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

What is Trojan:MSIL/Wirzemro.B infection?

In this article you will find concerning the meaning of Trojan:MSIL/Wirzemro.B as well as its unfavorable effect on your computer system. Such ransomware are a form of malware that is clarified by on-line scams to require paying the ransom by a target.

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Most of the situations, Trojan:MSIL/Wirzemro.B virus will certainly instruct its sufferers to initiate funds transfer for the objective of reducing the effects of the amendments that the Trojan infection has actually presented to the victim’s tool.

Trojan:MSIL/Wirzemro.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.
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • 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
  • Ciphering the records situated on the victim’s hard disk drive — so the sufferer can no more use the data;
  • Preventing normal accessibility to the target’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.
Similar behavior
Related domains HEUR:Trojan-Ransom.Win32.Generic HEUR:Trojan-Ransom.Win32.Generic


The most common networks where Trojan:MSIL/Wirzemro.B Ransomware Trojans are injected are:

  • By ways of phishing e-mails;
  • As a repercussion of customer ending up on a resource that organizes a destructive software program;

As soon as the Trojan is effectively injected, it will either cipher the data on the victim’s computer or avoid the device from operating in an appropriate fashion – while additionally putting a ransom money note that points out the requirement for the sufferers to impact the settlement for the purpose of decrypting the documents or restoring the file system back to the first problem. In most circumstances, the ransom note will certainly show up when the client restarts the COMPUTER after the system has actually already been damaged.

Trojan:MSIL/Wirzemro.B circulation networks.

In numerous corners of the world, Trojan:MSIL/Wirzemro.B expands by leaps as well as bounds. Nonetheless, the ransom notes as well as tricks of obtaining the ransom quantity might differ depending on specific regional (local) settings. The ransom money notes as well as techniques of obtaining the ransom money quantity may differ depending on certain neighborhood (regional) settings.

Ransomware injection

For example:

    Faulty notifies regarding unlicensed software.

    In particular areas, the Trojans frequently wrongfully report having spotted some unlicensed applications enabled on the target’s tool. The sharp then demands the customer to pay the ransom money.

    Faulty statements regarding prohibited web content.

    In countries where software program piracy is less popular, this method is not as efficient for the cyber fraudulences. Alternatively, the Trojan:MSIL/Wirzemro.B popup alert might wrongly assert to be deriving from a police institution as well as will certainly report having situated kid pornography or various other illegal information on the tool.

    Trojan:MSIL/Wirzemro.B popup alert may falsely declare to be acquiring from a legislation enforcement organization as well as will certainly report having situated child pornography or various other unlawful data on the tool. The alert will similarly have a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: 06BA2862
md5: 16f392ede2539ec6eccdccf1cdbec49a
name: 16F392EDE2539EC6ECCDCCF1CDBEC49A.mlw
sha1: dda5786e8c67a7483a91279cd55f4a646cd9dd08
sha256: 63cd1fb6e4fc96703baedf1e397ec29db153adbb5746ec5b804819581dc1c5c3
sha512: f803393ed5470ade23b0a0bc7e4decaa4c0d9cec7247786cb82b2aa7cc5c8c6cb49f06212ebe87032838e84f9adefbd1bdae1a348af9add3766a278c3093fbb2
ssdeep: 6144:yKXPXu/7+QxDiM5snMvB0EmKLZPDvOBpqgOMYIOaSteMd6ZOHQbSzavYgQ0:K7hf3bvOBpXYIOZZdrESzWYW
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright
Assembly Version:
InternalName: Caster.exe
FileDescription: CAstro
OriginalFilename: Caster.exe

Trojan:MSIL/Wirzemro.B also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Adware.WizzMonetize.1
Cynet Malicious (score: 99)
ALYac Gen:Variant.MSILPerseus.153086
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_70% (D)
Cybereason malicious.de2539
Cyren W32/MSIL_Agent.HD.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Adware.CsdiMonetize.AC
APEX Malicious
Avast Win32:Adware-gen [Adw]
ClamAV Win.Malware.Ursu-6838893-0
Kaspersky HEUR:Trojan-Ransom.Win32.Generic
BitDefender Gen:Variant.MSILPerseus.153086
NANO-Antivirus Trojan.Win32.WizzMonetize.fedhix
SUPERAntiSpyware Adware.CsdiMonetize/Variant
MicroWorld-eScan Gen:Variant.MSILPerseus.153086
Tencent Msil.Adware.Csdimonetize.Eaxn
Ad-Aware Gen:Variant.MSILPerseus.153086
Sophos Generic PUA NN (PUA)
Comodo ApplicUnwnt@#11b2jxuj77hjj
BitDefenderTheta Gen:NN.ZemsilF.34690.Jm0@aOIUl@o
McAfee-GW-Edition BehavesLike.Win32.Generic.hh
Emsisoft Gen:Variant.MSILPerseus.153086 (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1104920
eGambit Unsafe.AI_Score_99%
Microsoft Trojan:MSIL/Wirzemro.B
Arcabit Trojan.MSILPerseus.D255FE
AegisLab Trojan.Win32.Generic.j!c
GData Gen:Variant.MSILPerseus.153086
AhnLab-V3 Trojan/Win32.Ransomlock.R230266
MAX malware (ai score=98)
VBA32 TScope.Trojan.MSIL
Malwarebytes Adware.Tuto4PC
Panda Trj/GdSda.A
Rising Ransom.Generic!8.E315 (CLOUD)
Yandex PUA.CsdiMonetize!Ic37OmGgA0Y
Ikarus AdWare.MSIL.Csdimonetize
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Generic.AC!tr
AVG Win32:Adware-gen [Adw]

How to remove Trojan:MSIL/Wirzemro.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 Trojan:MSIL/Wirzemro.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 Trojan:MSIL/Wirzemro.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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