The massive hack into federal systems announced last week was far deeper and potentially more problematic than publicly acknowledged, with hackers believed to be from China moving through government databases undetected for more than a year, sources briefed on the matter told ABC News.
“If [only] they knew the full extent of it,” one U.S. official said about those affected by the intrusion into the Office of Personnel Management’s information systems.
It all started with an initial intrusion into OPM’s systems more than a year ago, and after gaining that initial access the hackers were able to work their way through four different “segments” of OPM’s systems, according to sources.
Much of that data has been stored on OPM systems housed by the Department of the Interior in a Denver-area data center, sources said. And one of the four “segments” compromised held forms filled out by federal employees seeking security clearances.