Threat Description



Aliases: Bropia.J, IM-Worm.Win32.Bropia.j
Category: Malware
Platform: W32


Bropia.J is a minor variant of Bropia.G worm. Like the previous variants, it uses MSN messenger for spreading. It also drops a variant of Rbot on the infected system.


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 for files

win32s.exe  winis.exe  svchosts.exe  iexplore.exe   

This check is made to prevent the worm for installing it again on infected system.If the files are not found, it drops file "exe.exe" and executes it. This file is a variant of Rbot. The bot can be used as a backdoor, collecting system information, logging keystrokes, relaying spam and for various other purposes.Brobia.J also drops a file "pic.jpg" and opens it. On default installation of Windows, the program associated with jpg-extension is usually Internet Explorer. The picture presents a woman in light clothing.

MSN spreading

The worm attempts to send one of the following messages to MSN Messenger contacts:

LOOK!   :-O  paris hilton got hacked!!  :D  Huge Turd hahaah!   :P  nice!  :P  ownage!  :D   

Where <URL to worm> is a http-link to worm's file. Possible file names in the URLs are

scary.pif  paris-hilton.pif  massive-turd.pif  sexy-pitch.pif  w00t!.pif  FUNNY-SHIT!.pif   

The links are static addresses. At the time of this writing, the files has been removed from the servers.


F-Secure Anti-Virus detects Brobia.J with the following update:
Database: 2005-02-22_01

Technical Details:Jarkko Turkulainen, Feb 22rd, 2005


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