Threat description




Bropia.A is a worm that uses MSN messenger for spreading by sending itself as "Drunk_lol.pif", "Webcam_004.pif", "sexy_bedroom.pif", "naked_party.pif" or "love_me.pif". It also drops a variant of Rbot on the infected computer.


Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

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

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

When run, the worm checks files

adaware.exe  VB6.EXE  lexplore.exe  Win32.exe  

If these files are not found, it drops file


and executes it. This file is a variant of Rbot. When "oms.exe" is run, it copies itself as "lexplore.exe" and adds the following registry keys:

[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]  "lexplore" = "lexplore"  [HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices]  "lexplore" = "lexplore"  

This ensures that it will be executed at next system startup. The bot can be used as a backdoor, collecting system information, logging keystrokes, relaying spam and for various other purposes.Brobia.A can also disable mouse right button and manipulate Windows mixer volume settings.

MSN spreading

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

Drunk_lol.pif  Webcam_004.pif  sexy_bedroom.pif  naked_party.pif  love_me.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.A with the following update:

Database: 2005-01-20_01

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