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
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.
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