Researchers at Google analyzed the attack traffic over several weeks and found that the attackers used both Javascript replacement and HTML injections. The high-profile DDoS attack against GitHub that went on for several days last month was the end result of an operation that included several phases and extensive testing and optimization by the attackers. Researchers said that the attack wouldn t have been possible if all of the Web s links were encrypted. The attackers, who are widely believed to be affiliated with the Chinese government, added several more hosts to the target list.
Source: https://threatpost.com/google-provides-detailed-analysis-of-github-attack-traffic/112427/