Virus Characteristics

XM/Neg is an Excel macro virus. When an infected workbook is opened, the virus first removes several menus from the Excel.

Then it creates an infected workbook, "DOLLAR.XLM", to the Excel startup directory. After that all workbooks that are opened with Excel, will be infected.


Payload

When an infected workbook is closed at 13th day of any month, the virus activates its payload. At this time it appends a small code to the "C:\AUTOEXEC.BAT" file. On the next restart, this code will delete all "*.com", "*.vxd", "*.drv" and "*.dll" files from the Windows directory "C:\WINDOWS". The payload does not work in Windows NT. Next the virus shows a message box with the following text:

Excellent!!! now 1 dollar = 10000 rupiah