TROJAN.PHP.WEBSHELL.AO

November 13, 2018
 Analysis by: Kiyoshi Obuchi
 PLATFORM:

Windows, Linux, MacOS

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

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

File Size:

7,228 bytes

File Type:

PHP

Initial Samples Received Date:

05 Nov 2018

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.

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

Other Details

This Trojan 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

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.614.03

FIRST VSAPI PATTERN DATE:

08 Nov 2018

VSAPI OPR PATTERN File:

14.615.00

VSAPI OPR PATTERN Date:

09 Nov 2018

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 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 TROJAN.PHP.WEBSHELL.AO. 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:

NOTES:

For Linux and MacOS: Please skip the first step which is “Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.”


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