Wikedir is an Internet worm that spreads by e-mail and through file sharing networks. Once executed, the parasite secretly installs itself to the system and runs a spreading routine. It uses own mail engine to send e-mails with attached Zip archives containing infected files to addresses it gathers from the Windows address book and local text, web and program files. Wikedir also creates numerous copies of itself in shared folders of Kazaa, eDonkey2000, Limewire, Morpheus and iMesh peer-to-peer applications, so that other users can access them online. Then the worm runs a payload. It installs a backdoor providing the attacker with unauthorized remote access to the compromised computer. Wikedir runs on every Windows startup.