Analysis by: Mariefher Grace Villanueva
ALIASES:

Trojan:Win32/Etset!rfn (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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.

It does not have any propagation routine.

It does not have any backdoor routine.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size: 20,615 bytes
File Type: ZIP
File Compression: ZIP
Memory Resident: No
Initial Samples Received Date: 18 Feb 2026
Payload: Connects to URLs/IPs, Downloads files

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.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Rootkit Capabilities

This Trojan does not have rootkit capabilities.

Information Theft

This Trojan does not have any information-stealing capability.

Other Details

This Trojan does the following:

  • It is a zip file which contains the following file:
    • Shipping Documents Invoice No. 18145-GN 17.02.2026.vbe
  • The extracted VB file will do the following if executed:
    • Adds the following process:
      • wscript.exe "Shipping Documents Invoice No. 18145-GN 17.02.2026"
    • Connects to the following website(s) to download and execute a possibly malicious file:
      • https://{BLOCKED}-kk-co.asia/dev/ENCRYPTED.ps1 → as of writing, the said site is inaccessible

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 20.800.04
FIRST VSAPI PATTERN DATE: 03 Mar 2026
VSAPI OPR PATTERN File: 20.801.00
VSAPI OPR PATTERN Date: 04 Mar 2026

Scan your computer with your Trend Micro product to delete files detected as Trojan.VBS.POWLOAD.J. 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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