Written by Robert Bailey

What is VirTool:MSIL/CryptInject.YD!MTB infection?

In this short article you will discover concerning the interpretation of VirTool:MSIL/CryptInject.YD!MTB and its negative influence on your computer. Such ransomware are a type of malware that is elaborated by on the internet scams to demand paying the ransom by a victim.

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In the majority of the situations, VirTool:MSIL/CryptInject.YD!MTB infection will certainly instruct its victims to start funds transfer for the objective of neutralizing the amendments that the Trojan infection has introduced to the sufferer’s device.

VirTool:MSIL/CryptInject.YD!MTB Summary

These alterations can be as adheres to:

  • 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.
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • A process created a hidden window;
  • Uses Windows utilities for basic functionality;
  • Exhibits behavior characteristic of iSpy Keylogger;
  • Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Creates a copy of itself;
  • Ciphering the records situated on the sufferer’s hard drive — so the sufferer can no longer utilize the information;
  • Preventing regular accessibility to the victim’s workstation;


The most typical networks whereby VirTool:MSIL/CryptInject.YD!MTB Trojans are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of individual winding up on a resource that holds a destructive software application;

As soon as the Trojan is efficiently infused, it will either cipher the data on the sufferer’s PC or protect against the gadget from functioning in an appropriate manner – while additionally placing a ransom note that discusses the need for the sufferers to effect the repayment for the objective of decrypting the files or recovering the file system back to the first problem. In most instances, the ransom note will certainly turn up when the customer restarts the COMPUTER after the system has already been damaged.

VirTool:MSIL/CryptInject.YD!MTB circulation channels.

In various corners of the globe, VirTool:MSIL/CryptInject.YD!MTB expands by jumps and bounds. However, the ransom notes and tricks of extorting the ransom money amount may differ depending upon specific regional (local) settings. The ransom money notes and tricks of obtaining the ransom money quantity may differ depending on specific regional (local) setups.

Ransomware injection

As an example:

    Faulty alerts concerning unlicensed software application.

    In particular areas, the Trojans often wrongfully report having actually discovered some unlicensed applications allowed on the victim’s device. The alert then demands the user to pay the ransom.

    Faulty declarations regarding illegal web content.

    In nations where software piracy is less prominent, this technique is not as effective for the cyber frauds. Additionally, the VirTool:MSIL/CryptInject.YD!MTB popup alert might incorrectly assert to be originating from a law enforcement establishment and also will report having located kid porn or other prohibited data on the device.

    VirTool:MSIL/CryptInject.YD!MTB popup alert may falsely claim to be deriving from a legislation enforcement institution and will certainly report having situated child porn or other unlawful information on the device. The alert will similarly have a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 312E39EB
md5: 1264dfb13acf57075e5fad44ba1699e8
name: 1264DFB13ACF57075E5FAD44BA1699E8.mlw
sha1: 0e4690d76e399584b199461dcdaec56a9c5bad60
sha256: 9575550c33e7a80fe1754f3f57673e2d554dc912e0fb7e47af5e166ed4df95b2
sha512: 3b175dd1ea004abc3e909a801f66458e648d94c800e3cbd92114c7c8d4a07ad584ad81ea1120bdb02b03fa91e05206d4d011f7b03e6c9a7f207c0b94bfc48541
ssdeep: 6144:QZruGzLn6AZLMvxNbUcJdZMteqRyZkOO6:Puj6yL8zJdk
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

0: [No Data]

VirTool:MSIL/CryptInject.YD!MTB also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop8.28808
ClamAV Win.Packed.Razy-6849099-0
ALYac Gen:Variant.Ransom.689
Cylance Unsafe
Zillya Trojan.Blocker.Win32.40054
CrowdStrike win/malicious_confidence_100% (D)
BitDefender Gen:Variant.Ransom.689
K7GW Trojan ( 0052a44b1 )
K7AntiVirus Trojan ( 0052a44b1 )
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/TrojanDropper.Agent.EEB
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky Trojan-Ransom.Win32.Blocker.dvjn
NANO-Antivirus Trojan.Win32.Blocker.fesnqv
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
MicroWorld-eScan Gen:Variant.Ransom.689
Tencent Win32.Trojan.Blocker.Dvzo
Ad-Aware Gen:Variant.Ransom.689
Sophos ML/PE-A + Mal/MSIL-TC
BitDefenderTheta Gen:NN.ZemsilF.34684.nqX@audH!0h
TrendMicro Backdoor.MSIL.ASDROP.SMZSM
McAfee-GW-Edition BehavesLike.Win32.Trojan.dh
Emsisoft Gen:Variant.Ransom.689 (B)
Avira TR/Dropper.Gen
eGambit Unsafe.AI_Score_100%
Microsoft VirTool:MSIL/CryptInject.YD!MTB
AegisLab Trojan.Win32.Blocker.j!c
GData Gen:Variant.Ransom.689
AhnLab-V3 Trojan/Win32.RL_Generic.C4338928
McAfee Packed-XI!1264DFB13ACF
MAX malware (ai score=96)
Malwarebytes Spyware.PasswordStealer.MSIL.Generic
TrendMicro-HouseCall Backdoor.MSIL.ASDROP.SMZSM
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.Blocker!PntRF/IrxI0
SentinelOne Static AI – Malicious PE
Fortinet MSIL/Kryptik.SHS!tr
Panda Trj/GdSda.A

How to remove VirTool:MSIL/CryptInject.YD!MTB 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/CryptInject.YD!MTB 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

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

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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