Summary
P2P-Worm.Win32.Bacteraloh is a family of P2P-Worms similar to P2P.Worm.Win32.Backterra. Unlike Backterra, Bacteraloh variants may have the additional functionality of dropping Virus.Win32.Sality variants. For a description of Sality, please see our description of Virus.Win32.Sality.Q
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
Distribution
Bacteraloh spreads through file-sharing networks (primarily Emule) by disguising itself as a software crack. To give credibility to the illusion, when executed the worm will display a fake interface and a dialog box with the message "Missing MFClibary.dll", as seen in the samples below:
Installation
The Bateraloh variants that include functionality to install Virus.Win32.Sality will drop a standalone DLL in the folder %system32%. The DLL file is then injected into running processes. If Emule file sharing software is detected, Bacteraloh will create multiple copies of itself in:
- C:\Windows\Temp\Bactera\Â
The copies are labeled using names selected from a long list. The names are mostly in the following format:
- Crack & Keygen all Versions e.g., Spacetanks Crack & Keygen all Versions
- Crack & Keygen and all lower versions e.g., Winamp 5.112 Pro and all lower Versions Crack & Keygen
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