.SYS Files Ransom Virus – How to Remove It

.SYS Files Ransom Virus – How to Remove It

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This article has been created in order to help explain what is the .SYS files virus and how you can remove it from your PC completely.

Yet another ransomware virus has been detected in the wild, using the .SYS file extension. The ransomware aims to encrypt the files on the computers, compromised by it and then leave behind the .SYS extension. The ransomware also leaves behind the _HELP_INSTRUCTION.TXT file which is the extortion note, asking victims to pay ransom in order to get their files back. If your computer has been infected by the .SYS ransomware, we recommend that you read this article thoroughly.

Threat Summary

Name.SYS Files Virus
TypeRansomware, Cryptovirus
Short DescriptionAims to encrypt the files on the compromised computers by it and then extort the owners to pay ransom to get them back.
SymptomsFiles are encrypted and have the .SYS file extension. The virus also leaves the “_HELP_INSTRUCTION.TXT” ransom note.
Distribution MethodSpam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by .SYS Files Virus


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .SYS Files Virus.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

.SYS File Ransomware Distribution Methods

The main methods of propagation used by this ransomware are believed to be conducted via malicious e-mail attachments and they may be spread posing as different seemingly legitimate type of files, like:

  • Invoices.
  • Receipts
  • Online order confirmations.
  • Banking documents.

In addition to this, the ransomware message may also pose as if it is coming from a big company, such as PayPal, Amazon, eBay or a bank, the victim may have an account in.

In addition ot this, the .SYS files virus may be spread by having it’s malicious files to be uploaded on websites, where the virus may pose as:

  • Crack.
  • Patch.
  • Activator.
  • Portable program.
  • Setup of software or a game.

.SYS Files Virus – Activity

Once an infection by the .SYS file ransomware has already taken place, the malware may drop its files in the following Windows directories:

  • %AppData%
  • %Local%
  • %LocalLow%
  • %Roaming%
  • %Temp%

In addition to this, the ransomware virus may also drop it’s ransom note file and auto open it. The ransom note is called _HELP_INSTRUCTION.TXT and has the following contents:

Attention! All Your data was encrypted!
For specific information, please send us an email with Your ID number:
{emails list}
Please send email to all email addresses ! We will help You as soon as possible!

Furthermore, this ransomware virus may also attack the following Windows Registry sub-keys:

→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce

In addition to those activities, .SYS ransomware virus may also take actions towards deleting the shadow volume copies of the computers affected by it:

→ sc stop VVS
sc stop wscsvc
sc stop WinDefend
sc stop wuauserv
sc stop BITS
sc stop ERSvc
sc stop WerSvc
cmd.exe /C bcdedit /set {default} recoveryenabled No
cmd.exe /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
C:\Windows\System32\cmd.exe” /C vssadmin.exe Delete Shadows /All /Quiet

.SYS Files Virus – Encryption Process

The encryption activity of the .SYS file ransomware begins with the virus scanning your most often used files to encrypt them. The .SYS ransomware may encrypt all files that have the following file extensions:


The .SYS virus may not encrypt files that are located in the system folders of Windows. The encryption process of this ransomware is condcuted with the virus deleting the original versions of the files and then creating an encrypted copy of the deleted file. The end result is the files looking like the image below shows:

Remove .SYS File Ransomware and Try to Restore Encrypted Files

If you want to remove this ransomware virus from your computer, we would advise you to follow the removal instructions that are underneath this article. They have been created with the main goal of assisting you through the removal. If the manual removal methods do not work, we strongly suggest that you go through with the automatic removal manual and download an advanced anti-malware program as this software will effectively help you remove the .SYS files virus by scanning for all the malicious objects related to it.

Furhtermore, if you want to try and recover files, encrypted by the .SYS file ransomware, you can try using the alternative methods underneath. They may not be 100% guarantee to be able to recover all your files, but with their aid, you could recover at least some data.

Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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