What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is VirTool:MSIL/CryptInject infection?

In this article you will certainly find about the interpretation of VirTool:MSIL/CryptInject and also its unfavorable effect on your computer system. Such ransomware are a form of malware that is clarified by online fraudulences to require paying the ransom money by a target.

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Most of the situations, VirTool:MSIL/CryptInject virus will instruct its victims to start funds transfer for the objective of reducing the effects of the changes that the Trojan infection has actually introduced to the target’s gadget.

VirTool:MSIL/CryptInject Summary

These alterations can be as complies with:

  • Presents an Authenticode digital signature;
  • 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.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • Tries to suspend Cuckoo threads to prevent logging of malicious activity;
  • Attempts to delete volume shadow copies;
  • Attempts to stop active services;
  • Tries to unhook or modify Windows functions monitored by Cuckoo;
  • 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!
  • Modifies boot configuration settings;
  • 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
  • Writes a potential ransom message to disk;
  • 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.
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the documents located on the target’s hard disk drive — so the sufferer can no more make use of the information;
  • Preventing regular accessibility to the sufferer’s workstation;
Similar behavior
Related domains Trojan.Ransom.RagnarLocker Trojan.Ransom.RagnarLocker


One of the most normal networks where VirTool:MSIL/CryptInject Ransomware Trojans are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of individual ending up on a source that hosts a destructive software application;

As quickly as the Trojan is successfully infused, it will certainly either cipher the information on the victim’s PC or stop the tool from functioning in a correct way – while likewise placing a ransom note that states the demand for the sufferers to impact the settlement for the purpose of decrypting the files or recovering the documents system back to the preliminary condition. In many circumstances, the ransom money note will show up when the client restarts the PC after the system has actually already been harmed.

VirTool:MSIL/CryptInject circulation channels.

In different edges of the world, VirTool:MSIL/CryptInject expands by leaps and also bounds. Nonetheless, the ransom notes and also tricks of obtaining the ransom money amount might vary depending upon certain regional (local) setups. The ransom notes and also methods of extorting the ransom amount might vary depending on certain regional (local) setups.

Ransomware injection

For example:

    Faulty alerts regarding unlicensed software.

    In particular locations, the Trojans usually wrongfully report having actually identified some unlicensed applications made it possible for on the victim’s gadget. The sharp then demands the user to pay the ransom money.

    Faulty declarations about prohibited content.

    In nations where software program piracy is much less popular, this approach is not as effective for the cyber scams. Alternatively, the VirTool:MSIL/CryptInject popup alert might incorrectly claim to be originating from a law enforcement establishment as well as will report having located youngster porn or various other illegal data on the tool.

    VirTool:MSIL/CryptInject popup alert may wrongly declare to be deriving from a law enforcement institution and also will certainly report having located kid pornography or various other unlawful information on the gadget. The alert will likewise include a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: C41196C7
md5: 1874b6394a6060c34dae60305f48a0b3
name: 1874B6394A6060C34DAE60305F48A0B3.mlw
sha1: 6f559fd57304197443b71d8bf553cce3c9de8d53
sha256: 9416e5a57e6de00c685560fa9fee761126569d123f62060792bf2049ebba4151
sha512: eff6e29ca32d96388832bdffb5356b8a72b91b4672958ff3e2c9995ce0f45ce4d0858d9b4666e3870ae862fff62a84c67f35cf301f793bef7daf6b7f4a64200b
ssdeep: 98304:SEgVXO792sKQ/sIjF9VpI2zAJRs1YQXI25z4pbayNQ3Wo6whk9SYZzKLg+5G:+ZcVjV02zyRs1TjcJxkWTwhXYZzGP5G
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

VirTool:MSIL/CryptInject also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.GenericKD.35091832
CAT-QuickHeal Trojan.Multi
Qihoo-360 Generic/HEUR/QVM19.1.0E00.Malware.Gen
ALYac Trojan.Ransom.RagnarLocker
Malwarebytes Ransom.Ragnar
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Cryptor.j!c
Sangfor Malware
K7AntiVirus Trojan ( 0056475b1 )
BitDefender Trojan.GenericKD.35091832
K7GW Trojan ( 0056475b1 )
CrowdStrike win/malicious_confidence_100% (W)
Arcabit Trojan.Generic.D2177578
Cyren W32/Trojan.XNHA-1015
Symantec Downloader
APEX Malicious
Kaspersky Trojan-Ransom.Win32.Cryptor.dsd
Alibaba Ransom:Win32/Cryptor.10e42615
NANO-Antivirus Trojan.Win32.Cryptor.ibeepx
Rising [email protected] (RDMK:5botpVmwaX/tJ6R9NqQlTw)
Ad-Aware Trojan.GenericKD.35091832
Emsisoft MalCert-S.DF (A)
Comodo Malware@#3ncy4dgeqgku9
F-Secure Trojan.TR/Ransom.RagnarLocker.nphvp
DrWeb Trojan.Encoder.32995
Zillya Trojan.Cryptor.Win32.554
TrendMicro Ransom.Win32.RAGNARLOCKER.CRL
McAfee-GW-Edition RANSOM/Ragnar.a
Sophos Mal/Generic-S
Ikarus Trojan-Ransom.Ragnarlocker
Avira TR/Ransom.RagnarLocker.nphvp
Gridinsoft Trojan.Heur!.01294021
Microsoft VirTool:MSIL/CryptInject
ZoneAlarm Trojan-Ransom.Win32.Cryptor.dsd
GData Trojan.GenericKD.35091832
Cynet Malicious (score: 90)
AhnLab-V3 Trojan/Win32.RagnarLocker.R355456
McAfee Artemis!1874B6394A60
MAX malware (ai score=100)
VBA32 TScope.Malware-Cryptor.SB
Cylance Unsafe
Panda Trj/CI.A
ESET-NOD32 Win32/Filecoder.RagnarLocker.A
TrendMicro-HouseCall Ransom.Win32.RAGNARLOCKER.CRL
SentinelOne Static AI – Suspicious PE
Fortinet W32/Cryptor.A!tr.ransom
AVG Win32:DangerousSig [Trj]
Avast Win32:DangerousSig [Trj]
MaxSecure Trojan.Malware.109381855.susgen

How to remove VirTool:MSIL/CryptInject virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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 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/CryptInject 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

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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