VirTool:MSIL/Defdiz.A!MTB Virus Removal

Spectating the VirTool:MSIL/Defdiz.A!MTB detection means that your computer is in big danger. This virus can correctly be named as ransomware – sort of malware which encrypts your files and asks you to pay for their decryption. Removing it requires some peculiar steps that must be done as soon as possible.

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VirTool:MSIL/Defdiz.A!MTB detection is a virus detection you can spectate in your system. It generally shows up after the preliminary activities on your computer – opening the suspicious e-mail, clicking the banner in the Web or setting up the program from dubious resources. From the moment it shows up, you have a short time to take action until it begins its harmful activity. And be sure – it is better not to wait for these harmful effects.

What is VirTool:MSIL/Defdiz.A!MTB virus?

VirTool:MSIL/Defdiz.A!MTB is ransomware-type malware. It looks for the files on your disk drive, encrypts it, and after that asks you to pay the ransom for receiving the decryption key. Besides making your files inaccessible, this malware also does a lot of harm to your system. It alters the networking settings in order to avoid you from looking for the removal articles or downloading the antivirus. Sometimes, VirTool:MSIL/Defdiz.A!MTB can also block the setup of anti-malware programs.

VirTool:MSIL/Defdiz.A!MTB Summary

Summarizingly, VirTool:MSIL/Defdiz.A!MTB malware actions in the infected computer are next:

  • Authenticode signature is invalid;
  • CAPE detected the BlackNET malware family;
  • Binary file triggered YARA rule;
  • Encrypting the files located on the victim’s disk drives — so the victim cannot use these files;
  • Blocking the launching of .exe files of anti-malware programs
  • Blocking the launching of installation files of anti-malware programs

Ransomware has actually been a horror story for the last 4 years. It is hard to imagine a more hazardous malware for both individuals and companies. The algorithms utilized in VirTool:MSIL/Defdiz.A!MTB (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have a lot more time than our galaxy actually exists, and possibly will exist. But that malware does not do all these bad things instantly – it may take up to several hours to cipher all of your files. Therefore, seeing the VirTool:MSIL/Defdiz.A!MTB detection is a clear signal that you should start the removal process.

Where did I get the VirTool:MSIL/Defdiz.A!MTB?

Standard tactics of VirTool:MSIL/Defdiz.A!MTB distribution are basic for all other ransomware variants. Those are one-day landing web pages where victims are offered to download the free software, so-called bait emails and hacktools. Bait emails are a quite new strategy in malware spreading – you get the email that imitates some normal notifications about shippings or bank service conditions updates. Inside of the email, there is a malicious MS Office file, or a link which opens the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Preventing it looks pretty simple, but still demands tons of attention. Malware can hide in various spots, and it is better to stop it even before it gets into your PC than to trust in an anti-malware program. General cybersecurity knowledge is just an important thing in the modern-day world, even if your interaction with a computer stays on YouTube videos. That can save you a lot of money and time which you would certainly spend while trying to find a fixing guide.

VirTool:MSIL/Defdiz.A!MTB malware technical details

File Info:

name: 3917F35AED62A03ADFFB.mlw
path: /opt/CAPEv2/storage/binaries/bf0dae2bf317f6fd26f8815792aa685671842fa9393cef61c394b37ff552595d
crc32: EF05C38E
md5: 3917f35aed62a03adffbe0f22ff0d446
sha1: 7e2b3ffff8220e0b2b603e97343bfafcc7ea1079
sha256: bf0dae2bf317f6fd26f8815792aa685671842fa9393cef61c394b37ff552595d
sha512: 3918e1f4b67f0195cff25a1326431ddf04ee173b50553e6ee4a0072879402388e16c5fcd6d9f2e6117e3b09b90496808776ba1fed5b92c6e69ab808949081911
ssdeep: 3072:OxkNWNo7HCdkVTYB+eztx3be/EKyNFna4FwX5F:sePHd5YB+eztlboZ8wX5
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T16E24F9A1A3995CD4F07D89B85E3F0340FB74A8D6C8D5D76F0B82E05C09F62A3B40669E
sha3_384: af79c041cb4bab960c9edafa84d0c39fa39c23d8b789d2986668a431da7e9983801bf79bd1ebe77785eb89ada84ad856
ep_bytes: ff250020400000000000000000000000
timestamp: 2020-12-10 17:51:43

Version Info:

Translation: 0x0000 0x04b0
Comments: Host Process for Windows Services
CompanyName: Microsoft Corporation
FileDescription: Windows Update Assistant
FileVersion: 10.0.18362.1
InternalName: svchost.exe
LegalCopyright: © Microsoft Corporation. All rights reserved.
OriginalFilename: svchost.exe
ProductName: Microsoft® Windows® Operating System
ProductVersion: 10.0.18362.1
Assembly Version: 10.0.18362.1

VirTool:MSIL/Defdiz.A!MTB also known as:

Bkav W32.AIDetectMalware.CS
Lionic Trojan.Win32.Blacknet.4!c
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Ransom.Loki.22870
CAT-QuickHeal Trojan.YakbeexMSIL.ZZ4
ALYac Gen:Variant.Ransom.Loki.22870
Cylance unsafe
Zillya Worm.Agent.Win32.198903
Sangfor Suspicious.Win32.Save.a
K7AntiVirus Trojan ( 0056a86a1 )
Alibaba Backdoor:MSIL/Blacknet.20babccd
K7GW Trojan ( 0056a86a1 )
Cybereason malicious.aed62a
BitDefenderTheta AI:Packer.03C934081F
VirIT Trojan.Win32.MSIL_Heur.B
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Agent.VC
APEX Malicious
TrendMicro-HouseCall Backdoor.MSIL.BLACKNET.SMDA
Avast Win32:BotX-gen [Trj]
ClamAV Win.Trojan.Razy-9778111-0
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Ransom.Loki.22870
Tencent Trojan.Win32.Bladabindi.16000442
Emsisoft Gen:Variant.Ransom.Loki.22870 (B)
F-Secure Trojan.TR/Spy.Gen
DrWeb Trojan.DownLoader34.7684
VIPRE Gen:Variant.Ransom.Loki.22870
TrendMicro Backdoor.MSIL.BLACKNET.SMDA
Sophos ATK/Blacknet-A
Ikarus Worm.MSIL.Agent
MAX malware (ai score=100)
Jiangmin Trojan.Generic.gnsfr
Google Detected
Avira TR/Spy.Gen
Varist W32/MSIL_Bladabindi.FN.gen!Eldorado
Antiy-AVL Trojan/MSIL.Agent
Kingsoft malware.kb.c.999
Microsoft VirTool:MSIL/Defdiz.A!MTB
Xcitium Malware@#1g3f9gg89rsye
Arcabit Trojan.Ransom.Loki.D5956
ZoneAlarm HEUR:Trojan.Win32.Generic
GData MSIL.Backdoor.BlackNet.B
AhnLab-V3 Trojan/Win32.Wacatac.C4199561
McAfee BackDoor-FEBU!3917F35AED62
VBA32 Backdoor.MSIL.XWorm.gen
Malwarebytes Generic.Malware.AI.DDS
Panda Trj/GdSda.A
Rising Trojan.AntiVM!1.CF63 (CLASSIC)
Yandex Trojan.Agent!juzWhs2gFWQ
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.7164915.susgen
Fortinet MSIL/Agent.VC!tr
AVG Win32:BotX-gen [Trj]
DeepInstinct MALICIOUS
CrowdStrike win/malicious_confidence_100% (W)
alibabacloud Backdoor:MSIL/Bladabindi.E

How to remove VirTool:MSIL/Defdiz.A!MTB?

VirTool:MSIL/Defdiz.A!MTB malware is very hard to remove manually. It puts its data in several locations throughout the disk, and can get back itself from one of the elements. In addition, a number of changes in the registry, networking configurations and Group Policies are quite hard to discover and revert to the original. It is better to make use of a specific program – exactly, an anti-malware program. GridinSoft Anti-Malware will fit the best for virus elimination objectives.

Remove VirTool:MSIL/Defdiz.A!MTB with Gridinsoft Anti-Malware

We have also been using this software on our systems ever since, and it has always been successful in detecting viruses. It has blocked the most common Trojans as shown from our tests with the software, and we assure you that it can remove VirTool:MSIL/Defdiz.A!MTB as well as other malware hiding on your computer.

Gridinsoft Anti-Malware - Main Screen

To use Gridinsoft for remove malicious threats, follow the steps below:

1. Begin by downloading Gridinsoft Anti-Malware, accessible via the blue button below or directly from the official website

2.Once the Gridinsoft setup file (setup-gridinsoft-fix.exe) is downloaded, execute it by clicking on the file.


3.Follow the installation setup wizard's instructions diligently.

Gridinsoft Setup Wizard

4. Access the "Scan Tab" on the application's start screen and launch a comprehensive "Full Scan" to examine your entire computer. This inclusive scan encompasses the memory, startup items, the registry, services, drivers, and all files, ensuring that it detects malware hidden in all possible locations.

Scan for VirTool:MSIL/Defdiz.A!MTB Trojans

Be patient, as the scan duration depends on the number of files and your computer's hardware capabilities. Use this time to relax or attend to other tasks.

5. Upon completion, Anti-Malware will present a detailed report containing all the detected malicious items and threats on your PC.

The VirTool:MSIL/Defdiz.A!MTB was Found

6. Select all the identified items from the report and confidently click the "Clean Now" button. This action will safely remove the malicious files from your computer, transferring them to the secure quarantine zone of the anti-malware program to prevent any further harmful actions.

The VirTool:MSIL/Defdiz.A!MTB has been removed

8. If prompted, restart your computer to finalize the full system scan procedure. This step is crucial to ensure thorough removal of any remaining threats. After the restart, Gridinsoft Anti-Malware will open and display a message confirming the completion of the scan.

Remember Gridinsoft offers a 6-day free trial. This means you can take advantage of the trial period at no cost to experience the full benefits of the software and prevent any future malware infections on your system. Embrace this opportunity to fortify your computer's security without any financial commitment.

Trojan Killer for “VirTool:MSIL/Defdiz.A!MTB” removal on locked PC

In situations where it becomes impossible to download antivirus applications directly onto the infected computer due to malware blocking access to websites, an alternative solution is to utilize the Trojan Killer application.

Trojan Killer - Main View

There is a really little number of security tools that are able to be set up on the USB drives, and antiviruses that can do so in most cases require to obtain quite an expensive license. For this instance, I can recommend you to use another solution of GridinSoft - Trojan Killer Portable. It has a 14-days cost-free trial mode that offers the entire features of the paid version. This term will definitely be 100% enough to wipe malware out.

Trojan Killer is a valuable tool in your cybersecurity arsenal, helping you to effectively remove malware from infected computers. Now, we will walk you through the process of using Trojan Killer from a USB flash drive to scan and remove malware on an infected PC. Remember, always obtain permission to scan and remove malware from a computer that you do not own.

Step 1: Download & Install Trojan Killer on a Clean Computer:

1. Go to the official GridinSoft website ( and download Trojan Killer to a computer that is not infected.

Download Trojan Killer

2. Insert a USB flash drive into this computer.

3. Install Trojan Killer to the "removable drive" following the on-screen instructions.

Install Trojan Killer to Removable Drive

4. Once the installation is complete, launch Trojan Killer.

Step 2: Update Signature Databases:

5. After launching Trojan Killer, ensure that your computer is connected to the Internet.

6. Click "Update" icon to download the latest signature databases, which will ensure the tool can detect the most recent threats.

Click Update Button

Step 3: Scan the Infected PC:

7. Safely eject the USB flash drive from the clean computer.

8. Boot the infected computer to the Safe Mode.

9. Insert the USB flash drive.

10. Run tk.exe

11. Once the program is open, click on "Full Scan" to begin the malware scanning process.

Searching VirTool:MSIL/Defdiz.A!MTB Virus

Step 4: Remove Found Threats:

12. After the scan is complete, Trojan Killer will display a list of detected threats.

Searching VirTool:MSIL/Defdiz.A!MTB Finished

13. Click on "Cure PC!" to remove the identified malware from the infected PC.

14. Follow any additional on-screen prompts to complete the removal process.

Restart needed

Step 5: Restart Your Computer:

15. Once the threats are removed, click on "Restart PC" to reboot your computer.

16. Remove the USB flash drive from the infected computer.

Congratulations on effectively removing VirTool:MSIL/Defdiz.A!MTB and the concealed threats from your computer! You can now have peace of mind, knowing that they won't resurface again. Thanks to Gridinsoft's capabilities and commitment to cybersecurity, your system is now protected.

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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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