Additional Details
The autorun.inf includes the name and path of the actual worm executable. When an infected media device (such as a CD, DVD or USB drive) is inserted into the computer, the autorun.inf and consequently the actual malicious program is automatically executed.
In addition to drives on the local computer, an Autorun worm can also spread to remote computers by infecting shared network drives.
Members of the AutoRun family also often contain other functionality in addition to just spreading. In fact this infection method can be used to propagate any malicious payload, such as a backdoor, password stealer, or some other kind of trojan.