Report: The State Department has a hacker problem

 Three months after the U.S. State Department confirmed hackers breached its unclassified email system, the government has still not been able to evict them from the network, the Wall Street Journal reported on Thursday, citing three people familiar with the investigation.

Government officials, assisted by outside contractors and the National Security Agency, have repeatedly scanned the network and taken some systems offline, the Journal reported. But investigators still see signs of the hackers on State Department computers, the people familiar with the matter told the paper.

Each time investigators find a hacker tool and block it, the intruders tweak it slightly to attempt to sneak past defenses, the Journal reported. It is not clear how much data the hackers have taken.