Threat description


Category: Malware
Type: Virus
Platform: W97M
Aliases: Onex


W97M/Onex is a simple Word macro virus.


Automatic action

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


More information on scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details


W97M/Onex.A is a simple Word macro virus, that infects the global template when an infected document is opened. After that all opened documents become infected. Beside replication the virus disables the macro virus protection.


W97M/Onex.E contains a payload that activates based on a random number. In a chance of 1:150 the virus attempts to delete "c:\winnt\system32\ntoskrnl.exe" when an infected document is opened or a document is opened in an infected system. Otherwise it functions like the original W97M/Onex.A.

Technical Details:Sami Rautiainen, F-Secure; August 2001


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