Threat Encyclopedia

Selected viruses, spyware, and other threats: sorted alphabetically

Win32 Worm Aliz.A

This is a worm written in assembler, spreading by means of electronic mail. The worm is not dependent on the installed mail client because it contains its own service for sending its copies to the default SMTP server of the given computer. The worm relies on the untreated error at processing of the MIME header which may cause the attachments of e-mail messages to be executed upon displaying the view or at opening. Description of that error as well as way to remove it you will find on www.microsoft.com/technet/security/bulletin/MS01-020.asp. With presence of that error the worm will be run and its copy will be sent to all addresses found in the Windows address book. Subject of the message being sent out consists of five strings which are chosen independently on each other from several options. The attachment of the message is formed by the file whatever.exe.

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