Analysis by: Melvin Jhun Palbusa
 Modified by: Raymart Christian Yambot
 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

This Trojan Spy 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: 322238464 bytes
File Type: EXE
File Compression: Delphi
Memory Resident: No
Initial Samples Received Date: 18 Oct 2023
Payload: Connects to URLs/IPs, Collects system information, Steals information

Arrival Details

This Trojan Spy 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 Spy adds the following mutexes to ensure that only one of its copies runs at any one time:

  • FA1EA8E940963B9A3B51F33824D877A8

It terminates itself if it finds the following processes in the affected system's memory:

  • ResourceHacker.exe
  • JoeTrace.exe
  • PCHunter32.exe
  • PCHunter64.exe
  • ProcessHacker.exe
  • procexp.exe
  • procexp64.exe
  • Wireshark.exe
  • filemon.exe
  • procmon.exe
  • regmon.exe

Information Theft

This Trojan Spy gathers the following data:

  • System Information:
    • Computername
    • Username
    • Operating System Version
    • IP Address
    • Installed Anti Virus Products
    • Country
    • City
    • Region
    • Zip Code
    • Language
    • Geolocation
    • Time zone information
  • Installed Programs:
    • Mail Clients
      • Microsoft Outlook
      • Software\Clients\Mail
    • Anti-Malware Program
      • C:\Program Files\Trusteer
      • C:\Program Files (x86)\Trusteer
    • Banking
      • C:\Program Files\Diebold\
      • C:\Program Files (x86)\Diebold
      • C:\Program Files\Topaz OFD
      • C:\Program Files (x86)\Topaz OFD
    • Crypto Wallets
      • c:\Program Files\Bitcoin
      • c:\Program Files (x86)\OPOLODesk
      • c:\Program Files\OPOLODesk
      • c:\Program Files (x86)\BitBox
      • c:\Program Files\BitBox
      • c:\Program Files (x86)\Coinomi
      • c:\Program Files\Coinomi
      • c:\Program Files (x86)\Electrum
      • c:\Program Files\Electrum
      • c:\Program Files (x86)\Binance
      • c:\Program Files\Binance
  • Connects to the following URL to retrieve affected system's IP Address
    • http[:]/ip-api[.]com/json

Other Details

This Trojan Spy does the following:

  • It terminates itself if any of the following are satisfied:
    • If the execution is occurring in a Virtual Environment
    • If it is executed from the following directory:
      • D:\script
      • D:\programming
    • If the username matches any of the following:
      • JOHN-PC
      • DESTOP2457
      • difusor
      • Win-StephyPC3
      • WIN-VUA6POUV5U
      • WORK
      • *~+
      • Administrator
  • It retrieves the hostname from the following URL
    • {BLOCKED}m-az.net
      • However as of this writing, the said URL is inaccessible.
  • It requires a successful connection to the C&C server to retrieve the URL responsible for downloading the payload.
  • Completing the captcha is required to execute the malware's routine.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 18.768.05
FIRST VSAPI PATTERN DATE: 20 Oct 2023
VSAPI OPR PATTERN File: 18.769.00
VSAPI OPR PATTERN Date: 21 Oct 2023

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.XXPE50FFF074

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

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.GRANDOREIRO.MLMB. 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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