FortiGuard Global Security Research has detected a new virus worm for Symbian OS smartphones.  The worm, called SymbOS/Beselo.A!worm, has been detected spreading across Symbian S60 enabled devices.

According to FortiGuard, after the worm installs, it harvests contacts from the handset and sends a viral MMS carrying a SIS-packed (Symbian Installation Source) version of the worm, disguised as a multimedia file with names such as Beauty.jpg, Sex.mp3 or Love.rm.

In addition to harvesting the numbers stored in the phone’s address book, the Beselo worm sends itself to generated numbers as well, which according to FortiGaurd are all located in China and belong to the same mobile phone operator.

Users may know they have been infected if they see unrecognized sent messages in their MMS outboxes; wireless devices need to be configured to save such messages.