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Trojan.MSIL.NEGASTEAL.DYSHRSKJ

June 02, 2023
 Analysis by: Melvin Jhun Palbusa
 Modified by: Francesca Villasanta
 ALIASES:

Trojan:MSIL/AgentTesla.GAP!MTB (MICROSOFT); UDS:Trojan-Spy.MSIL.Noon.gen (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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:

1,638,400 bytes

File Type:

ISO

Memory Resident:

No

Initial Samples Received Date:

01 Jun 2023

Payload:

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.

Installation

This Trojan adds the following processes:

  • "%System%\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "{Malware Filepath}\{Malware Filename}.exe"
  • "{Malware Filepath}\{Malware Filename}.exe"

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other Details

This Trojan connects to the following URL(s) to get the affected system's IP address:

  • http://{BLOCKED}p.dyndns.org/

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.482.03

FIRST VSAPI PATTERN DATE:

02 Jun 2023

VSAPI OPR PATTERN File:

18.483.00

VSAPI OPR PATTERN Date:

03 Jun 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.XXPE50FFF069

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 Trojan.MSIL.NEGASTEAL.DYSHRSKJ. 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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