Analysis by: Denisse Camille Layco
ALIASES:

VBA.Heur.Emotet.1.EB9CE3F3.Gen(BITDEFENDER); TrojanDownloader:O97M/IcedID.ICD!MTB(MICROSOFT)

 PLATFORM:

Windows

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

  • 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: 100,371 bytes
Memory Resident: No
Initial Samples Received Date: 10 Nov 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.

Installation

This Trojan drops the following files:

  • %User Temp%\in.com
  • %User Temp%\in.html

It adds the following processes:

  • %User Temp%\in.com %User Temp%\in.html
  • "%System%\regsvr32.exe" %User Temp%\temp.tmp

Other System Modifications

This Trojan deletes the following registry keys:

HKEY_CURRENT_USER\Software\mysoftware1
key1 = {data}

Other Details

This Trojan adds the following lines or registry entries as part of its routine:

  • HKEY_CURRENT_USER\Software\mysoftware1

It connects to the following possibly malicious URL:

  • http://{BLOCKED}5428.com/update/lFtjCLtUzQAk/EEbR_bIviWPFKbNvDZemEbqswGYhQBSCyHaxB/iuyala2

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

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.348.06
FIRST VSAPI PATTERN DATE: 13 Nov 2020
VSAPI OPR PATTERN File: 16.349.00
VSAPI OPR PATTERN Date: 14 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.XXVBAF01FF011

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 4

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • HKEY_CURRENT_USER\Software\mysoftware1

Step 5

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.
  • %User Temp%\in.com
  • %User Temp%\in.html

Step 6

Scan your computer with your Trend Micro product to delete files detected as Trojan.W97M.ICEDID.FAID. 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 7

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]


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