Threat Description

Yawn

Details

Aliases: Yawn
Category: Malware
Type: Virus
Platform: W32

Summary



Yawn is an Excel macro virus.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details



Yawn.A virus consists of 2 modules. The class module 'Class 1' contains a small code that opens Personal.xls from Excel startup directory.

The other module has a random name. This part of the code disables the built-in macro virus protection when a workbook is opened. If the virus was not run from PERSONAL.XLS, it creates this file in Excel Startup directory generating a random module name.

To replicate the virus also export its code in a file 't' in Excel Startup foder.

The virus tries to delete several menus. As an infection marker Yawn.A uses the following commented text in its code:

'taitai


Variant:Yawn.A

Description:

Yawn.A virus consists of 2 modules. The class module 'Class 1' contains a small code that opens Personal.xls from Excel startup directory. The other module has a random name. This part of the code disables the built-in macro virus protection when a workbook is opened. If the virus was not run from PERSONAL.XLS, it creates this file in Excel Startup directory generating a random module name. To replicates the virus also export its code in a file 't' in Excel Startup foder. The virus tries to delete several menus. As an infection marker Yawn.A uses the following commented text in its code: 'taitai






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