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Backdoor.Win64.ANONDOOR.THFBFBE

August 01, 2025
 Analysis by: Leidryn Saludez
 ALIASES:

Trojan-Downloader.MSIL.Agent (IKARUS)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

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 connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

37,376 bytes

File Type:

EXE

Initial Samples Received Date:

25 Jun 2025

Payload:

Collects system information, Connects to URLs/IPs, Steals information

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.

Information Theft

This Backdoor gathers the following data:

  • OS Version
  • Local IP address
  • Host Name
  • Public IP address
  • IP location

Other Details

This Backdoor connects to the following URL(s) to get the affected system's IP address:

  • http://{BLOCKED}i.com

It connects to the following website to send and receive information:

  • {BLOCKED}.{BLOCKED}.{BLOCKED}.205
  • http://{BLOCKED}.{BLOCKED}.{BLOCKED}.34.bc.googleusercontent.com
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.241

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

20.288.01

FIRST VSAPI PATTERN DATE:

25 Jun 2025

VSAPI OPR PATTERN File:

20.289.00

VSAPI OPR PATTERN Date:

26 Jun 2025

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.Win64.ANONDOOR.THFBFBE. 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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