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.
The worm uses the Outlook e-mail application to spread. LoveLetter is also an overwriting VBS virus and it spreads using a mIRC client as well.
When it is executed, it first copies itself to the Windows System directory as: