According to Barracuda Labs, Hasbro’s website has been compromised and infecting visitors’ computers with malware via a java exploit. If you visited Hasbro’s website lately, we recommend to update your antivirus and do a full scan of the system, but beware, not all antivirus appear to detect the threat, exemple : Microsoft Security Essentials (Distributed with Windows since Windows 8) and Kaspersky can’t detect it at the time I write those lines.

You can find a scan of the threat on VirusTotal, with a complete list of antivirus that detect (or not) the threat.