Win32/Lefgroo
Posted: January 9, 2013
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
Threat Level: | 5/10 |
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Infected PCs: | 91 |
First Seen: | January 9, 2013 |
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OS(es) Affected: | Windows |
Win32/Lefgroo is a worm that copies itself to removable and network drives, and displays messages. Once installed on the corrupted PC, Win32/Lefgroo makes system changes by dropping potentially malicious files and modifying the Windows Registry. Win32/Lefgroo also creates a registry entry to assure that it loads automatically each time you start Windows. Win32/Lefgroo may also open websites in a full-screen browser window. Win32/Lefgroo may modify the registry entries in an attempt to help remain on the computer system, and help to deliver its payload. Win32/Lefgroo removes the Folder Options item from all Explorer menus and the Control Panel and modifies Internet Explorer settings by modifying the Windows Registry. Win32/Lefgroo disables the system tool Task Manager by making modifications to the Windows Registry.
Technical Details
File System Modifications
Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.
The following files were created in the system:[Drive]:\musica.exe
File name: [Drive]:\musica.exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%windir%\profile\services.exe
File name: %windir%\profile\services.exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%windir%\profile\susoft.exe
File name: %windir%\profile\susoft.exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
Registry Modifications
HKEY..\..\{Value}HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main "FullScreen" = "yes"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer "NoFolderOptions" = "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System "DisableRegistryTools" = "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "HTML" = "%windir%\profile\services.exe"
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