When searching our Virus Descriptions database for a specific program (e.g., Net-Worm:W32/Example.A
), you may be directed to this page if the overview below sufficiently describes the program.
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A net-worm is a type of worm
that finds new host machines to infect by using network shares -
a media (such as a hard drive or server) that can be accessed by multiple computers on a local area network (LAN), such as a company intranet. The net-worm will usually infect the share in order to subsequently infect every computer that accesses the share.
In many cases, corporate computers and servers have a few open shares, making these networks particularly vulnerable and facilitating a net-worm's rapid spread through the network. In more sophisticated cases, net-worms may even contain a list of generic passwords to use in attacking password-protected shares.
Once transferred to another host machine, some net-worms copy themselves to startup folders of different users on remote computers. In this case they can start every time a user is logged on to the machine.
A net-worm may also include a malicious payload, such as dropping keylogger program on the infected computer, or attempting to connect it to a remote server.
For more information, see Encyclopedia: Net-Worm