Shankar's Virus

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Shankar's Virus
Type Computer virus
Isolation June 1999

Shankar's Virus (also known as W97M.Marker.o) is a polymorphic computer virus that infects Microsoft Word documents and templates. It was discovered on June 3, 1999.


The virus hooks the Word event handler to close documents in order to run its code.

This virus infects documents and templates when a document is opened. It makes the following modifications to the infected documents: [1]

Title: Are You surprised ?
Subject: Birthday 
Author: LdSK
Category: You Are Infected
Keywords: Birthday
Comments: Shankar's Birthday falls on 25th July. Don't Forget to wish him

Also, when opening or closing a Word document, a dialogue box pops up displaying the string text "Did you wish Shankar on his birthday?"

Shankar's virus is also able to effect a computer's time, being able to speed up or reverse time to restore itself (in a way similar to the system restore function) or create a copy of itself to remain inactive until a future time if it should be removed via an antivirus program. It is noted though that these actions visibly weaken its functions as Microsoft Word may stop malfunctioning after the virus manipulates the computer's time.

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