When searching our Virus Descriptions database for a specific program (e.g., Worm:W32/Example.A), you may be directed to this page if the overview below sufficiently describes the program.
Alternatively, you may be directed to this page if no description matching that specific query is currently available. You can submit a sample of the suspect file to our Response Lab for further analysis via:
A worm is a parasitic program capable of replicating itself by sending copies of itself to new hosts (computers, servers, mobile devices, etc) over a network and other transferable media.
At one time, worms were considered more of a nuisance than a threat, but today it has become increasingly common among malware authors to create malicious, complex worms that can perform malicious activities such as data-stealing or launching Denial of Service (DoS) attacks. Worms may now also be used to deliver other viruses or trojans.
There are numerous worm sub-types, which are defined by the platform or medium in which they propagate:
For more information about worms, see Terminology: Worm.