Hacked accounts not contract!
The Steem protocol (the "coin") was not hacked, nor was any smart contract running on top of the Steem protocol. This hack is a website hack where a hacker stole funds and account credentials, and not a hack on the coin itself, at least according to the best information available when this article was written.
How would we know if our account was compromised or not? Just by looking in the wallet? And how would we know if our credentials were stolen?
Look at your wallets transaction history for suspicious activity.