Threat Description

Russian New Year

Details

Category: Malware
Platform: W32
Aliases: Russian New Year

Summary


There is no virus by this name. However, there is a well-known security hole in Windows and MS Excel which is known by this name.



Removal


Automatic action

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

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

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


This vulnerability, related to the CALL function of Excel, allows an attacker to send an HTML e-mail or modify a HTML web page so that when accessed, the HTML page will automatically launch Excel and use that to run any program. This allows the attacker to do pretty much anything he wants on the host machine.

This attack is not widespread and no real-world incidents have been reported.

The problem has been partially solved by Microsoft by releasing patch for Excel 97 (this patch will disable the CALL command completely). Excel 95 can't be protected by this time.

Netscape and Internet Explorer can also be secured against this attack by updating to the latest version with latest patches. This does not prevent some attacks through HTML e-mail though.

F-Secure Anti-Virus detects Excel files with embedded harmful CALL commands and will protect the user against this type of attack.

[By Mikko Hypponen, F-Secure]






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