Virus-like program that spreads automatically to other computers by sending itself out by email or by any other means. A program that propagates itself by attacking other machines and copying itself to the affected machine.
Worms have self-replicating code that travels from machine to machine by various means. A worms first objective is merely propagation. Worms can be destructive depending on what payload they have been given. Worms may replace files, but do not insert themselves into files.
W32.PapaiWorm propagates through Skype by sending infection URL to contacts. The worm shows a .jpg file, which deceives the user from the infection. The worm catches all the contact information and send the infection URL to all with emotions and scraps. It also changes the status message to ?Do Not Disturb?.This particular worm drops many other binaries to the victims machine.