TrojanSpy.JS.NEMUCOD.BONINGI

 Analysis by: Joshua Paul Ignacio

 ALIASES:

N/A

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


This Trojan Spy may be downloaded by other malware/grayware from remote sites.

  TECHNICAL DETAILS

File Size:

330,191 bytes

File Type:

HTA

Memory Resident:

Yes

Initial Samples Received Date:

07 Apr 2020

Payload:

Connects to URLs/IPs, Steals information

Arrival Details

This Trojan Spy may be downloaded by the following malware/grayware from remote sites:

Installation

This Trojan Spy drops the following files:

  • %All Users Profile%\fontFiles\rekeywiz.exe
  • %All Users Profile%\fontFiles\Duser.dll → Malicious DLL File
  • %All Users Profile%\fontFiles\{Random Characters}.tmp
  • %All Users Profile%\fontFiles\rekeywiz.exe.config
  • %All Users Profile%\fontFiles\font
  • %Application Data%\fontDat\{Random Characters}.sif → contains Admin Priviledges, System Information, List of Directories, Drive Information and Installed Applications to be sent to the C2.
  • %Application Data%\fontDat\{Random Characters}.flc → contains the list of files on the computer
  • %Application Data%\fontDat\{Random Characters}.fls → List of selected files from %Application Data%\fontDat\{Random Characters}.flc to be sent to the C2.

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It creates the following folders:

  • %All Users Profile%\fontFiles
  • %Application Data%\fontDat

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It injects codes into the following process(es):

  • rekeywiz.exe

Autostart Technique

This Trojan Spy adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
font = %All Users Profile%\fontFiles\rekeywiz.exe

Information Theft

This Trojan Spy gathers the following data:

  • Admin Privileges
  • List of Directories
  • Drive Information
    • Drive name
    • Drive Type
    • Drive Format
    • Volume name
    • Total number of bytes available
    • Total number of bytes
  • Installed Applications
  • Computer Files
  • System Information
    • User Account
    • User Name
    • Computer Name
    • Total Physical Memory
    • Antivirus Products
    • AntiSpyware Products
    • Running Processes
      • Name
      • CommandLine
      • Process Owner
    • Processor Information
    • OS Version
    • Network Information
      • MAC Address
      • IP Address
      • Gateway Address

Stolen Information

This Trojan Spy sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}apt.net:443
  • http://{BLOCKED}apt.net/202/dThgupX0fsAhso9R53e1lpuRzJYaPdddZMRgZ8Nb/16364/11542/40598dd0
  • {BLOCKED}.{BLOCKED}.19.96

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.792.02

FIRST VSAPI PATTERN DATE:

07 Apr 2020

VSAPI OPR PATTERN File:

15.793.00

VSAPI OPR PATTERN Date:

08 Apr 2020

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 TrojanSpy.JS.NEMUCOD.BONINGI

[ 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

Delete this registry value

[ 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.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • font = %All Users Profile%\fontFiles\rekeywiz.exe

Step 5

Search and delete these files

[ Learn More ]
There may be some component 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.
  • %All Users Profile%\fontFiles\rekeywiz.exe
  • %All Users Profile%\fontFiles\Duser.dll - Malicious DLL File
  • %All Users Profile%\fontFiles\{Random Characters}.tmp
  • %All Users Profile%\fontFiles\rekeywiz.exe.config
  • %All Users Profile%\fontFiles\font
  • %Application Data%\fontDat\{Random Characters}.sif
  • %Application Data%\fontDat\{Random Characters}.flc
  • %Application Data%\fontDat\{Random Characters}.fls

Step 6

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %All Users Profile%\fontFiles
  • %Application Data%\fontDat

Step 7

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.JS.NEMUCOD.BONINGI. 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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