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Adware.Win32.Installcore.TIQVCH

March 04, 2024
 Analysis by: John Rainier Navato
 ALIASES:

Win32/InstallCore.Gen.A (NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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.

It does not have any propagation routine.

It does not have any backdoor routine.

As of this writing, the said sites are inaccessible.

It does not have any information-stealing capability.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

677,832 bytes

Memory Resident:

No

Initial Samples Received Date:

19 Feb 2024

Payload:

Connects to URLs/IPs

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 adds the following folders:

  • %User Temp%\is{Random}
  • %User Temp%\ish{Random}
  • %User Temp%\ish{Random}\css
  • %User Temp%\ish{Random}\css\sdk-ui
  • %User Temp%\ish{Random}\css\sdk-ui\images
  • %User Temp%\ish{Random}\images
  • %User Temp%\ish{Random}\locale

(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).)

It drops the following files:

  • %User Temp%\{Random}.log
  • %User Temp%\ish{Random}\css\ie6_main.css
  • %User Temp%\ish{Random}\css\main.css
  • %User Temp%\ish{Random}\css\sdk-ui\browse.css
  • %User Temp%\ish{Random}\css\sdk-ui\button.css
  • %User Temp%\ish{Random}\css\sdk-ui\checkbox.css
  • %User Temp%\ish{Random}\css\sdk-ui\images\button-bg.png
  • %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg-corner.png
  • %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg.png
  • %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg2.png
  • %User Temp%\ish{Random}\css\sdk-ui\progress-bar.css
  • %User Temp%\ish{Random}\csshover3.htc
  • %User Temp%\ish{Random}\form.bmp.Mask
  • %User Temp%\ish{Random}\images\BG.png
  • %User Temp%\ish{Random}\images\Close.png
  • %User Temp%\ish{Random}\images\Close_Hover.png
  • %User Temp%\ish{Random}\images\Color_Button.png
  • %User Temp%\ish{Random}\images\Color_Button_Hover.png
  • %User Temp%\ish{Random}\images\default_tb.png
  • %User Temp%\ish{Random}\images\default_wi.png
  • %User Temp%\ish{Random}\images\Grey_Button.png
  • %User Temp%\ish{Random}\images\Grey_Button_Hover.png
  • %User Temp%\ish{Random}\images\Icon_Generic.png
  • %User Temp%\ish{Random}\images\Loader.gif
  • %User Temp%\ish{Random}\images\Pause_Button.png
  • %User Temp%\ish{Random}\images\Progress.png
  • %User Temp%\ish{Random}\images\ProgressBar.png
  • %User Temp%\ish{Random}\images\Quick_Specs.png
  • %User Temp%\ish{Random}\images\Resume_Button.png
  • %User Temp%\ish{Random}\images\sponsored.png
  • %User Temp%\ish{Random}\locale\CS.locale
  • %User Temp%\ish{Random}\locale\DA.locale
  • %User Temp%\ish{Random}\locale\DE.locale
  • %User Temp%\ish{Random}\locale\EL.locale
  • %User Temp%\ish{Random}\locale\EN.locale
  • %User Temp%\ish{Random}\locale\ES.locale
  • %User Temp%\ish{Random}\locale\FI.locale
  • %User Temp%\ish{Random}\locale\FR.locale
  • %User Temp%\ish{Random}\locale\ID.locale
  • %User Temp%\ish{Random}\locale\IT.locale
  • %User Temp%\ish{Random}\locale\JA.locale
  • %User Temp%\ish{Random}\locale\KO.locale
  • %User Temp%\ish{Random}\locale\NL.locale
  • %User Temp%\ish{Random}\locale\NO.locale
  • %User Temp%\ish{Random}\locale\PL.locale
  • %User Temp%\ish{Random}\locale\PT.locale
  • %User Temp%\ish{Random}\locale\RU.locale
  • %User Temp%\ish{Random}\locale\SV.locale
  • %User Temp%\ish{Random}\locale\TR.locale
  • %User Temp%\ish{Random}\locale\ZH.locale
  • %User Temp%\ish{Random}\bootstrap_48055.html
  • %User Temp%\ICReinstall_google-chrome-setup.exe
  • %Desktop%\Continue ダウンロードしてインストール Installation.lnk
  • %User Temp%\is{Random}\{Random}_stp.EXE
  • %User Temp%\is{Random}\{Random}_stp.EXE.part

(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).. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Propagation

This Adware does not have any propagation routine.

Backdoor Routine

This Adware does not have any backdoor routine.

Rootkit Capabilities

This Adware does not have rootkit capabilities.

Download Routine

This Adware connects to the following URL(s) to download its component file(s):

  • http://{BLOCKED}reddownloadcdn.com/SecuredDownload/?v=3.0&c={Random}
  • http://{BLOCKED}ureddownloadcdn.com/SecuredDownload/?v=3.0&c={Random}
  • http://{BLOCKED}reddownloadcdn.com/?pcrc={Random}
  • http://{BLOCKED}cloudfiledownload1398811247.s3-website-eu-west-1.amazonaws.com/504405/system/0.html
  • http://{BLOCKED}cloudfiledownload1398811247.s3-website-eu-west-1.amazonaws.com/504405/system/4.html
  • http://{BLOCKED}cloudfiledownload1398811247.s3-website-eu-west-1.amazonaws.com/second/s/504405/GoogleChromePortable_27.0.1453.93_online.paf.exe
  • http://{BLOCKED}p//securecloudfiledownload1398811247.s3-website-eu-west-1.amazonaws.com/second/s/504405/GoogleChromePortable_27.0.1453.93_online.paf.exe&product=%EF%BF%BD_%EF%BF%BDE%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD[%EF%BF%BDh%EF%BF%BD%EF%BF%BD%EF%BF%BD%C4%83C%EF%BF%BD%EF%BF%BD%EF%BF%BDX%EF%BF%BDg%EF%BF%BD[%EF%BF%BD%EF%BF%BD&sample_date=

As of this writing, the said sites are inaccessible.

Information Theft

This Adware does not have any information-stealing capability.

Other Details

This Adware does the following:

  • It displays the following during installation:



  • It opens the following URL in a web browser:
    • http://{BLOCKED}cloudfiledownload1398811247.s3-website-eu-west-1.amazonaws.com/504405/system/3.html

However, as of this writing, the said sites are inaccessible.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.707.00

SSAPI PATTERN Date:

07 Mar 2024

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\{Random}.log
  • %User Temp%\ish{Random}\css\ie6_main.css
  • %User Temp%\ish{Random}\css\main.css
  • %User Temp%\ish{Random}\css\sdk-ui\browse.css
  • %User Temp%\ish{Random}\css\sdk-ui\button.css
  • %User Temp%\ish{Random}\css\sdk-ui\checkbox.css
  • %User Temp%\ish{Random}\css\sdk-ui\images\button-bg.png
  • %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg-corner.png
  • %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg.png
  • %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg2.png
  • %User Temp%\ish{Random}\css\sdk-ui\progress-bar.css
  • %User Temp%\ish{Random}\csshover3.htc
  • %User Temp%\ish{Random}\form.bmp.Mask
  • %User Temp%\ish{Random}\images\BG.png
  • %User Temp%\ish{Random}\images\Close.png
  • %User Temp%\ish{Random}\images\Close_Hover.png
  • %User Temp%\ish{Random}\images\Color_Button.png
  • %User Temp%\ish{Random}\images\Color_Button_Hover.png
  • %User Temp%\ish{Random}\images\default_tb.png
  • %User Temp%\ish{Random}\images\default_wi.png
  • %User Temp%\ish{Random}\images\Grey_Button.png
  • %User Temp%\ish{Random}\images\Grey_Button_Hover.png
  • %User Temp%\ish{Random}\images\Icon_Generic.png
  • %User Temp%\ish{Random}\images\Loader.gif
  • %User Temp%\ish{Random}\images\Pause_Button.png
  • %User Temp%\ish{Random}\images\Progress.png
  • %User Temp%\ish{Random}\images\ProgressBar.png
  • %User Temp%\ish{Random}\images\Quick_Specs.png
  • %User Temp%\ish{Random}\images\Resume_Button.png
  • %User Temp%\ish{Random}\images\sponsored.png
  • %User Temp%\ish{Random}\locale\CS.locale
  • %User Temp%\ish{Random}\locale\DA.locale
  • %User Temp%\ish{Random}\locale\DE.locale
  • %User Temp%\ish{Random}\locale\EL.locale
  • %User Temp%\ish{Random}\locale\EN.locale
  • %User Temp%\ish{Random}\locale\ES.locale
  • %User Temp%\ish{Random}\locale\FI.locale
  • %User Temp%\ish{Random}\locale\FR.locale
  • %User Temp%\ish{Random}\locale\ID.locale
  • %User Temp%\ish{Random}\locale\IT.locale
  • %User Temp%\ish{Random}\locale\JA.locale
  • %User Temp%\ish{Random}\locale\KO.locale
  • %User Temp%\ish{Random}\locale\NL.locale
  • %User Temp%\ish{Random}\locale\NO.locale
  • %User Temp%\ish{Random}\locale\PL.locale
  • %User Temp%\ish{Random}\locale\PT.locale
  • %User Temp%\ish{Random}\locale\RU.locale
  • %User Temp%\ish{Random}\locale\SV.locale
  • %User Temp%\ish{Random}\locale\TR.locale
  • %User Temp%\ish{Random}\locale\ZH.locale
  • %User Temp%\ish{Random}\bootstrap_48055.html
  • %User Temp%\ICReinstall_google-chrome-setup.exe
  • %Desktop%\Continue ダウンロードしてインストール Installation.lnk
  • %User Temp%\is{Random}\{Random}_stp.EXE
  • %User Temp%\is{Random}\{Random}_stp.EXE.part

Step 4

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %User Temp%\ish{Random}
  • %User Temp%\ish{Random}\css\sdk-ui\images
  • %User Temp%\ish{Random}\css\sdk-ui
  • %User Temp%\ish{Random}\css
  • %User Temp%\ish{Random}\images
  • %User Temp%\ish{Random}\locale
  • %User Temp%\is{Random}

Step 5

Scan your computer with your Trend Micro product to delete files detected as Adware.Win32.Installcore.TIQVCH. 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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