The following instructions have been created to help you to get rid of "MExplorer" manually.
Use this guide at your own risk; software should usually be better suited to remove malware, since it is able to look deeper.

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Threat Details:

Categories:
  • trojan

Description:
The MExplorer trojan horse pretends to be a harmless file. It runs in background and uses rootkit functionality to hide itself from the Explorer. It hooks a services32.dll to various processes like the Explorer and Spybot S&D. Symptoms for a MExplorer infection are access violation error messages while scanning with Spybot S&D. Removal may require manual steps, please contact Team Spybot S&D via email or forums. MExplorer adds an iexplore.dll as a browser helper object to the Internet Explorer and opens the browser in background. The trojan horse also connects to malicious websites in background and transmits information about the user's computer.
Supposed Functionality:
supposed to be a legit or harmless file
Removal Instructions:

Files:

Please use Windows Explorer or another file manager of your choice to locate and delete these files.
  • The file at "<$WINDIR>\iexplore.dll".
  • The file at "<$SYSDIR>\iexplore.dll".
  • A file with an unknown location named "iexplore.dll".
  • The file at "<$WINDIR>\frat.exe".
  • A file with an unknown location named "frat.exe".
  • A file with an unknown location named "services.dll".
  • The file at "<$SYSDIR>\services.dll".
  • The file at "<$WINDIR>\services.dll".
  • A file with an unknown location named "system32.dll".
  • The file at "<$SYSDIR>\system32.dll".
  • The file at "<$WINDIR>\system32.dll".
Make sure you set your file manager to display hidden and system files. If MExplorer uses rootkit technologies, use our RootAlyzer or our Total Commander anti-rootkit plugins.
You will have to use a global search for files without a name specified. Be extra careful, because just the name might not be enough to identify files!

Important: There are more files that cannot be safely described in simple words. Please use Spybot-S&D to remove them.

Registry:

You can use regedit.exe (included in Windows) to locate and delete these registry entries.
  • Delete the registry key "VideoCodecBBC" at "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\".
If MExplorer uses rootkit technologies, use our RegAlyzer, RootAlyzer or our Total Commander anti-rootkit plugins.

Final Words:

If neither Spybot-S&D nor self help did resolve the issue or you would prefer one on one help,
  1. Please read these instructions before requesting assistance,
  2. Then start your own thread in the Malware Removal Forum where a volunteer analyst will advise you as soon as available.