Analysis by: Mc Justine De Guzman
 Modified by: Bren Matthew Ebriega
 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Canal de infección Downloaded from the Internet

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be hosted on a website and run when a user accesses the said website.

It executes commands from a remote malicious user, effectively compromising the affected system.

  TECHNICAL DETAILS

Tamaño del archivo 1,865 bytes
Tipo de archivo ASP
Residente en memoria No
Fecha de recepción de las muestras iniciales 22 Apr 2021

Arrival Details

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be hosted on a website and run when a user accesses the said website.

Backdoor Routine

This Backdoor executes the following commands from a remote malicious user:

  • Execute arbitrary code.

Other Details

This Backdoor does the following:

  • It receives codes in the request body sent to the compromised web server where it is hosted, contained in the variable "pass".

It requires being hosted on a web server in order to proceed with its intended routine.

  SOLUTION

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 16.672.08
Primera fecha de publicación de patrones de VSAPI 22 Apr 2021
Versión de patrones OPR de VSAPI 16.673.00
Fecha de publicación de patrones OPR de VSAPI 23 Apr 2021

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 Backdoor.ASP.WEBSHELL.UWMAOG. 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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