Two new email worms are attempting to exploit fans of Singapore-born singer Stefanie Sun Yanzi, said to be a big name star in Asia.

The Favsin-A worm begs the singer to contact the virus writer, while the Yanz-A worm spreads via email posing as the video or MP3 music file of one of Sun Yanzi's popular hits.

"Stefanie Sun Yanzi isn't as well known in the West as she is in many Asian countries, which means the worm's choice of celebrity is limiting its potential to spread," said Graham Cluley, senior technology consultant for Sophos. "But all computer users should be suspicious of unsolicited email attachments and ensure their anti-virus protection is up-to-date."

Security company PandaLabs has also issued a separate warning over three new worms that use social engineering tricks to distract users while they distribute from infected computers and delete a large number of system files.

The Tasin.A worm displays windows with messages that give the impression that it is some kind of game, yet it is programmed to delete a large number files and makes a Windows Registry entry to ensure it is run on every system start-up.

Tasin.B and Tasin.C are variants that are similar to the original. When you run the file containing Tasin.B, a message is displayed saying the document is corrupt, while Tasin.C downloads and displays an erotic image of Madrid party girl Nuria Bermudez.

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