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XF/Sic is a simple Excel formula virus. It spreads when Excel documents are opened.

The virus contains these texts:

Classic.Poppy by VicodinES
        With Lord Natas
        An Excel Formula Macro Virus (XF.Classic)
        Hydrocodone/APAP 10-650 For Your Computer
        (C) The Narkotic Network 1998

Disinfection & Removal

Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.

Technical Details

The virus activates at 06:30 and 18:30, if an infected sheet is open. On 06:30, it displays this text in the status row of Excel:

VicodinES and Lord Natas greet you a good morning!

At the same time, the title of Excel is changed from "Microsoft Excel" to "XF.Classic.Poppy".

At 18:30, it displays two dialog boxes, with these texts:

XF.Classic.Poppy by VicodinES
        (c) 1998 The Narkotic Network

The virus assign it's macro to the user sheets.This can cause sometimes an error message when Excel open/close already disinfected files.

Technical Details: Mikko Hypponen & Katrin Tocheva

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