Analysis by: Raighen Sanchez
ALIASES:

VirTool:INF/Autorun.gen!A [generic] (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

Canal de infección 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

Tamaño del archivo 51 bytes
Tipo de archivo INF
Residente en memoria No
Fecha de recepción de las muestras iniciales 14 Mar 2025

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:

  • yj.exe

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:

  • The said .INF file contains the following strings:
    [AutoRun]
    open=yj.exe
    shell\open\Command=yj.exe

It does not exploit any vulnerability.

  SOLUTION

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 20.128.02
Primera fecha de publicación de patrones de VSAPI 07 Apr 2025
Versión de patrones OPR de VSAPI 20.129.00
Fecha de publicación de patrones OPR de VSAPI 08 Apr 2025

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.INF.OTORUN.L. 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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