Home Malware Programs Adware WebOptimum Ads

WebOptimum Ads

Posted: November 16, 2015

Threat Metric

Ranking: 13,385
Threat Level: 2/10
Infected PCs: 11,853
First Seen: November 16, 2015
Last Seen: February 12, 2025
OS(es) Affected: Windows

If you can find some ads labeled as 'Ad by WebOut' during your surfing sessions, then there is adware on your PC. The full name of this suspicious ad-oriented plugin is WebOptimum. This annoying extension doesn't possess an official product page. The most popular platforms for Web add-ons also do not host it. WebOptimum may not rely on direct downloads, but travel across the cyberspace concealed in the installers of third-party freeware. This fact means that you may allow it to enter easily without knowing if you perform the setup process through the 'Quick' menu. It usually doesn't show detailed data about additional elements and their influence on the system, so you should instead select the 'Advanced' guide. WebOptimum may affect all of the available browsers, including Google Chrome, Mozilla Firefox and Internet Explorer.

The adware may monitor your online patterns carefully: it may have access to the list of visited pages and search history. This information may allow WebOptimum to display user-relevant ads that you may notice in different formats. Typically, PC users who have this suspicious extension complain about large quantities of pop-ups, banners and interstitial ads. Some sporadic automatic redirections also may be possible. The adware may change some of the browsers' settings automatically – it may replace the preset homepage and default search engine. It is not advisedto visit the partner sites that WebOptimum promotes for security reasons. While some of the advertised pages may be safe, others may host threatening software. Even if you ignore the commercial materials, the presence of heavy multimedia elements may slow down the operating speed of your Web clients or even cause freezes. Since the manual removal of the adware may be problematic, it is better to use dedicated security software to delete WebOptimum.

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:



%PROGRAMFILES%\Windriver\Scheduler.Service.exe File name: Scheduler.Service.exe
Size: 8.19 KB (8192 bytes)
MD5: e59e9134db705a32c9049521700c44d4
Detection count: 211
File type: Executable File
Mime Type: unknown/exe
Path: %PROGRAMFILES%\Windriver
Group: Malware file
Last Updated: June 7, 2017
weboptimumsetup.exe File name: weboptimumsetup.exe
Size: 2.78 MB (2783718 bytes)
MD5: 71d5e880cb14abd33cf3fb9a149d23a7
Detection count: 99
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: January 8, 2020
IEWebOptimumPlugin.dll File name: IEWebOptimumPlugin.dll
Size: 16.89 KB (16896 bytes)
MD5: 69e29f3ad1cc2c7410f397e07f2d3892
Detection count: 7
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
Last Updated: January 23, 2020

More files

Registry Modifications

The following newly produced Registry Values are:

CLSID{314CC13E-2027-44CA-838B-546591A01FDA}Regexp file mask%homedrive%\bin\IEPDFDEFAULTPlugin.dll%homedrive%\bin\IEWebOptimumPlugin.dllHKEY..\..\..\..{RegistryKeys}SOFTWARE\Classes\IePDFDEFAULTPlugin.BHOSOFTWARE\Classes\IeWebtoptimumPlugin.BHOSoftware\Microsoft\Installer\Features\3A88A6A819B17D14DB97AEF09A87A9C0Software\Microsoft\Installer\Products\3A88A6A819B17D14DB97AEF09A87A9C0SOFTWARE\Microsoft\Installer\UpgradeCodes\EFA04FB84BC66B44EBEF97B9527B7275Software\Microsoft\Internet Explorer\Approved Extensions\{314CC13E-2027-44CA-838B-546591A01FDA}SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{314CC13E-2027-44CA-838B-546591A01FDA}Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{314CC13E-2027-44CA-838B-546591A01FDA}Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{314CC13E-2027-44CA-838B-546591A01FDA}SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{314CC13E-2027-44CA-838B-546591A01FDA}HKEY_LOCAL_MACHINE\Software\[APPLICATION]\Microsoft\Windows\CurrentVersion\Uninstall..{Uninstaller}PDFDEFAULTWebOptimum{0187837F-FA61-437D-9647-EE1E86233276}{0FFAB04C-C934-4880-83E7-D185F2AA636B}{1A7A2E40-C5BF-4F12-AC08-1EBA56D0109C}{8A6A88A3-1B91-41D7-BD79-EA0FA9789A0C}{C2705BBD-00A4-4056-86C0-ACBAD87B5EDE}{CBB7A1EB-D3C4-45A9-A5C9-EFB40A22BF7E}

Additional Information

The following directories were created:
%PROGRAMFILES%\PDFDEFAULT%PROGRAMFILES%\Sysndriver%PROGRAMFILES%\Videodriver%PROGRAMFILES%\WebOptimum%PROGRAMFILES%\Windriver%PROGRAMFILES(x86)%\PDFDEFAULT%PROGRAMFILES(x86)%\Sysdriver%PROGRAMFILES(x86)%\Videodriver%PROGRAMFILES(x86)%\WebOptimum%PROGRAMFILES(x86)%\Windriver
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