Analysis by: Paul Steven Nadera
ALIASES:

a variant of WinGo/RanumBot.X trojan (NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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. It arrives as a component bundled with malware/grayware packages.

It does not have any propagation routine.

It does not have any backdoor routine.

It gathers certain information on the affected computer.

  TECHNICAL DETAILS

File Size: 771,584 bytes
File Type: EXE
File Compression: UPX
Memory Resident: Yes
Initial Samples Received Date: 22 Apr 2021

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.

It arrives as a component bundled with malware/grayware packages.

Installation

This Trojan adds the following processes:

  • to execute browser-based fingerprinting script:
    • %Program Files%\Google\Chrome\Application\chrome.exe http://{BLOCKED}nee.com/{BLOCKED}.php?uuid={UUID data}&browser=chrome

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Rootkit Capabilities

This Trojan does not have rootkit capabilities.

Information Theft

This Trojan gathers the following information on the affected computer:

  • UUID from registry key TestApp/{hex generated from SID}
  • Gathered via browser-based fingerprinting script:
    • Ad block Support
    • CPU Information
    • Language
    • Local Storage
    • OS Information
    • Plugins
    • SWF Object or Flash Support
    • Screen Information (Resolution, Color depth)
    • Session Storage
    • Timezone
    • Touch Support
    • User Agent
    • User's Do Not Track setting
    • WebGL Support

Stolen Information

This Trojan sends the gathered information via HTTP POST to the following URL:

  • https://{BLOCKED}nee.com/fp.php

Other Details

This Trojan does the following:

  • Checks if one of the following registry entries exists to continue with its malicious routine:
    • HKEY_USERS\{User SID}\Software\Microsoft\TestApp
      UUID = {string}
    • HKEY_USERS\{User SID}\Software\Microsoft\{hex generated from SID}
      UUID = {string}
  • Finds chrome application from the following paths:
    • %System Root%\Program Files\Google\Chrome\Application\chrome.exe
    • %System Root%\Program Files (x86)\Google\Chrome\Application\chrome.exe

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.760.05
FIRST VSAPI PATTERN DATE: 04 Jun 2021
VSAPI OPR PATTERN File: 16.761.00
VSAPI OPR PATTERN Date: 05 Jun 2021

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

     
    • Troj.Win32.TRX.XXPE50FFF044

Step 2

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 3

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 4

Close all opened browser windows

Step 5

Identify and terminate files detected as Trojan.Win32.GLUPTEBA.WLGG

[ 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 6

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.GLUPTEBA.WLGG. 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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