Trojan.MSIL.NEGASTEAL.THIBBBC

October 17, 2023

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 Analysis by: Jayvee Mark Villaroman

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 ALIASES:

Trojan:Win32/Wacatac.B!ml (MICROSOFT)

 PLATFORM:

Windows

 OVERALL RISK RATING:

 DAMAGE POTENTIAL:

 DISTRIBUTION POTENTIAL:

 REPORTED INFECTION:

 INFORMATION EXPOSURE:

• 
  Threat Type: Trojan
• 
  Destructiveness: No
• 
  Encrypted: Yes
• 
  In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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.

  TECHNICAL DETAILS

File Size:

4,457,984 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

22 Sep 2023

Payload:

Downloads files, Connects to URLs/IPs

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.

Other Details

This Trojan does the following:

• It uses assembly loading and accepts a URL as a parameter. It downloads and executes a payload from the provided malicious URL.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.712.05

FIRST VSAPI PATTERN DATE:

22 Sep 2023

VSAPI OPR PATTERN File:

18.713.00

VSAPI OPR PATTERN Date:

23 Sep 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 Trojan.MSIL.NEGASTEAL.THIBBBC. 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:

• Home and Home Office Support
• Business Support

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