when they clicked on links in email that seemed to come fromAttack.Phishingpeople they knew . The attacksAttack.Databreachenabled the hackers to stealAttack.Databreachconfidential information by penetrating email accounts and internal systems . The attacks in Norway only make up 2 percent of attacks on military and political institutions , DN reported , but local authorities are on high alert for more . The US ’ FBI , CIA and NSA have all described the attacks as the largest Russian attempt to gain influence in the US ever . Russian authorities from President Vladimir Putin ’ s office on down have vigorously denied they ’ re behind the hacking . In addition to the attacks on foreign ministry and military interests , email accounts at Norway ’ s Greens Party ( Miljøpartiet De Grønne , MDG ) were hacked last June and the attacker gained access to the party ’ s membership register . A few weeks later , Norway ’ s Socialist Left party ( SV ) was also attacked , with the hackers gaining access to SV ’ s membership register as well . A false profile was established ono the party ’ s internal debate forum . Both attacks remain under investigation , according to the Oslo Police District . “ It can seem that security is not good enough , ” Grandhagen told DN , but it ’ s demanding and expensive for such organizations to fend off the hackers . Norwegian political parties aren ’ t required by law to test their data systems for possible penetration . “ Information that should not or must never come out should never be sent via Hotmail or email that ’ s not classified , ” Bernsen said .