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PUA_INSTALLCORE.GA

July 01, 2015
 Analysis by: Sammy Chua
 ALIASES:

PUA/InstallCore.Gen (Avira); Riskware/InstallCore.AAAA (Fortinet); AdWare.InstallCore (VBA32); Win32.Adware.InstallCore.DY (GData)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan 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:

586,120 bytes

File Type:

EXE

Initial Samples Received Date:

25 Jun 2015

Arrival Details

This Trojan 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 Trojan drops the following files:

  • %Desktop%\Continue FoxTab Video To MP3 Installation.lnk
  • %Program Files%\is{random3}.log
  • %User Temp%\{random4}.log
  • %User Temp%\{random5}.log
  • %User Temp%\{random6}.log
  • %User Temp%\{random7}.log
  • %User Temp%\ICReinstall_{file name}.exe
  • %User Temp%\is{random2}\1242763080.cfg
  • %User Temp%\is{random2}\2049174183.cfg
  • %User Temp%\is{random2}\276652952.cfg
  • %User Temp%\is{random2}\697882_Setup.CIS
  • %User Temp%\is{random2}\697947_Setup.CIS
  • %User Temp%\ish{random1}\blank.gif
  • %User Temp%\ish{random1}\bootstrap_41592.html
  • %User Temp%\ish{random1}\css\buttons.css
  • %User Temp%\ish{random1}\css\ie6_main.css
  • %User Temp%\ish{random1}\css\main.css
  • %User Temp%\ish{random1}\css\sdk-ui\browse.css
  • %User Temp%\ish{random1}\css\sdk-ui\button.css
  • %User Temp%\ish{random1}\css\sdk-ui\checkbox.css
  • %User Temp%\ish{random1}\css\sdk-ui\images\button-bg.png
  • %User Temp%\ish{random1}\css\sdk-ui\images\progress-bg.png
  • %User Temp%\ish{random1}\css\sdk-ui\progress-bar.css
  • %User Temp%\ish{random1}\defaultOffer\US\offer_code.dat
  • %User Temp%\ish{random1}\defaultOffer\US\offer_html.dat
  • %User Temp%\ish{random1}\defaultOffer\offer_code.dat
  • %User Temp%\ish{random1}\defaultOffer\offer_html.dat
  • %User Temp%\ish{random1}\images\Bg.jpg
  • %User Temp%\ish{random1}\images\Software.png
  • %User Temp%\ish{random1}\images\back-button.png
  • %User Temp%\ish{random1}\images\close_button.png
  • %User Temp%\ish{random1}\images\finish-button.png
  • %User Temp%\ish{random1}\images\finish_button.jpg
  • %User Temp%\ish{random1}\images\icon.png
  • %User Temp%\ish{random1}\images\loader.gif
  • %User Temp%\ish{random1}\images\next-button-over.png
  • %User Temp%\ish{random1}\images\next-button.png
  • %User Temp%\ish{random1}\images\progress-bg.png
  • %User Temp%\ish{random1}\images\skip-button.png
  • %User Temp%\ish{random1}\license.txt
  • %User Temp%\ish{random1}\locale\EN.locale

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in 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.. %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.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://cdneu.{BLOCKED}escdn.com/ofr/BabylonToolbarV7.cis
  • http://cdneu.{BLOCKED}escdn.com/Prod/VideoToMP3-v2.cis - inaccessible
  • http://cdnus.{BLOCKED}escdn.com/ofr/BabylonToolbarV7.cis
  • http://cdnus.{BLOCKED}escdn.com/Prod/VideoToMP3-v2.cis - inaccessible
  • http://os.{BLOCKED}escdn.com
  • http://os.{BLOCKED}escdn.com/fx/v1.0.1/?v=2.0&c=249754306 - inaccessible
  • http://os.{BLOCKED}escdn.com/Prod/VideoToMP3-v2.cis
  • http://rp.{BLOCKED}escdn.com/?pcrc=1812873480
  • http://rp.{BLOCKED}escdn.com/?pcrc=791894169
  • http://rp.{BLOCKED}escdn.com/vscript/utils/ip2cc.psc - inaccessible
  • http://soft.{BLOCKED}b.com/video-to-mp3/ga/uninstall/?sr=ga&lp=sf& - inaccessible