Adware.Win32.MyWebSearch.UYAP

This Adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This Adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Adware drops the following files:

• %User Temp%\ns{random characters}.tmp\nsDialogs.dll
• %User Temp%\ns{random characters}.tmp\System.dll
• %User Temp%\ns{random characters}.tmp\reporting
• %User Temp%\ns{random characters}.tmp\InternetSpeedUtility_msi_bg-copy_1501785690547.bmp
• %User Temp%\ns{random characters}.tmp\cancel_blue_1473354968093.bmp
• %User Temp%\ns{random characters}.tmp\Install_ENG_1435680405923.bmp
• %User Temp%\ns{random characters}.tmp\reporting
• %User Temp%\ns{random characters}.tmp\installerParams
• %User Temp%\ns{random characters}.tmp\reporting
• %User Temp%\ns{random characters}.tmp\secondary_bg.png
• %User Temp%\ns{random characters}.tmp\secondary_accept.png
• %User Temp%\ns{random characters}.tmp\secondary_decline.png
• %User Temp%\ns{random characters}.tmp\reporting
• %User Temp%\ns{random characters}.tmp\InternetSpeedUtility_msi_bg-copy_1501785705775.bmp
• %User Temp%\ns{random characters}.tmp\reporting
• %AppDataLocal%\InternetSpeedUtilityTooltab\TooltabExtension.dll

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Adware adds the following registry keys:

HKEY_CURRENT_USER\Software\InternetSpeedUtility

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetSpeedUtilityTooltab Uninstall Internet Explorer

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetSpeedUtilityTooltab Uninstall Internet Explorer
DisplayName = InternetSpeedUtility Internet Explorer Homepage and New Tab

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetSpeedUtilityTooltab Uninstall Internet Explorer
UninstallString = Rundll32.exe "%AppDataLocal%\InternetSpeedUtilityTooltab\TooltabExtension.dll" U uninstall:InternetSpeedUtility

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetSpeedUtilityTooltab Uninstall Internet Explorer
Publisher = Mindspark Interactive Network, Inc.

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetSpeedUtilityTooltab Uninstall Internet Explorer
HelpLink = http://support.{BLOCKED}ark.com/

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetSpeedUtilityTooltab Uninstall Internet Explorer
URLInfoAbout = http://support.{BLOCKED}ark.com/

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = http://hp.{BLOCKED}.com/internetspeedutility/ttab02/index.html?n=78590A82&p2=^BZD^mni000^TTAB02&ptb=96C0C74D-EF08-4661-BB49-FD686B290EE9&coid=1d3c494eea114868bd7dceae0881293e

HKEY_CURRENT_USER\Software\InternetSpeedUtility
Start Page = http://hp.{BLOCKED}.com/internetspeedutility/ttab02/index.html?n=78590A82&p2=^BZD^mni000^TTAB02&ptb=96C0C74D-EF08-4661-BB49-FD686B290EE9&coid=1d3c494eea114868bd7dceae0881293e

Other Details

This Adware connects to the following possibly malicious URL:

• http://anx.{BLOCKED}ark.com
• https://dp.tb.{BLOCKED}k.com/installerParams.jhtml?coId={value}