Analysis by: Maria Emreen Viray
ALIASES:

Worm:Win32/AutoRun!atmn (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Virus

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Virus 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

Tamaño del archivo 771,584 bytes
Tipo de archivo EXE
Residente en memoria No
Fecha de recepción de las muestras iniciales 11 Sep 2021

Arrival Details

This Virus arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This Virus adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Synaptics Pointing Device Driver = %ProgramData%\Synaptics\Synaptics.exe

Dropping Routine

This Virus drops the following files:

  • %ProgramData%\Synaptics
  • %User Temp%\{random characters}.ini

(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 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).)

Other Details

This Virus connects to the following possibly malicious URL:

  • http://freedns.{BLOCKED}d.org/api/?action=getdyndns&sha=a30fa98efc092684e8d1c5cff797bcc613562978
  • https://docs.{BLOCKED}e.com/uc?id=0BxsMXGfPIZfSVlVsOGlEVGxuZVk&export=download

It does the following:

  • infects exe files located in desktop

  SOLUTION

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 16.960.05
Primera fecha de publicación de patrones de VSAPI 11 Sep 2021
Versión de patrones OPR de VSAPI 16.961.00
Fecha de publicación de patrones OPR de VSAPI 12 Sep 2021

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:

     
    • Ransom.Win32.TRX.XXPE50FFF048

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 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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Synaptics Pointing Device Driver = %ProgramData%\Synaptics\Synaptics.exe

Step 5

Search and delete these files

[ 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%\Synaptics
  • %User Temp%\{random characters}.ini

Step 6

Scan your computer with your Trend Micro product to delete files detected as Virus.Win32.NAPWHICH.E. 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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