TrojanSpy.MSIL.LUMMASTEALER.THABHBE

February 13, 2025
 Analysis by: Leidryn Saludez
 ALIASES:

Trojan:MSIL/LummaStealer!rfn (MICROSOFT)

 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.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

1,405,440 bytes

File Type:

EXE

Initial Samples Received Date:

27 Jan 2025

Payload:

Collects system information, Connects to URLs/IPs

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.

Information Theft

This Trojan Spy gathers the following data:

  • Computer Name
  • OS Information
  • CPU Information
  • Screen Resolution
  • System Language
  • Physical Memory Installed

Stolen Information

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

  • https://{BLOCKED}tedusz.cyou/api

Other Details

This Trojan Spy connects to the following website to send and receive information:

  • https://{BLOCKED}ob.shop/int_clp_8888.txt

It does the following:

  • It bypasses the Antimalware Scan Interface (AMSI).
  • It exfiltrates crypto currency browser wallet extensions and 2FA applications.
  • It compiles and compresses the stolen information in memory before sending it to the C&C server.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

19.866.03

FIRST VSAPI PATTERN DATE:

28 Jan 2025

VSAPI OPR PATTERN File:

19.867.00

VSAPI OPR PATTERN Date:

29 Jan 2025

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.XXPE50FFF090

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.MSIL.LUMMASTEALER.THABHBE. 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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