Bank executives have said for years that their worst nightmare is a successful cyberattack against the industry. Now they’re watching one unfold across government agencies in what could be one of the biggest hacks in U.S. history.
So far, no evidence has emerged that Wall Street was a victim of the attack, which also hit Microsoft Corp.’s systems. Still, experts say it will take many months, at a minimum, to determine the extent of the infiltration, a stark reminder of the risk that hangs over an industry that’s spent billions to bolster its defenses in recent years.
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