What is ' Bom Sabado ' ?

Bom Sabado worm, it is a JavaScript based worm that spreads itself through Orkut scraps (the Orkut equivalent of a Facebook wall scribble). The worm is an auto generated message which might look like just another scrap from your buddy. The scrap actually embeds a malicious JavaScript code which infects the profile of the person as soon as he opens the scrap page. Soon after this, the code is executed and it will make the user join bot communities automatically. The worm then starts posting similar scraps to the user's friends using his name, thereby spreading itself. - Techtree.com