Analysis by: Carl Maverick Pascual
 Modified by: John Rey Canon
 PLATFORM:

Windows, Linux, MacOS

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Canal de infecção: Downloaded from the Internet, Dropped by other malware

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.

It requires being executed with a specific argument/parameter, an additional component, or in a specific environment in order to proceed with its intended routine. This malicious script runs on web browsers, which may be installed on any operating system.

  TECHNICAL DETAILS

Tipo de compactação: 597 bytes
Tipo de arquivo: PHP
Residente na memória: No
Data de recebimento das amostras iniciais: 28 May 2019

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 receive codes from the attacker via POST command on this hosted php file with the variable "n9e5e25".

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

It requires being executed with a specific argument/parameter, an additional component, or in a specific environment in order to proceed with its intended routine.

This malicious script runs on web browsers, which may be installed on any operating system.

  SOLUTION

Mecanismo de varredura mínima: 9.850
Primeiro arquivo padrão VSAPI: 15.140.02
Data do lançamento do primeiro padrão VSAPI: 29 May 2019
VSAPI OPR Pattern Version: 15.141.00
VSAPI OPR Pattern veröffentlicht am: 30 May 2019

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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as Backdoor.PHP.WEBSHELL.BGHIOQ. 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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