What is VirTool:MSIL/Subti.R!bit infection?

In this short article you will discover concerning the meaning of VirTool:MSIL/Subti.R!bit and also its adverse impact on your computer system. Such ransomware are a type of malware that is specified by on the internet frauds to demand paying the ransom money by a target.

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In the majority of the situations, VirTool:MSIL/Subti.R!bit infection will instruct its sufferers to launch funds move for the purpose of counteracting the changes that the Trojan infection has presented to the victim’s device.

VirTool:MSIL/Subti.R!bit Summary

These adjustments can be as complies with:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • A process attempted to delay the analysis task.;
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Detects Sandboxie through the presence of a library;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Steals private information from local Internet browsers;
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Creates a copy of itself;
  • Harvests information related to installed instant messenger clients;
  • Harvests information related to installed mail clients;
  • Attempts to create or modify system certificates;
  • Ciphering the records located on the victim’s hard disk drive — so the sufferer can no more make use of the data;
  • Preventing normal access to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


The most typical networks whereby VirTool:MSIL/Subti.R!bit Ransomware Trojans are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of user ending up on a resource that holds a destructive software program;

As quickly as the Trojan is effectively infused, it will either cipher the information on the victim’s PC or avoid the tool from working in an appropriate fashion – while also putting a ransom money note that discusses the need for the victims to impact the payment for the function of decrypting the files or restoring the documents system back to the initial condition. In the majority of instances, the ransom note will come up when the client reboots the PC after the system has already been damaged.

VirTool:MSIL/Subti.R!bit circulation networks.

In different corners of the globe, VirTool:MSIL/Subti.R!bit expands by jumps as well as bounds. Nonetheless, the ransom money notes and techniques of obtaining the ransom money quantity may differ depending upon specific local (local) setups. The ransom notes and also methods of obtaining the ransom amount might vary depending on specific local (local) setups.

Ransomware injection

As an example:

    Faulty informs concerning unlicensed software.

    In particular locations, the Trojans frequently wrongfully report having actually detected some unlicensed applications allowed on the sufferer’s tool. The alert then requires the individual to pay the ransom money.

    Faulty statements about illegal web content.

    In countries where software application piracy is much less prominent, this approach is not as effective for the cyber scams. Conversely, the VirTool:MSIL/Subti.R!bit popup alert might wrongly declare to be originating from a law enforcement institution and will certainly report having located youngster pornography or various other illegal data on the gadget.

    VirTool:MSIL/Subti.R!bit popup alert may incorrectly claim to be deriving from a regulation enforcement organization as well as will certainly report having situated kid pornography or various other prohibited data on the device. The alert will likewise have a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: C9FF837F
md5: 4735c415cc3917f1dda0efa2b1f457b2
name: 4735C415CC3917F1DDA0EFA2B1F457B2.mlw
sha1: 96d56dc7537acc48412aa66a4ba050f3f5fd64cb
sha256: 6572b70177b6f01fb07c00454351ef51a02ac48704386d237e07a4bfb90b86bf
sha512: f95b194bb88762e5c4882a7d80099584713894b7fdc6f7b2fff0ff960d3d019531b2c9d800e7c15f4edbb57760c7feafa1150ca3371c792afe4fc2b73b635053
ssdeep: 6144:R7lGztGL/bi27oUZInJ2EVsTqNRynLfL3Lafs2/o8SdGOOFw1Yi:HGZGT5om9OKLbdS9WG7Ffi
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 Zero-Byte 2017
Assembly Version:
InternalName: qsw.exe
CompanyName: Zero-Byte
LegalTrademarks: Zero-Byte
Comments: Zero-Byte
ProductName: Zero-Byte
FileDescription: Zero-Byte
OriginalFilename: qsw.exe

VirTool:MSIL/Subti.R!bit also known as:

GridinSoft Trojan.Ransom.Gen
DrWeb Trojan.PWS.Siggen2.218
Cynet Malicious (score: 100)
ALYac Trojan.GenericKD.5778871
Cylance Unsafe
Zillya Trojan.Agent.Win32.816634
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (D)
Alibaba Ransom:MSIL/Blocker.7c132707
K7GW Trojan ( 700000121 )
K7AntiVirus Trojan ( 700000121 )
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.kfej
BitDefender Trojan.GenericKD.5778871
NANO-Antivirus Trojan.Win32.Agent.erqwmb
SUPERAntiSpyware Trojan.Agent/Gen-Dropper
MicroWorld-eScan Trojan.GenericKD.5778871
Tencent Win32.Trojan.Blocker.Pbpd
Ad-Aware Trojan.GenericKD.5778871
Sophos Mal/Generic-S
Comodo Malware@#ku8jur6vskk
F-Secure Trojan.TR/ATRAPS.Gen
BitDefenderTheta Gen:NN.ZemsilF.34608.zm0@a8mdEWf
VIPRE Nirsoft Password Recovery (not malicious)
McAfee-GW-Edition BehavesLike.Win32.Generic.gc
Emsisoft Trojan.GenericKD.5778871 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Blocker.rso
Webroot W32.Trojan.GenKD
eGambit Unsafe.AI_Score_100%
Antiy-AVL Trojan/Win32.TSGeneric
Microsoft VirTool:MSIL/Subti.R!bit
Arcabit Trojan.Generic.D582DB7
AegisLab Trojan.Win32.Blocker.j!c
ZoneAlarm Trojan-Ransom.Win32.Blocker.kfej
GData Trojan.GenericKD.5778871
AhnLab-V3 Malware/Win32.Generic.C995529
McAfee Artemis!4735C415CC39
MAX malware (ai score=99)
Malwarebytes MachineLearning/Anomalous.95%
Panda Trj/GdSda.A
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.Blocker!zQQm8Q3jKbo
Ikarus Trojan.MSIL.PSW
Fortinet MSIL/Generic.AP.125192!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Ransom.Blocker.HgIASOkA

How to remove VirTool:MSIL/Subti.R!bit ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for VirTool:MSIL/Subti.R!bit files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

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If the guide doesn’t help you to remove VirTool:MSIL/Subti.R!bit you can always ask me in the comments for getting help.

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About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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