Analysis by: Maria Emreen Viray

ALIASES:

Worm.INF.Autorun (IKARUS)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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 automatically executes files when a user opens a drive.

  TECHNICAL DETAILS

Tamaño del archivo 90 bytes
Tipo de archivo INF
Residente en memoria No
Fecha de recepción de las muestras iniciales 17 Dec 2021

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

The said .INF file contains the following strings:

[AutoRun]
shell=verb1
shell\verb1\command=desktop.exe
shell\verb1=打?(&O)
shell=Auto

Other Details

This Trojan automatically executes the following files when a user opens a drive:

  • desktop.exe

  SOLUTION

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 17.296.03
Primera fecha de publicación de patrones de VSAPI 05 Jan 2022
Versión de patrones OPR de VSAPI 17.297.00
Fecha de publicación de patrones OPR de VSAPI 06 Jan 2022

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

Search and delete AUTORUN.INF files created by Trojan.INF.BACKTERRA.A that contain these strings

[ Learn More ]
 
  • [AutoRun]
  • shell=verb1
  • shell\verb1\command=desktop.exe
  • shell\verb1=打?(&O)
  • shell=Auto

Step 3

Scan your computer with your Trend Micro product to delete files detected as Trojan.INF.BACKTERRA.A. 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:


Did this description help? Tell us how we did.