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TrojanSpy.Win32.GRANDOREIRO.MLMA

November 14, 2023
 Analysis by: Leidryn Saludez
 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • 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:

246742704 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 Oct 2023

Payload:

Collects system information, Connects to URLs/IPs, Modifies system registry

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:

  • IntelWassing39

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

  • regmon.exe
  • filemon.exe
  • Wireshark.exe
  • ProcessHacker.exe
  • PCHunter64.exe
  • PCHunter32.exe
  • JoeTrace.exe
  • ResourceHacker.exe

Information Theft

This Trojan Spy gathers the following data:

  • Username
  • Computer Name
  • System Information
  • OS Name and Version
  • Hostname
  • Geolocation
  • IP Address
  • List of Installed Applications
  • List of Installed Antivirus
  • Date and Time of Execution

Other Details

This Trojan Spy does the following:

  • It compares the country code of the affected system before proceeding to its original routine to the following targeted countries:
    • GT - Guatemala
    • HN - Honduras
    • MX - Mexico
    • NI - Nicaragua
    • PA - Panama
    • SV - El Salvador
    • AR - Argentina
    • BO - Bolivia
    • BR - Brazil
    • EC - Ecuador
    • PE - Peru
    • PY - Paraguay
    • UY - Uruguay
    • VE - Venezuela
    • BB - Barbados
    • BS - Bahamas
    • DO - Dominican Republic
    • HT - Haiti
    • JM - Jamaica
    • KY - Cayman Islands
    • CH - Switzerland
    • IT - Italy
    • PL - Poland
    • UK - United Kingdom
    • FR - France
    • ES - Spain
    • IE - Ireland
  • It compares the Hostname of the affected system before proceeding to its original routine to the following:
    • WIN-VUA6POUV5UP
    • JOHN-PC
    • WORK
  • It compares the OS Name of the affected system before proceeding to its original routine to the following:
    • Windows XP
    • Windows Vista
    • Windows 7
    • Windows 8
    • Windows 10
    • Windows 11
  • This Trojan Spy connects to the following URL(s) to get the affected system's IP address:
    • http://{BLOCKED}i.com/json
  • It uses Domain Genaration Algorithm (DGA) to generate its C2 Server.
  • It has keylogging capabilities.
  • It steals information from the following applications if found in the affected system:
    • Mail Client:
      • Microsoft Outlook
      • Software\Clients\Mail
    • Banking:
      • ACB Carribean
      • Alliance Bank
      • Allied Bank
      • Atlantic Bank
      • Banco BISA
      • Banco Unión
      • Banco de Crédito
      • Banco Nacional
      • Banco Económico
      • Banco Ganadero
      • BNamericas
      • Banco Los Andes
      • Banco Mercantil
      • Banca por Internet
      • BMSC
      • BancoSol
      • Bank of Valletta
      • BBVA
      • Belize Bank
      • Butterfield Group
      • Caja de Ahorros
      • Choice Bank
      • CIBC
      • CIBC First Carribean
      • Citibank
      • Credit Suisse
      • Davivienda
      • Doral Bank
      • e-Bandes
      • e-Bisa
      • FIMBank
      • HRCU Online Account
      • HSBC Malta
      • IIG Bank
      • Inicio
      • FISE
      • MEXC Exchange
      • Orco Bank
      • Provincia Casa Financiera
      • Raiffeisen-Gruppe
      • Republic Bank
      • RepublicOnline Corporate
      • Santander
      • Scotia Bank
      • Synchrony Bank
      • UBS E-Banking
    • Stocks:
      • Fortex
    • Cryptocurrency Wallet:
      • Armory
      • Atomic Wallet
      • Binance
      • Bisq
      • Bitbox
      • Bither
      • Blockstream
      • BTC-CORE
      • Coinomi
      • Daedalus
      • Electrum
      • Hotbit Global
      • Ledger
      • Monero
      • OPOLODesk
      • Trezor
      • Trust Wallet
      • WasabiWallet

  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

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

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