Home Malware Programs Adware Adware.WebAdSystem

Adware.WebAdSystem

Posted: June 13, 2014

Threat Metric

Threat Level: 2/10
Infected PCs: 41,034
First Seen: June 13, 2014
Last Seen: December 4, 2024
OS(es) Affected: Windows


WebAdSystem is an adware program created by KalityWeb. WebAdSystem may cause or allow your system to have several pop-up ads displayed where many of them attempt to advertise or offer deals on items over shopping websites. WebAdSystem may also cause your web browser to perform slowly due to the several ad pop-ups that it generates. Most times WebAdSystem comes from the installation of random freeware programs or bundled software applications downloaded from the internet. Removal of the WebAdSystem ads may require finding all components related to WebAdSystem and uninstalling each of them. Automatically eliminating WebAdSystem may be done through using an updated antispyware tool capable of removing adware from a Windows PC.

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:



C:\Program Files (x86)\WebAdSystem\WebAdSystem.exe File name: WebAdSystem.exe
Size: 822.64 KB (822640 bytes)
MD5: efd1839f21cebb26d4a815acda85e3a1
Detection count: 9,556
File type: Executable File
Mime Type: unknown/exe
Path: C:\Program Files (x86)\WebAdSystem\WebAdSystem.exe
Group: Malware file
Last Updated: December 4, 2024
C:\Program Files (x86)\WebAdSystem\WebAdSystemHttpProxy.exe File name: WebAdSystemHttpProxy.exe
Size: 239.98 KB (239984 bytes)
MD5: 9dcda6f19811952ec42fdcb79ddb48aa
Detection count: 6,092
File type: Executable File
Mime Type: unknown/exe
Path: C:\Program Files (x86)\WebAdSystem\WebAdSystemHttpProxy.exe
Group: Malware file
Last Updated: May 22, 2023
C:\Program Files (x86)\WebAdSystem\BrowserExtensions\internetexplorer\WebAdSystemBho.dll File name: WebAdSystemBho.dll
Size: 83.31 KB (83312 bytes)
MD5: af35bae1042cddf015542d0953dc8b8b
Detection count: 66
File type: Dynamic link library
Mime Type: unknown/dll
Path: C:\Program Files (x86)\WebAdSystem\BrowserExtensions\internetexplorer\WebAdSystemBho.dll
Group: Malware file
Last Updated: December 4, 2024
%TEMP%\nsn6AE5.tmp\WebAdSystem_setup.exe File name: WebAdSystem_setup.exe
Size: 1.41 MB (1418328 bytes)
MD5: 7e6d9169e6ce0c89681bb371497dca03
Detection count: 41
File type: Executable File
Mime Type: unknown/exe
Path: %TEMP%\nsn6AE5.tmp
Group: Malware file
Last Updated: June 13, 2014

More files

Registry Modifications

The following newly produced Registry Values are:

CLSID{4030C54B-D223-4798-B665-68767B0E843F}{D9EDA72A-94DB-44CF-91C5-CBE30BB3F610}{EC8FCB46-9F27-476E-B26A-93989316D2FB}File name without pathWebAdSystem.lnkRegexp file mask%TEMP%\WebAdSystem_[RANDOM CHARACTERS].logHKEY..\..\..\..{RegistryKeys}SOFTWARE\Classes\AppID\WebAdSystemBho.DLLSOFTWARE\Classes\AppID\{89637713-7F69-46BD-BF01-EF4F172D3DCE}SOFTWARE\Classes\Installer\Dependencies\{AF59773E-3245-46A3-B418-DD84AB6C3C50}SOFTWARE\Classes\Installer\Dependencies\{d8d2dd71-6eef-437b-9507-7400e210074a}SOFTWARE\Classes\Installer\Features\E37795FA54233A644B81DD48BAC6C305SOFTWARE\Classes\Installer\Products\E37795FA54233A644B81DD48BAC6C305SOFTWARE\Classes\Installer\UpgradeCodes\A21967E6B9E81824BBDA78ED6535B687SOFTWARE\Classes\WebAdSystemBho.WebAdSystemBhoObjSOFTWARE\Classes\WebAdSystemBho.WebAdSystemBhoObj.1SOFTWARE\Classes\Wow6432Node\AppID\WebAdSystemBho.DLLSoftware\KalityWeb\WebAdSystemSoftware\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\WebAdSystem.exeSOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{EC8FCB46-9F27-476E-B26A-93989316D2FB}Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{EC8FCB46-9F27-476E-B26A-93989316D2FB}Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{EC8FCB46-9F27-476E-B26A-93989316D2FB}SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WebAdSystemSOFTWARE\Mozilla\Firefox\Extensions\firefoxextension@webadsystem.comSOFTWARE\Wow6432Node\Classes\AppID\WebAdSystemBho.DLLSOFTWARE\Wow6432Node\Classes\AppID\{89637713-7F69-46BD-BF01-EF4F172D3DCE}SOFTWARE\Wow6432Node\KalityWeb\WebAdSystemSOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{EC8FCB46-9F27-476E-B26A-93989316D2FB}SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\WebAdSystemSOFTWARE\Wow6432Node\Mozilla\Firefox\Extensions\firefoxextension@webadsystem.comHKEY_LOCAL_MACHINE\Software\[APPLICATION]\Microsoft\Windows\CurrentVersion\Uninstall..{Uninstaller}{7C853B1C-9B65-4669-823B-DCD4B01595D5}{84a0dbbf-77ce-4a6d-a963-abb6146a7efc}{AF59773E-3245-46A3-B418-DD84AB6C3C50}{d8d2dd71-6eef-437b-9507-7400e210074a}

Additional Information

The following directories were created:
%ALLUSERSPROFILE%\Package Cache\{d8d2dd71-6eef-437b-9507-7400e210074a}%LOCALAPPDATA%\KalityWeb\WebAdSystem%PROGRAMFILES%\WebAdSystem%PROGRAMFILES(x86)%\WebAdSystem
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