Analysis by: Denisse Camille Layco

ALIASES:

TrojanDownloader:O97M/Obfuse.YBF!MTB (MICROSOFT); W97M/Downloader.dgw (NAI)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • 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.

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

  TECHNICAL DETAILS

File Size: 160,278 bytes
Initial Samples Received Date: 07 Dec 2020

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 connects to the following possibly malicious URL:

  • {BLOCKED}13.com/update/_xZHlYFyAWZKbcKbAgLgc/qoNdvPtbvNSBMfgGL/DpzPkWhisGRjjAlVnGKyzuB/chti2

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

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.356.08
FIRST VSAPI PATTERN DATE: 17 Nov 2020
VSAPI OPR PATTERN File: 16.357.00
VSAPI OPR PATTERN Date: 18 Nov 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:

     
    • Downloader.VBA.TRX.XXVBAF01FF012

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 Trojan.W97M.ICEDID.SMAG. 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:

Step 4

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]


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