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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Lop

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Lop
Technical name:Adware/Lop
Threat level:Low
Alias:Obfuscated,Swizzor, Trojan-Downloader.Win32.Agent.msi,, mp3search, C2 Media, Swizzor
Type:Adware
Effects:  

It adds a toolbar to Internet Explorer and displays pop-up advertisements.

Affected platforms:

Windows 2003/XP/2000/NT

First detected on:Nov. 26, 2003
Detection updated on:May 25, 2010
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Lop is an adware type program, which offers users an application in exchange for viewing a series of advertisements.

Lop only affects Windows 2003/XP/2000/NT operating systems. It is an executable file that installs a DLL (Dynamic Link Library), which registers itsef as a BHO (Browser Helper Object) in the browser Internet Explorer.

Most versions of Lop add a toolbar to the browser Internet Explorer. This toolbar will allow users to carry out Internet searches, but it also displays a large number of pop-up advertisements.

Additionally, Lop changes the Internet Explorer homepage, in order to display the homepage of the company that created Lop, which several companies use in order to advertise their products. It also creates shortcuts to different website, both in the Windows Desktop and in the directory Favorites.

Lop causes an error and closes the applicaction explorer.exe if the compressor WinZip is installed and the user attempts to access Lop contextual menu.

Visible Symptoms 

    

Lop is easy to recognize, as it cahnges the browser Internet Explorer homepage to the one below:

In addition, most versions of Lop add a toolbar to Internet Explorer.