Valcard is a mass-mailing worm. It is written in Visual Basic and is packed with UPX file compressor. The worm disguises itself as Macromedia Flash player, it is supposed to play a sound file and show a cute image (this functionality sometimes fails due to a bug in worm's code).
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
The worm spreads itself in email with different subjects and bodies and an attachment named 'ValentineCard.exe'. The worm collects email addresses from Outlook Address Book and sends itself to all these addresses.
Valcard worm installs itself to system as 'ValentineCard.exe' and modifies Windows Registry to be run in all Windows sessions. On Thursdays the worm is supposed to extract and show a strange JPG image, but this fails due to a bug as the worm extracts sound file data into a picture file.
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