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.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
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.
The worm attempts to send one of the following messages to MSN Messenger contacts:
LOOK! <URL to worm> :-O paris hilton got hacked!! <URL to worm> :D Huge Turd hahaah! <URL to worm> :P nice! <URL to worm> :P ownage! <URL to worm> :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:
Technical Details: Jarkko Turkulainen, Feb 22rd, 2005