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

What is Backdoor:MSIL/Torwofun.B infection?

In this short article you will certainly find concerning the definition of Backdoor:MSIL/Torwofun.B and its adverse effect on your computer system. Such ransomware are a type of malware that is specified by on the internet frauds to demand paying the ransom money by a sufferer.

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In the majority of the instances, Backdoor:MSIL/Torwofun.B virus will instruct its victims to start funds transfer for the purpose of counteracting the changes that the Trojan infection has actually introduced to the victim’s tool.

Backdoor:MSIL/Torwofun.B Summary

These modifications can be as complies with:

  • 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.
  • 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.
  • Ciphering the records located on the sufferer’s hard disk drive — so the victim can no longer use the data;
  • Preventing regular accessibility to the sufferer’s workstation;
Similar behavior
Related domains Ransom.Win32.Blocker.8 Ransom.Win32.Blocker.8


The most typical networks where Backdoor:MSIL/Torwofun.B Ransomware are injected are:

  • By means of phishing emails;
  • As an effect of customer winding up on a source that hosts a malicious software;

As soon as the Trojan is effectively injected, it will either cipher the information on the target’s PC or stop the tool from operating in an appropriate way – while also putting a ransom money note that discusses the demand for the targets to impact the settlement for the purpose of decrypting the documents or bring back the documents system back to the preliminary condition. In a lot of circumstances, the ransom money note will certainly show up when the client restarts the PC after the system has actually currently been harmed.

Backdoor:MSIL/Torwofun.B distribution networks.

In different edges of the globe, Backdoor:MSIL/Torwofun.B grows by leaps and bounds. Nevertheless, the ransom money notes as well as techniques of obtaining the ransom amount might vary relying on specific local (local) setups. The ransom notes and also techniques of extorting the ransom amount may differ depending on certain regional (regional) setups.

Ransomware injection

As an example:

    Faulty notifies concerning unlicensed software application.

    In specific areas, the Trojans frequently wrongfully report having found some unlicensed applications made it possible for on the victim’s device. The alert after that requires the user to pay the ransom money.

    Faulty statements about unlawful content.

    In nations where software piracy is much less popular, this approach is not as reliable for the cyber fraudulences. Alternatively, the Backdoor:MSIL/Torwofun.B popup alert may incorrectly assert to be originating from a police institution as well as will certainly report having located kid porn or various other prohibited information on the tool.

    Backdoor:MSIL/Torwofun.B popup alert might incorrectly assert to be deriving from a law enforcement establishment and will certainly report having situated child porn or other unlawful information on the device. The alert will likewise contain a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 72046BDD
md5: b92b525045cddfce46d7e82ddacc2e65
name: B92B525045CDDFCE46D7E82DDACC2E65.mlw
sha1: 82a0a698fc086df42b4a2d65c14d5cfe253d45e9
sha256: 1e589eb233e7aeb557f7bce54607d4548c0da1932d691d4c853bd8b69d7de61b
sha512: 45234621f155d30f1eb70f3822ea972a202be2059f5bb9669696bd83430a6730f2937671a90400d267876030af928e34af3416ba3510c7dcbab31dd5a7034c62
ssdeep: 1536:HmekFUOfJxIdolYO/pxhoHLA/XlHLYdW8dbBOowUPknSjdzct6QiRjOKHnGFo6j:HH8/KLK1rYdfOojl
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
Assembly Version:
InternalName: installer_webasm.exe
OriginalFilename: installer_webasm.exe

Backdoor:MSIL/Torwofun.B also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 0055e3e71 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop6.3845
Cynet Malicious (score: 99)
ALYac Gen:Variant.Razy.805702
Cylance Unsafe
Zillya Trojan.Blocker.Win32.31166
Sangfor Ransom.Win32.Blocker.8
CrowdStrike win/malicious_confidence_100% (D)
K7GW Trojan ( 0055e3e71 )
Cybereason malicious.045cdd
ESET-NOD32 a variant of MSIL/Agent.QDR
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.gutk
BitDefender Gen:Variant.Razy.805702
NANO-Antivirus Trojan.Win32.Badur.dzthgt
MicroWorld-eScan Gen:Variant.Razy.805702
Tencent Win32.Trojan.Blocker.Pepn
Ad-Aware Gen:Variant.Razy.805702
Sophos ML/PE-A
Comodo Backdoor.MSIL.Bladabindi.ABC@6b1idd
BitDefenderTheta Gen:NN.ZemsilF.34722.km0@aubyzan
VIPRE Trojan.Win32.Generic!BT
Emsisoft Gen:Variant.Razy.805702 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Blocker.ibq
Avira HEUR/AGEN.1106288
Antiy-AVL Trojan/Generic.ASMalwS.13E01C2
Kingsoft Win32.Troj.Generic_a.a.(kcloud)
Microsoft Backdoor:MSIL/Torwofun.B
Arcabit Trojan.Razy.DC4B46
AegisLab Trojan.Win32.Blocker.j!c
GData Gen:Variant.Razy.805702
AhnLab-V3 Trojan/Win32.Torwofun.R192172
McAfee GenericRXAL-SO!B92B525045CD
MAX malware (ai score=83)
Panda Trj/CI.A
Yandex Trojan.Agent!ddnvX0ddWxA
Ikarus Trojan.MSIL.Agent
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Blocker.GUTK!tr
AVG Win32:Malware-gen

How to remove Backdoor:MSIL/Torwofun.B ransomware?

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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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 Backdoor:MSIL/Torwofun.B 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 Backdoor:MSIL/Torwofun.B 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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