You may want to think twice before opening certain emails this Valentine's Day.

The Federal Bureau of Investigation said in a press release Tuesday that a virus called the "Storm Worm" may be hidden in fake electronic greeting card messages.

The email directs the recipient to click on a link to retrieve an e-card but instead it downloads viruses. Once the user clicks on the link, the computer becomes part of the Storm Worm "botnet," a place you may not want your personal information to be.

"Botnets are usually set up to facilitate criminal activity such as spam e-mail, identity theft, denial of service attacks and spreading malware to other machines on the Internet," the FBI's statement said.

The Storm Worm virus becomes especially prominent during holidays, since it is easier to lure individuals in with messages of the season.

Always be wary of any email received from an unknown sender. The FBI also recommends deleting unsolicited email without opening it and to never click any links provided.

Concerned? Get the latest information about cyber scams from the FBI Web site. To file a complaint about a spoof email you received, notify the IC3.