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PUA_INSTALLCORE.GAC

May 09, 2018
 Analysis by: Wilbert Vidal
 ALIASES:

PUA:Win32/InstallCore (Microsoft); Adware.InstallCore(AVware)

 PLATFORM:

Windows

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

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Potentially Unwanted Application 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

File Size:

1,845,928 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

02 May 2018

Arrival Details

This Potentially Unwanted Application 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 Potentially Unwanted Application adds the following folders:

  • %User Temp%\inH{random numbers}
  • %User Temp%\inH{random numbers}\css
  • %User Temp%\inH{random numbers}\css\sdk-ui
  • %User Temp%\inH{random numbers}\css\sdk-ui\images
  • %User Temp%\inH{random numbers}\images
  • %User Temp%\inH{random numbers}\locale

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It drops the following files:

  • %User Temp%\{random number}.log
  • %User Temp%\inH{random number}\csshover3.htc
  • %User Temp%\inH{random number}\form.bmp.Mask
  • %User Temp%\inH{random number}\css\ie6_main.css
  • %User Temp%\inH{random number}\css\main.css
  • %User Temp%\inH{random number}\css\sdk-ui\browse.css
  • %User Temp%\inH{random number}\css\sdk-ui\button.css
  • %User Temp%\inH{random number}\css\sdk-ui\checkbox.css
  • %User Temp%\inH{random number}\css\sdk-ui\progress-bar.css
  • %User Temp%\inH{random number}\css\sdk-ui\images\button-bg.png
  • %User Temp%\inH{random number}\css\sdk-ui\images\progress-bg-corner.png
  • %User Temp%\inH{random number}\css\sdk-ui\images\progress-bg.png
  • %User Temp%\inH{random number}\css\sdk-ui\images\progress-bg2.png
  • %User Temp%\inH{random number}\images\BG.png
  • %User Temp%\inH{random number}\images\Close.png
  • %User Temp%\inH{random number}\images\Close_Hover.png
  • %User Temp%\inH{random number}\images\Color_Button.png
  • %User Temp%\inH{random number}\images\Color_Button_Hover.png
  • %User Temp%\inH{random number}\images\default_tb.png
  • %User Temp%\inH{random number}\images\default_wi.png
  • %User Temp%\inH{random number}\images\Grey_Button.png
  • %User Temp%\inH{random number}\images\Grey_Button_Hover.png
  • %User Temp%\inH{random number}\images\Icon_Generic.png
  • %User Temp%\inH{random number}\images\Loader.gif
  • %User Temp%\inH{random number}\images\Pause_Button.png
  • %User Temp%\inH{random number}\images\Progress.png
  • %User Temp%\inH{random number}\images\ProgressBar.png
  • %User Temp%\inH{random number}\images\Quick_Specs.png
  • %User Temp%\inH{random number}\images\Resume_Button.png
  • %User Temp%\inH{random number}\images\sponsored.png
  • %User Temp%\inH{random number}\locale\CS.locale
  • %User Temp%\inH{random number}\locale\DA.locale
  • %User Temp%\inH{random number}\locale\DE.locale
  • %User Temp%\inH{random number}\locale\EL.locale
  • %User Temp%\inH{random number}\locale\EN.locale
  • %User Temp%\inH{random number}\locale\ES.locale
  • %User Temp%\inH{random number}\locale\FI.locale
  • %User Temp%\inH{random number}\locale\FR.locale
  • %User Temp%\inH{random number}\locale\ID.locale
  • %User Temp%\inH{random number}\locale\IT.locale
  • %User Temp%\inH{random number}\locale\JA.locale
  • %User Temp%\inH{random number}\locale\KO.locale
  • %User Temp%\inH{random number}\locale\NL.locale
  • %User Temp%\inH{random number}\locale\NO.locale
  • %User Temp%\inH{random number}\locale\PL.locale
  • %User Temp%\inH{random number}\locale\PT.locale
  • %User Temp%\inH{random number}\locale\RU.locale
  • %User Temp%\inH{random number}\locale\SV.locale
  • %User Temp%\inH{random number}\locale\TR.locale
  • %User Temp%\inH{random number}\locale\ZH.locale
  • %User Temp%\inH{random number}\bootstrap_7239.html
  • %Program Files%\{random number}.log

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}ddpnoheni.com/
  • http://{BLOCKED}.{BLOCKED}ddpnoheni.com/Poweriso/