Virus Database

Macro.Word.Zoolog

Description Macro.Word.Zoolog

This macro virus contains one macro AutoOpen and replicates on opening documents. The virus deletes all macros in global macros are (NORMAL.DOT). It writes the line "beep=ZOOlog" to the Windows WIN.INI file and detects itself in the system by reading this string. The virus detects already infected documents by "Document Author" string - "ZOOlog".

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Macro.Word.Dot666

Description Macro.Word.Dot666

This is a polymorphic German specific macro virus. It does not manifest itself in any way. It contains three macros: AutoClose, ExtrasMakro, DateiDokVorlagen.
AutoClose is auto-macro that is executed on closing any file. The virus uses that hook to replicate itself on documents closing. ExtrasMakro and DateiDokVorlagen are macros viewing/editing functions (File/Templates, Tools/Macro) in German MS Word, they are stealth virus routines.
The virus has quite unusual stealth mechanism. On infecting the global macros area it copies to NORMAL.DOT just one AutoClose macro. Two other macros are written to the 666.DOT file that is placed in the Word startup directory. When any of these macros takes control (on entering File/Templates or Tools/Macro) the virus temporary moves its AutoClose from NORMAL.DOT to the 666.DOT file. On leaving these functions the virus restores AutoClose macro in the NORMAL.DOT. Thereby, the virus protects itself from finding (stealth).
On each replication the virus runs its polymorphic mutation engine. It randomly changes names of all virus variables and functions.

Macro.Word.Dracula

Description Macro.Word.Dracula

This is an encrypted Word macro virus. It contains six macros: AutoExec, AutoOpen, FileSave, FilePrint, FileSaveAs, ToolsMacro (stealth). The virus infects the global macros area (NORMAL.DOT) on opening an infected document (AutoOpen) and writes itself to documents that are saved (FileSave, FileSaveAs).
Starting from Jule 4th 1997 while printing a document the virus inserts the string "c Dr. Acula" and sets the password "da". On entering the ToolsMacro menu the virus removes all macros from the current document.

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