What is Ransom:MSIL/FileCryptor.B!MTB infection?

In this short article you will find regarding the interpretation of Ransom:MSIL/FileCryptor.B!MTB as well as its adverse impact on your computer. Such ransomware are a form of malware that is clarified by online frauds to demand paying the ransom money by a target.

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Most of the cases, Ransom:MSIL/FileCryptor.B!MTB ransomware will instruct its sufferers to start funds move for the purpose of reducing the effects of the modifications that the Trojan infection has presented to the victim’s tool.

Ransom:MSIL/FileCryptor.B!MTB Summary

These adjustments can be as adheres to:

  • Ciphering the records located on the target’s hard disk drive — so the victim can no more use the information;
  • Preventing regular access to the sufferer’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 regular channels whereby Ransom:MSIL/FileCryptor.B!MTB Ransomware are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of customer ending up on a source that hosts a malicious software;

As soon as the Trojan is efficiently infused, it will either cipher the information on the target’s PC or protect against the gadget from operating in an appropriate manner – while likewise positioning a ransom money note that mentions the demand for the targets to impact the payment for the function of decrypting the files or restoring the file system back to the first problem. In a lot of instances, the ransom money note will turn up when the client restarts the COMPUTER after the system has currently been harmed.

Ransom:MSIL/FileCryptor.B!MTB distribution channels.

In various edges of the world, Ransom:MSIL/FileCryptor.B!MTB grows by jumps as well as bounds. Nevertheless, the ransom notes and also methods of extorting the ransom amount might vary depending upon particular regional (regional) setups. The ransom money notes and tricks of obtaining the ransom amount might differ depending on particular local (regional) setups.

Ransomware injection

For example:

    Faulty informs about unlicensed software application.

    In certain locations, the Trojans often wrongfully report having found some unlicensed applications allowed on the target’s device. The alert then demands the customer to pay the ransom.

    Faulty statements regarding unlawful content.

    In nations where software application piracy is less prominent, this method is not as effective for the cyber fraudulences. Alternatively, the Ransom:MSIL/FileCryptor.B!MTB popup alert may falsely declare to be stemming from a law enforcement organization and will report having located kid porn or various other prohibited data on the device.

    Ransom:MSIL/FileCryptor.B!MTB popup alert may wrongly assert to be deriving from a law enforcement organization and will certainly report having situated child pornography or various other unlawful information on the device. The alert will in a similar way include a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: F1F79926
md5: 9a6aa1f9abc8bff81d6be600636b445d
name: 9A6AA1F9ABC8BFF81D6BE600636B445D.mlw
sha1: d52cc4d3ea29a5a34fbe4c7afbff83765a4db3fd
sha256: 39811d2e1a62564b80670c43315eeaab5ba9ae7dadeeb05ebadc9e0fc470939c
sha512: 273066681716d9af92aa0ddecd32def1fe7e146dab910966a444e72ce2346d6664eb2d7ea48783b52dd0242d3d67edb4fcce6d894170a7867b2be84b2cc87f94
ssdeep: 3072:254KqOhcIVib0MVSno3C3lK2lKoo95IB:lOR4bjQzs2to9G
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2019
Assembly Version:
InternalName: Bytelocker.exe
ProductName: Bytelocker
FileDescription: Bytelocker
OriginalFilename: Bytelocker.exe

Ransom:MSIL/FileCryptor.B!MTB also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 005604741 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.33375
Cynet Malicious (score: 85)
ALYac Trojan.Ransom.HiddenTear
Cylance Unsafe
Zillya Trojan.Filecoder.Win32.17609
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:MSIL/FileCryptor.436571b1
K7GW Trojan ( 005604741 )
Cybereason malicious.9abc8b
Cyren W32/Ransom.OKKG-0966
ESET-NOD32 a variant of MSIL/Filecoder.XL
APEX Malicious
Avast Win32:MalwareX-gen [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Heur.Ransom.HiddenTears.1
MicroWorld-eScan Gen:Heur.Ransom.HiddenTears.1
Tencent Win32.Trojan.Generic.Hupm
Ad-Aware Gen:Heur.Ransom.HiddenTears.1
Sophos Mal/Generic-S
BitDefenderTheta Gen:NN.ZemsilF.34608.nm0@a0L75Gi
McAfee-GW-Edition Artemis!Trojan
FireEye Gen:Heur.Ransom.HiddenTears.1
Emsisoft Trojan.FileCoder (A)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1130184
Microsoft Ransom:MSIL/FileCryptor.B!MTB
Arcabit Trojan.Ransom.HiddenTears.1
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData MSIL.Trojan-Ransom.Unlucky.A
TACHYON Ransom/W32.DN-ByteLocker.223744
AhnLab-V3 Trojan/Win32.RL_Generic.C4260507
McAfee Artemis!9A6AA1F9ABC8
MAX malware (ai score=100)
VBA32 TScope.Trojan.MSIL
Malwarebytes Ransom.ByteLocker
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom.MSIL.BYTELOCKER.SM
Rising Ransom.HiddenTear!8.DC9E (CLOUD)
Ikarus Trojan-Ransom.FileCrypter
MaxSecure Trojan.Malware.7164915.susgen
Fortinet MSIL/Filecoder.TA!tr
AVG Win32:MalwareX-gen [Trj]
Qihoo-360 Win32/Ransom.Generic.HgIASQMA

How to remove Ransom:MSIL/FileCryptor.B!MTB virus?

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 Ransom:MSIL/FileCryptor.B!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 Ransom:MSIL/FileCryptor.B!MTB you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

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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