Threat Description



Aliases: Bropia.C, IM-Worm.Win32.VB.c
Category: Malware
Type: Worm
Platform: W32


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.


Automatic action

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


Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for further assistance.

Technical Details

When run, the worm checks files

  winexec32.exe  adaware32.exe  VB6.EXE  iexplore.exe   

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:

LOL.scr  Webcam.pif  hahahaha.pif  me_2005.pif  sister.pif     

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.


F-Secure Anti-Virus detects Brobia.C with the following update:
Database: 2005-01-26_01

Technical Details:Jarkko Turkulainen, Jan 26th, 2005


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