The hack is still not fully understood and is being analyzed. It doesn't help that Github suspended everything, including the original maintainer's account (who is believed to be a victim of social engineering).

Anyway, you will eventually see a post mortem. I'm willing to bet that it's going to be as phenomenal as the hack itself. The case and its investigation is going to be a classic case study for all security researchers and security-minded users. Anyway, I doubt that the attackers will ever be found. Jia Tan, Jigar Kumar and others are going to remain as ghosts like Satoshi Nakamoto.