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
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 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.
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:
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:
The copies are labeled using names selected from a long list. The names are mostly in the following format: