Withdrawals were already automatically disabled by the risk management system, none of the withdrawals successfully went out. Additionally, the VIA coins deposited by the hackers were also frozen. Not only did the hacker not steal any coins out, their own coins have also been withheld. After a thorough security check by Binance, they resumed withdrawals. Trading functionality was never affected.
Regardless of Binance’s fast reaction though, the damage was done and the market dropped in reaction to the initial scare in addition to further regulation in the US. Bitcoin hit a recent low of $9,468 and the rest of the altcoins tumbled as well.