This mass-mailing worm, written in Visual Basic 6, uses Microsoft Outlook to send itself to all addresses in the Outlook Address book and addresses on the MSN Messenger contact list. It arrives in an email containing the following information:
The attachment is a UPX packed PE file. When executed on the local machine, the following message box is displayed whilst the worm copies itself to the System folder, and uses Outlook to propagate itself to all address found in the Outlook Address book and addresses on the MSN Messenger contact list:
The following Registry key is added to ensure the worm is executed at subsequent system startup:
Upon restarting the machine, the worm does not propagate again, and the above message box is not displayed.
If the worm is run when the minutes of the hour is greater than 50, the worm displays a message box and attempts to delete all files on the C: drive and to format drives C, E, F, G, H, and I. (This payload does not work on WinNT/2K/XP systems)