Author: Jay Garcia   
 

Win32:UnwantedSig [PUP] (Avast); PUA:Win32/MyWebSearch (Microsoft)

 PLATFORM:

Windows

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL::
 DISTRIBUTION POTENTIAL::
 REPORTED INFECTION:
 INFORMATION EXPOSURE:
Low
Medium
High
Critical

  • Threat Type:
    Potentially Unwanted Application

  • Destructiveness:
    No

  • Encrypted:
     

  • In the wild::
    Yes

  OVERVIEW


  TECHNICAL DETAILS

File size: 385,552 bytes
File type: EXE
INITIAL SAMPLES RECEIVED DATE: 14 de марта de 2019

Instalación

Infiltra los archivos siguientes:

  • %User Temp%\nsh786A.tmp\nsDialogs.dll
  • %User Temp%\nsh786A.tmp\System.dll
  • %User Temp%\nsh786A.tmp\MDC_msi_bg-copy_1501792562604.bmp
  • %User Temp%\nsh786A.tmp\cancel_blue_1473358017200.bmp
  • %User Temp%\nsh786A.tmp\Install_ENG_1436200260055.bmp
  • %User Temp%\nsh786A.tmp\reporting
  • %User Temp%\nsh786A.tmp\installerParams
  • %User Temp%\CabBDF3.tmp
  • %User Temp%\TarBDF4.tmp
  • %User Temp%\nsh786A.tmp\secondary_bg.png
  • %User Temp%\nsh786A.tmp\secondary_accept.png
  • %User Temp%\nsh786A.tmp\secondary_decline.png
  • %User Temp%\nsh786A.tmp\MDC_msi_bg-copy_1501792573865.bmp
  • %AppDataLocal%\MyDigitalCalendarTooltab\TooltabExtension.dll

(Nota: %User Temp% es la carpeta Temp del usuario activo, que en el caso de Windows 2000, XP y Server 2003 suele estar en C:\Documents and Settings\{nombre de usuario}\Local Settings\Temp).

)

Otras modificaciones del sistema

Agrega las siguientes entradas de registro como parte de la rutina de instalación:

HKEY_CURRENT_USER\Software\MyDigitalCalendar

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\TabbedBrowsing

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

Agrega las siguientes entradas de registro:

HKEY_CURRENT_USER\Software\MyDigitalCalendar
Start Page = http://hp.{BLOCKED}y.com/mydigitalcalendar/ttab02/index.html?n=7857F972&p2=^COP^mni000^TTAB02&ptb=201AB8B3-57F1-4E5E-AE7E-66F837C64A4E&coid=063a79206fb5455b9e4c12a0c489f767

HKEY_CURRENT_USER\Software\MyDigitalCalendar
UnInstallSurveyUrl = http://@{downloadDomain}.dl.{BLOCKED}y.com/uninstall.jhtml?surveyUrl=http%3A%2F%2Fwww.research.net%2Fr%2FHYSCVNM%3Fc%3D201AB8B3-57F1-4E5E-AE7E-66F837C64A4E%26ptb%3D^COP^mni000^TTAB02

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\TabbedBrowsing
NewTabPageShow = 1

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

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

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
MyDigitalCalendarTooltab Uninstall Internet Explorer
DisplayName = MyDigitalCalendar Internet Explorer Homepage and New Tab

Modifica las siguientes entradas de registro:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = http://hp.{BLOCKED}y.com/mydigitalcalendar/ttab02/index.html?n=7857F972&p2=^COP^mni000^TTAB02&ptb=201AB8B3-57F1-4E5E-AE7E-66F837C64A4E&coid=063a79206fb5455b9e4c12a0c489f767