs Evil Dead