Yahoo’s postmortem into one of the largest data breaches of all time continues to reveal damning information. In a Nov. 9 filing to the Securities and Exchange Commission, Yahoo says it believes a state-sponsored attacker was in its network in 2014. The disclosure complicates Yahoo’s recovery from the breach, which has cost the company $1 million so far. The company is facing 23 putative consumer class-action suits in U.S. federal and state courts by people who claim to have been harmed by the breach.”]
Source: https://www.healthcareinfosecurity.com/yahoo-spotted-mega-breach-in-2014-a-9515