Unclassified White House computers are latest in the list of security breaches this year. Prime suspects for the breach are Russian hackers, who are working to carry out attacks on worlds most sensitive systems belonging to NATO, the Ukrainian government and U.S. defense contractors. White House officials reported no damages to the systems as they found no evidence of any security breach. All the leading US agencies (FBI, Secret Service and National Security Agency) are employed to investigate this breach. Though such an attack was always on cards as US has always kept Russians on top-tier in terms of cyber capabilities.”]
Source: https://www.hackread.com/russian-hackers-hack-white-house-computers/