Wrench

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Classification

Category:

Malware

Type:

Virus

Platform:

W97M

Aliases:

Wrench

Summary

W97M/Wrench is a Word 97 macro virus.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details


Variant:Wrench.A

W97M/Wrench.A infects the global template when an infected document is opened or closed. During infection, the virus creates two temporary files, "c:\Bench" and "c:\BenchFrm". After infection, the virus deletes all "Bench*" files from the root of the C: drive - including the temporary files created by the virus.

The virus hooks "Help/About" menu. When an user selects this menu, a picture is displayed:

Then it displays a message box with a text:

I'm Psycho Sushi!!!

W97M/Wrench.A also hooks "Tools/Macros/Visual Basic Editor" menu, displaying a message box with the following text:

This program has performed an illegal operation and will shut down.

After that the virus causes Word to quit.


Variant:Wrench.B

This variant is slightly modified from W97M/Wrench.A. This variant does not hook "Tools/Macros/Visual Basic Editor" nor it does not display additional message box after the picture when "Help/About" is selected.


Variant:Wrench.C

W97M/Wrench.C is a slightly modified variant of W97M/Wrench.A. The only difference between these two is that this variant does not display a message box after the picture when "Help/About" is selected.