According to CNN, White House officials state that this story does not refer to a new incident and that the story which broke on CNN is speculation in regards to an attack which took place in October, but was discovered more recently.
National Security Council spokesman Mark Stroh refused to confirm Russian involvement.
“In this case, as we made clear at the time, we took immediate measures to evaluate and mitigate the activity,” he said. “As has been our position, we are not going to comment on [this] article’s attribution to specific actors.”
The hackers gained access to such things as real-time, non-public details concerning the President’s whereabouts.
“We have an unclassified system and then we have a classified system, a top secret system,” said Ben Rhodes, deputy White House National Security Advisor. “We do not believe that our classified systems were compromised.”
The fact that classified information is kept on a separate system isolated it from this breach, which is considered by investigators involved to be one of the most sophisticated ever launched against U.S. government systems.
According to CNN, investigators say that codes and other markers left behind by the hackers lead them to believe there was Russian involvement, but so far there has been no-comment from Moscow.