Threat Description





W97M/Leonor is a simple Word macro virus. It consists of one module "AutoOpen" and infects when open documents.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.


You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.

Technical Details

Depending on a random number, every Monday or Saturday W97M/Leonor virus creates 100 text files in the "C:\WINDOWS\ESCRITORIO" directory. These files contain the following string:

I love Leonor forever

The names of the files range from "1.txt" to "100.txt".

The virus also contains the comment:

Leonor macro (v1.1) made by uhjov


This variant is similar to W97/Leonor.A. The files it creates when payload activates contains the following text:

Recuerdo de Leonor
	 Una noche de verano
  -estaba abierto el balcn
  y la puerta de mi casa-
  la muerte en mi casa entr.
  Se fue acercando a su lecho
  -ni siquiera me mir-,
  con unos dedos muy finos
  algo muy tenue se rompi.
  Silenciosa y sin mirarme,
  la muerte otra vez pas
  delante de m. Qu has hecho?
  La muerte no respondi.
  Mi nia qued tranquila,
  dolido mi corazn.
  Ay, lo que la muerte ha roto
  era un hilo entre los dos!
		A. Machado

The comment in the virus code is also different:

Leonor macro (v1.2) made by Uhjov


W97M/Leonor.C is slightly modified variant from W97M/Leonor.A.

Technical Details: Katrin Tocheva and Sami Rautiainen, F-Secure


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