Analysis by: John Rainier Navato

 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

Infection Channel: 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.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 61,124 bytes
File Type: PHP
Memory Resident: No
Initial Samples Received Date: 21 Jun 2024
Payload: Connects to URLs/IPs, Displays windows, Steals information

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

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.

Dropping Routine

This Trojan drops the following files:

  • {Malware File Path}\out.php → contains list of email addresses to where the created email was sent

Information Theft

This Trojan gathers the following data:

  • Web form data
  • Client IP address
  • Client hostname
  • Server name

Other Details

This Trojan does the following:

  • It enables its user to create and send an e-mail to target e-mail addresses using PHP library.
  • It uses the following web form to input custom information for e-mail creation purpose:
  • It connects to the following URLs to identify the server's IP address's location:
    • http://{BLOCKED}geo.com/api/index.php
  • It sends the gathered information to a specific email address.

However, as of this writing, the said sites are inaccessible.

It does not exploit any vulnerability.

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

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 19.432.03
FIRST VSAPI PATTERN DATE: 28 Jun 2024
VSAPI OPR PATTERN File: 19.433.00
VSAPI OPR PATTERN Date: 29 Jun 2024

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 this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • {Malware File Path}\out.php

Step 3

Scan your computer with your Trend Micro product to delete files detected as Trojan.PHP.MAILER.C. 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.