The agency said a new string of phishing e-mails is making the rounds this holiday season.
Phishing is an online scam where hackers create valid-looking e-mails, usually to trick recipients into revealing private information.
The bureau warns of recent phishing e-mails that appear to come from shippers including FedEx, UPS and Wal-Mart.
The subject line suggests there was a problem with a delivery and the recipient should open an attachment for further instructions. The attachment contains a computer virus.
Other false e-mails look like surveys or e-cards.

