Summary
Bropia.G is a new variant of Bropia worm. Like the previous variants, it uses MSN messenger for spreading. It also drops a variant of Rbot on the infected system.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
When run, the worm checks for file "nvsc32.exe". This check is made to prevent the worm for installing it again on infected system.If "nvsc32.exe" is not found, it drops file "exe.exe" and executes it. This file is a variant of Rbot. When "exe.exe" is run, it copies itself as "nvsc32.exe" in the Windows system directory and installs itself on system. It adds the following registry keys to ensure it will be run on the next system startup:
[HKLM\System\CurrentControlSet\Services] [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] [HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce] [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] [HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce] "NvCplScan" = "%SystemDir%\nvsc32.exe"
The bot can be used as a backdoor, collecting system information, logging keystrokes, relaying spam and for various other purposes.Brobia.G also drops a file "pic.jpg" and opens it. On default installation of Windows, the program associated with jpg-extension is usually Internet Explorer. This file presents a woman in handcuffs.
MSN spreading
The worm attempts to send one of the following messages to MSN Messenger contacts:
LOOK! :-O wtf.... :D OMFG! :P LMFAO! :P
Where <URL to worm> is a http-link to worm's file. The link is static address. At the time of this writing, the file has been removed from the server.
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