1. Go to Winterfell and enter the Lord's hall. Talk to Maester Luwin.
2. Re-enter the castle, and accept the quest from Roderik Cassel.
3. Go to the Abondoned Village near Dreadfort.
4. After you win the fight against Ramsay Snow, go back to Rodrick Cassel in Winterfell to complete the quest.
When the quest is completed you will get a message that says:
Everybody in Winterfell has heard of your valiant deed. As you leave the castle a huge wolf comes across the yard. It stops before you and licks your hand, before running off again.
Reward: 1000 experience