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Bropia.A

Classification

Category: Malware

Type: Worm

Aliases: Bropia.A, IM-Worm.Win32.VB.a

Summary


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.

Removal


Automatic action

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

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About the product

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Submit a sample

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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

oms.exe

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.