Threat Descriptons



Category :


Type :


Aliases :

Nimda.B, W32/Nimda@mm, I-Worm.Nimda


Nimda.B is a minor variant of Nimda.A virus that uses PUTA!!.SCR and PUTA!!.EML file names.

F-Secure Anti-Virus detects this variant with updates released on October 9th, 2001 5:28 GMT. At that time F-secure has received no report from affected users.

For more information on Nimda.A please read the description:

[F-Secure Corp.; October 9th, 2001]


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.

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 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.

Technical Details


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