I have been a victim of a phishing attack today, and the perpetrator stole my bitcoin hosted at coinbase.com. I have an IP address that the attacker used. Is there anything I can do? Any info would be helpful.
If you have the private keys for your addresses that were holding your bitcoin, transfer them immediately to a new address. On the compromised computer, cease all online work until you are certain the phishing malware has been removed.
If they have already been removed by the thief, then there is not much you can do. You can file a police report, but the likelihood of getting your coin back is about the same as if someone stole your physical wallet out of your pocket.
In theory, there is a lot more you can do, but the justice departments of the world have not laid down any protocols for bitcoin theft and are likely never really investigated (most cops probably don't know much more than the average person about bitcoin, anyway).