Be aware of the Valentine's Day e-cards you received lately, according to an Internet security company, virus was found attached to Valentine's Day e-cards, with cute puppies and touching lines as disguise.

Ahead of the Valentine's Day, it is common to find vicious computer virus attached to e-cards, noted David Beveridge, professional from the McAfee, a leading company in internet security and virus detection.

The recent most seen fraud e-card is the one with a couple of lovely puppies and the byline says the card is sent from your mother, asking recipient to download the card according to the instructions, Beveridge said during an interview with the media.

If recipients do download the card, what they will get is nothing but malicious software.

Hackers can spread the virus to the world through popular networks, such as Facebook, Twitter and MySpace, Beveridge said, adding that most commonly by requesting recipients to download a certain video or picture file.

Many people did not realise that their computer was hacked or infected until one day they found fraudulent charges on credit cards and were charged in overseas countries, Beveridge stressed, reminding public to be careful of the e-cards they receive.