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Trojan.O97M.MALNOTE.SMYXDCPZ

May 16, 2023
 Analysis by: Melvin Jhun Palbusa
 ALIASES:

HEUR:Trojan.Script.Generic (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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.

  TECHNICAL DETAILS

File Size:

134,140 bytes

File Type:

Other

Memory Resident:

No

Initial Samples Received Date:

15 May 2023

Payload:

Drops files

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:

  • %ProgramData%\MICROSOFT\OFFICE\DATA\opa12.dat
  • %User Startup%\OneNote 2007 Screen CLippier and Launcher.lnk
  • %User Startup%\MICROSOFT\OneNote\12.0\OneNoteOfflineCache.onecache
  • %User Temp%\OneNote_MigrationLog.txt
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\OneNote Table Of Contents.onetoc2
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Travel.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Meeting notes.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Miscellaneous.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Planning.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\ProjectA.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\ProjectB.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Research.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Unfiled Notes.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\OneNote Table Of Contents.onetoc2
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Books, movies, and music.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Miscellaneous.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Shopping.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Personal information.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Recipes.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\To do.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Travel.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\OneNote 2007 Guide\OneNote Table Of Contents.onetoc2
  • %User Profile%\DOCUMENTS\OneNote Notebooks\OneNote 2007 Guide\Getting Started with OneNote.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\OneNote 2007 Guide\More Cool Features.one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Preferences.dat
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Unfiled Notes\Unfiled Notes.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Onenote 2007 Guide\More Cool Features.one. [Date].one
  • %Application Data%\MICROSOFT\UProof\CUSTOM.DIC
  • %Application Data%\MICROSOFT\UProof\ExcludeDictionaryEN0409.lex
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Onenote 2007 Guide\Getting Started with OneNote.one. [Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Miscellaneous.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\To do.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Recipes.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Travel.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Books, movies, and music.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Shopping.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Personal Information.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Miscellaneous.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Planning.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Travel.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Research.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\ProjectB.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\ProjectA.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Meeting notes.one.[Date].one

(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.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows 2003(32-bit), XP and 2000(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit), 10(64-bit).. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local 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).)

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.332.03

FIRST VSAPI PATTERN DATE:

21 Mar 2023

VSAPI OPR PATTERN File:

18.333.00

VSAPI OPR PATTERN Date:

22 Mar 2023

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

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%\MICROSOFT\OFFICE\DATA\opa12.dat
  • %User Startup%\OneNote 2007 Screen CLippier and Launcher.lnk
  • %User Startup%\MICROSOFT\OneNote\12.0\OneNoteOfflineCache.onecache
  • %User Temp%\OneNote_MigrationLog.txt
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\OneNote Table Of Contents.onetoc2
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Travel.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Meeting notes.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Miscellaneous.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Planning.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\ProjectA.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\ProjectB.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Work Notebook\Research.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Unfiled Notes.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\OneNote Table Of Contents.onetoc2
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Books, movies, and music.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Miscellaneous.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Shopping.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Personal information.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Recipes.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\To do.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\Personal Notebook\Travel.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\OneNote 2007 Guide\OneNote Table Of Contents.onetoc2
  • %User Profile%\DOCUMENTS\OneNote Notebooks\OneNote 2007 Guide\Getting Started with OneNote.one
  • %User Profile%\DOCUMENTS\OneNote Notebooks\OneNote 2007 Guide\More Cool Features.one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Preferences.dat
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Unfiled Notes\Unfiled Notes.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Onenote 2007 Guide\More Cool Features.one. [Date].one
  • %Application Data%\MICROSOFT\UProof\CUSTOM.DIC
  • %Application Data%\MICROSOFT\UProof\ExcludeDictionaryEN0409.lex
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Onenote 2007 Guide\Getting Started with OneNote.one. [Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Miscellaneous.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\To do.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Recipes.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Travel.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Books, movies, and music.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Shopping.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Personal Information.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Miscellaneous.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Planning.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Travel.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Research.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\ProjectB.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\ProjectA.one.[Date].one
  • %AppDataLocal%\Roaming\MICROSOFT\OneNote\12.0\Backup\Personal Notebooks\Meeting notes.one.[Date].one

Step 4

Scan your computer with your Trend Micro product to delete files detected as Trojan.O97M.MALNOTE.SMYXDCPZ. 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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