Written by Robert Bailey

What is Trojan:MSIL/Bokytuda.B!bit infection?

In this post you will locate regarding the definition of Trojan:MSIL/Bokytuda.B!bit as well as its unfavorable effect on your computer. Such ransomware are a type of malware that is specified by on the internet frauds to require paying the ransom money by a target.

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In the majority of the instances, Trojan:MSIL/Bokytuda.B!bit ransomware will advise its targets to start funds move for the objective of reducing the effects of the changes that the Trojan infection has actually introduced to the victim’s gadget.

Trojan:MSIL/Bokytuda.B!bit Summary

These adjustments can be as follows:

  • 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.;
  • 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;
  • 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.
  • Uses Windows utilities for basic functionality;
  • 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
  • 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.
  • 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.
  • Checks the presence of disk drives in the registry, possibly for anti-virtualization;
  • Creates a copy of itself;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the records found on the target’s hard drive — so the sufferer can no more make use of the data;
  • Preventing routine access to the target’s workstation;

Related domains: Ransom.Blocker!8.12A (TFE:C:bCciLp1QEsN) Ransom.Blocker!8.12A (TFE:C:bCciLp1QEsN)


The most common networks whereby Trojan:MSIL/Bokytuda.B!bit Trojans are infused are:

  • By ways of phishing emails;
  • As a consequence of customer ending up on a resource that organizes a malicious software;

As soon as the Trojan is effectively injected, it will either cipher the data on the victim’s computer or protect against the tool from working in an appropriate manner – while also positioning a ransom note that mentions the demand for the targets to effect the settlement for the function of decrypting the records or recovering the data system back to the first problem. In a lot of circumstances, the ransom money note will turn up when the client restarts the PC after the system has actually currently been damaged.

Trojan:MSIL/Bokytuda.B!bit distribution channels.

In various corners of the world, Trojan:MSIL/Bokytuda.B!bit grows by leaps as well as bounds. Nevertheless, the ransom money notes and methods of extorting the ransom quantity might differ relying on specific neighborhood (regional) setups. The ransom notes as well as methods of obtaining the ransom amount may vary depending on particular neighborhood (regional) setups.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software program.

    In certain locations, the Trojans often wrongfully report having actually discovered some unlicensed applications made it possible for on the sufferer’s device. The alert then demands the customer to pay the ransom.

    Faulty statements regarding unlawful content.

    In nations where software piracy is less popular, this method is not as effective for the cyber scams. Alternatively, the Trojan:MSIL/Bokytuda.B!bit popup alert might falsely declare to be stemming from a law enforcement institution as well as will report having located youngster pornography or various other illegal information on the device.

    Trojan:MSIL/Bokytuda.B!bit popup alert may incorrectly assert to be obtaining from a law enforcement establishment and will certainly report having situated kid porn or other unlawful information on the tool. The alert will in a similar way include a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: 4997B4AA
md5: f2d98b16e1965dcebfd7d38e89b19ba4
name: F2D98B16E1965DCEBFD7D38E89B19BA4.mlw
sha1: 2e3f84b929ec1f0b84255a5e0ed2afc0c6d1617a
sha256: f90c3ec5b435f59dfd0895f8a55e9227f62f5c995f6a3f9c6d82ff7d924ec3ba
sha512: 16223a699d2d516fc64502e2d1c4137ae746dea5b6585d6a6f46dfaa000a9a58c34c78d9c2db35b2bc332d21b3795713384ee4c888a4947dcf0b28e57ba50b37
ssdeep: 49152:h02W0A5wtRMYLpg/LeLSRIaERGs0zL9sc6v1EMc:h0z5wXjC/LFKaEp0zRr6v1E
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

LegalCopyright: Copyright xa9 1998-2017 VMware, Inc.
InternalName: vprintproxy
FileVersion: 12.5.5 build-5234757
CompanyName: VMware, Inc.
ProductName: VMware Workstation
ProductVersion: 12.5.5 build-5234757
FileDescription: VMware VPrint Proxy
OriginalFilename: vprintproxy.exe
Translation: 0x0409 0x04b0

Trojan:MSIL/Bokytuda.B!bit also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader24.37021
MicroWorld-eScan Gen:Variant.Razy.161949
McAfee GenericRXBF-HU!F2D98B16E196
Malwarebytes Malware.AI.4132319881
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.MSIL.NanoBot.m!c
K7AntiVirus Trojan ( 700000121 )
BitDefender Gen:Variant.Razy.161949
K7GW Trojan ( 700000121 )
Cybereason malicious.6e1965
BitDefenderTheta Gen:NN.ZemsilF.34804.eo0@a8cDbKc
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Backdoor.MSIL.NanoBot.vpz
NANO-Antivirus Trojan.Win32.NanoBot.eqpzcb
Rising Ransom.Blocker!8.12A (TFE:C:bCciLp1QEsN)
Ad-Aware Gen:Variant.Razy.161949
Sophos Mal/Generic-S
Comodo Malware@#3i5xxkeor0laq
F-Secure Heuristic.HEUR/AGEN.1121250
Zillya Backdoor.NanoBot.Win32.10
Emsisoft Gen:Variant.Razy.161949 (B)
Jiangmin Trojan.Inject.xzn
Avira HEUR/AGEN.1121250
Antiy-AVL Trojan[Backdoor]/MSIL.NanoBot
Microsoft Trojan:MSIL/Bokytuda.B!bit
Arcabit Trojan.Razy.D2789D
ZoneAlarm Backdoor.MSIL.NanoBot.vpz
GData Gen:Variant.Razy.161949
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.NanoBot.C1956084
ALYac Gen:Variant.Razy.161949
MAX malware (ai score=89)
Panda Trj/GdSda.A
ESET-NOD32 a variant of MSIL/Injector.RXL
Tencent Malware.Win32.Gencirc.114989c1
Yandex Trojan.Injector!vm5qW7RlbRU
SentinelOne Static AI – Suspicious PE
Fortinet MSIL/GenKryptik.AEGS!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Sorter.AVE.DotNetFile.A

How to remove Trojan:MSIL/Bokytuda.B!bit 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

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 Trojan:MSIL/Bokytuda.B!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 Trojan:MSIL/Bokytuda.B!bit 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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