Analysis by: Denisse Camille Layco
ALIASES:

W64/Emotet.E5AE!tr(FORTINET); Trojan.BazarLoader(IKARUS)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • 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.

As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 174,080 bytes
Initial Samples Received Date: 12 Sep 2020
Payload: Connects to URLs/IPs, Downloads files

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.

Download Routine

This Backdoor connects to the following URL(s) to download its component file(s):

  • https://{BLOCKED}eswork.net/components/default.mp3

As of this writing, the said sites are inaccessible.

Other Details

This Backdoor requires the following additional components to properly run:

  • default.mp3 → will be loaded in memory

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.302.03
FIRST VSAPI PATTERN DATE: 22 Oct 2020
VSAPI OPR PATTERN File: 16.303.00
VSAPI OPR PATTERN Date: 23 Oct 2020

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

     BKDR.Win32.TRX.XXPE50FFF037E0002 (GENERIC: Hit Bad Auto Shield)

Step 2

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 3

Scan your computer with your Trend Micro product to delete files detected as Backdoor.Win64.BAZAR.A. 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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