Threat Descriptons



Category :


Type :


Aliases :

Bropia.C, IM-Worm.Win32.VB.c


Bropia.C is a minor variant of Bropia.A. It uses MSN messenger for spreading by sending itself as "LOL.scr", "Webcam.pif", "hahahaha.pif", "me_2005.pif" or "sister.pif". It also drops a variant of Rbot on the infected 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

When run, the worm checks files


If these files are not found, it drops file "cz.exe" and executes it. This file is a variant of Rbot which is detected generically by FSAV.Brobia.C can also disable mouse right button.

MSN spreading

The worm copies itself in C-directory using one of the following filenames:



Then it attempts to send this file using MSN messenger to all active MSN contacts. The MSN messenger window has to be open on the infected computer's desktop for this to be successful.

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