Analysis by: Nathaniel Gregory Ragasa
 Modified by: Jeffrey Francis Bonaobra
 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.

  TECHNICAL DETAILS

File Size: 3,242 bytes
File Type: HTML, HTM, HTA
Memory Resident: No
Initial Samples Received Date: 20 Jun 2022
Payload: Connects to URLs/IPs, Displays windows

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.

Other Details

This Trojan does the following:

  • It displays an interface that accepts file upload and arbitrary commands.
  • It connects to the following URLs for the logo displayed inside the webpage:
    • https://cdn.{BLOCKED}yz.com/images/logo.jpg
  • It connects to the following URL for the webpage layout:
    • https://{BLOCKED}yz.com/wp-content/themes/privdaysv1/hacker.css
  • It redirects to the following URL if the logo in the webpage is clicked:
    • https://{BLOCKED}yz.com
  • It may execute an arbitrary command via the following functions:
    • shell_exec
    • exec
    • popen
    • passthru
    • system

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 17.630.04
FIRST VSAPI PATTERN DATE: 16 Jun 2022
VSAPI OPR PATTERN File: 17.631.00
VSAPI OPR PATTERN Date: 17 Jun 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

Scan your computer with your Trend Micro product to delete files detected as Trojan.HTML.MALINK.FASJSNOSM. 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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