PUA_BUNDLER.GA

June 20, 2018
 Analysis by: Johnlery Triunfante
 ALIASES:

Trojan.Gen.2 (Norton); Trojan.Win32.Generic!BT (Sunbelt)

 PLATFORM:

Windows

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

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

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. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size:

397,181 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

06 Mar 2017

Payload:

Drops files, Connects to URLs/IPs

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.

It may be manually installed by a user.

Installation

This Potentially Unwanted Application drops the following files:

  • %Program Files%\WIFI\WIFI.exe
  • %User Temp%\nsv{random characters}.tmp\InstallOptions.dll ← Deleted after installation
  • %User Temp%\nsv{random characters}.tmp\KillProcDLL.dll ← Deleted after installation
  • %User Temp%\nsv{random characters}.tmp\ioSpecial.ini ← Deleted after installation
  • %User Temp%\nsv{random characters}.tmp\modern-wizard.bmp ← Deleted after installation

(Note: %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.)

Autostart Technique

This Potentially Unwanted Application drops the following files:

  • %Desktop%\³©ÏíWIFI.lnk
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\³©ÏíWIFI\³©ÏíWIFI.lnk
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\³©ÏíWIFI\жÔس©ÏíWIFI.lnk

(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.. %ProgramData% is the Program Data folder, where it usually is C:\Program Files in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData 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.)

Download Routine

This Potentially Unwanted Application saves the files it downloads using the following names:

  • %User Temp%\2345pic_lm_509718_v6.3.7488_silent.exe

(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.)

NOTES:

This Potentially Unwanted Application connects to the following website(s) to download and execute a file:

  • http://{BLOCKED]ad.{BLOCKED}.com/unionpic/2345pic_lm_509718_v6.3.7488_silent.exe

  SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

1.973.00

SSAPI PATTERN Date:

21 Jun 2018

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 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

Identify and terminate files detected as PUA_BUNDLER.GA

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

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.  
  • %Program Files%\WIFI\WIFI.exe
  • %Desktop%\³©ÏíWIFI.lnk
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\³©ÏíWIFI\³©ÏíWIFI.lnk
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\³©ÏíWIFI\жÔس©ÏíWIFI.lnk
  • %User Temp%\2345pic_lm_509718_v6.3.7488_silent.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as PUA_BUNDLER.GA. 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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