Adware.Win32.MyWebSearch.UYAP


 ALIASES:

HEUR:WebToolbar.Win32.Agent.gen (Kaspersky); Adware/Agent, Adware/Agent (Fortinet)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

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}

  SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

2.165.00

SSAPI PATTERN Date:

17 Apr 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove Adware.Win32.MyWebSearch.UYAP by using its own Uninstall option

[ Learn More ]
To uninstall the grayware process

Step 3

Scan your computer with your Trend Micro product to delete files detected as Adware.Win32.MyWebSearch.UYAP. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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