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Worm.MSIL.VOTCHSYS.A

April 26, 2019
 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Worm 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:

1,254,400 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

26 Apr 2019

Arrival Details

This Worm 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 Worm drops the following copies of itself into the affected system:

  • %program files%\{malware file name}.exe
  • %system root%\users\{malware file name}.exe
  • %system root%\python27\{malware file name}.exe
  • d:\{malware file name}.exe
  • d:\$recycle.bin\{malware file name}.exe
  • %system root%\{malware file name}.exe
  • %windows%\{malware file name}.exe
  • f:\{malware file name}.exe
  • %system root%\perflogs\{malware file name}.exe
  • d:\shared\{malware file name}.exe
  • %system root%\recovery\{malware file name}.exe
  • %system root%\$recycle.bin\{malware file name}.exe
  • %all users profile%\{malware file name}.exe
  • %system root%\documents and settings\{malware file name}.exe
  • %system root%\perl\{malware file name}.exe

It adds the following processes:

  • %User Temp%\acrord32_sbx
  • %user startup%\{malware file name}.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)

Dropping Routine

This Worm drops the following files:

  • %user startup%\{malware file name}.exe.config
  • d:\system volume information\{malware file name}.exe
  • %system root%\system volume information\{malware file name}.exe
  • %user startup%\{malware file name}.exe

Other Details

This Worm connects to the following possibly malicious URL:

  • http://mrh.{BLOCKED}e.com/getorder.php
  • http://www.{BLOCKED}host.com

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

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

Identify and terminate files detected as Worm.MSIL.VOTCHSYS.A

[ 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 3

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %user startup%\{malware file name}.exe.config
  • d:\system volume information\{malware file name}.exe
  • %system root%\system volume information\{malware file name}.exe
  • %user startup%\{malware file name}.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as Worm.MSIL.VOTCHSYS.A. 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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