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Aliases :

Trojan:W32/Chinky, Worm.Win32.VBNA, Trojan.VB.Chinky, W32/VBNA.worm (McAfee), Worm:Win32/Vobfus (Microsoft), W32.Changeup (Symantec)


Trojan:W32/Chinky (also known as Worm.Win32.VBNA) refers to a family of trojans that may download additional malware onto the affected computer.


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

Variants in this family are server-side polymorphic, so that each infection caused by a variant is unique.

Variants in this family are also notable for having a worm-like functionality, in that they are capable of infecting new victims via infected removable media, such as USB thumb drives.