Analysis by: Mc Justine De Guzman
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

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. It may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 2,034 bytes
File Type: VBS
Memory Resident: No
Initial Samples Received Date: 24 Feb 2022
Payload: Connects to URLs/IPs, Downloads files, Displays message/message boxes

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.

It may be dropped by the following malware:

  • Trojan.X97M.EMOTET.YXCBX

Installation

This Trojan adds the following processes:

  • powershell.exe -command {powershell command}
  • "%System%\cmd.exe" /c start /B %Windows%\syswow64\regsvr32.exe /s %ProgramData%\oiphilfj.dll

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.)

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}eetbomb.com/wp-content/15zZybP1EXttxDK4JH/
  • https://{BLOCKED}she.com/wp-includes/z92ZVqHH8/
  • http://{BLOCKED}ogreen.mightcode.com/Fox-C/NWssAbNOJDxhs/
  • http://{BLOCKED}t.co.in/infructuose/m4mgt2MeU/
  • http://mtc.{BLOCKED}g.org.za/-/GBGJeFxXWlNbABv2/
  • http://www.{BLOCKED}a.cu/jpr/VVP/
  • http://actividades.{BLOCKED}languages.com/wp-admin/dU8Ds/
  • https://{BLOCKED}ter.com/wp-content/1sR2HfFxQnkWuu/
  • https://{BLOCKED}ia.cn/wp-admin/0JAE/
  • https://{BLOCKED}ygroup.cl/office/G42LJPLkl/
  • https://{BLOCKED}u.top/mode/0Qb/

It saves the files it downloads using the following names:

  • %ProgramData%\oiphilfj.dll → detected as TrojanSpy.Win32.EMOTET.YXCBZZ

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.)

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 17.404.03
FIRST VSAPI PATTERN DATE: 24 Feb 2022
VSAPI OPR PATTERN File: 17.405.00
VSAPI OPR PATTERN Date: 25 Feb 2022

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.VBS.TRX.XXVBS82EFF023

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

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.
  • %ProgramData%\bbiwjdf.vbs
  • %ProgramData%\oiphilfj.dll

Step 5

Scan your computer with your Trend Micro product to delete files detected as Trojan.VBS.EMOTET.YJCBX. 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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