Toolbar:W32/Mostofate
Summary
A browser plug-in which provides additional functionality not included in the standard browser. May introduce security risks not present in the standard browser.
Removal
Based on the settings of your F-Secure security product, it may block the file from running, move it to the quarantine where it cannot spread or cause harm, or ask you to select an action.
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.
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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.
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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
This is the family description for the Toolbar:W32/Mostofate family of adware programs.
The Mostofate program is a Browser Helper Object (BHO), a type of browser plug-in 'added on' to web browser programs to provide additional functionality. Like many BHOs, Mostofate is a Microsoft Internet Explorer (IE) toolbar that offers limited search functionality and some utility functions.
Some variants and components in this family are also detected as Adware:W32/Mostofate.
Installation
The toolbar is manually installed from an installer component that may be downloaded from the Internet.. The program is by default installed at:
- C:\Program Files\FindFM Toolbar.
The installer allows the user to change the installation folder.
The following files are created by the installation:
- C:\Program Files\FindFM Toolbar\toolbar.dll (toolbar component)
- C:\Program FIles\FindFM Toolbar\1a.bmp
- C:\Program FIles\FindFM Toolbar\icons.bmp
- C:\Program FIles\FindFM Toolbar\toolbar.crc
- C:\Program FIles\FindFM Toolbar\error.html
- C:\Program FIles\FindFM Toolbar\inst.bat
- C:\Program FIles\FindFM Toolbar\toolbar.inf
- C:\Program FIles\FindFM Toolbar\newversion.txt
- C:\Program FIles\FindFM Toolbar\version.txt
- C:\Program FIles\FindFM Toolbar\basis.xml
Once installed, the program registers the toolbar in Internet Explorer. The toolbar can be uninstalled from the browser, but its files and registry entries have to be manually removed.
Activity
When first run, Mostofate attempts to update itself from the Internet. It will also set the default homepage to:
- https://www.find.fm/
This site has the appearance of a search engine page, but most searches will return advertisements and links to porn sites. For example, typing the search terms 'adult education' in the search field resulted in the following search results being returned:
The toolbar allows users to clear the browser's search history, visited sites, etc. There is a risk that searches will be logged and used to deliver further targeted advertising.
The latest available installation package is also available as the following on the search engine page(s):
- https://www.peakclick.com/toolbar/1/toolbar.exe
Registry
The malware creates numerous registry keys, notably:
- HKCU\software\XBT04482\Toolbar\
- HKCU\software\microsoft\internet explorer\toolbar\webbrowser\
- HKCU\software\XBTB04482\
Note
Mostofate was created using software from Softomate, a development tool supplier. This is nota detection of Softomate's development tools, but rather is a detection of a Data Mining Toolbar created using Softomate's software.