VBS/Pica is a worm written in VBScript.
Disinfection & Removal
When executed, the worm copies itself to the Windows System directory as "Ds9.vbs". Then it modifies the registry so that it will be executed each time the system is restarted.
After that the worm will send itself to every recipient in every addressbook using Outlook.
The message that the worm sends looks like this:
Subject: Hi check This... Body: Hello..your Game is Over..By Q from Lee Attachment: Ds9.vbs
After mass mailing, the worm marks the registry so that the mass mailing will not be done again.
Finally, the worm checks if the "mirc.ini" file exists in the mIRC chat client installation directory, and if so, it replaces the "script.ini" with its own. After that the worm will be sent to every user that joins the channel where the infected user is.
The worm contains the following commented line in the top of its code:
'Worm Created by Ds9 --> Lee
Technical Details: Katrin Tocheva and Sami Rautiainen, F-Secure