Yahoo hack how it happened

yahoo hack how it happened with Russian hackers pleading guilty. The Yahoo hack was the largest single data breach in history with about 3 billion user records stolen. We learned how it happened because the US government charged three Russian and one Canadian citizen with the crime. The key to the hacker's success was a piece of malware in an email attachment. A single click on a phishing attack was enough to begin the infiltration. The hackers were Alexsey Belan and Russian FBS officers Dmitry Dokuchaev and Igor Sushchin.