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

What is Trojan:Win32/MultiInjector.A!rfn infection?

In this short article you will locate regarding the interpretation of Trojan:Win32/MultiInjector.A!rfn as well as its adverse impact on your computer system. Such ransomware are a type of malware that is elaborated by on-line frauds to demand paying the ransom money by a sufferer.

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Most of the situations, Trojan:Win32/MultiInjector.A!rfn ransomware will certainly instruct its victims to initiate funds move for the purpose of counteracting the modifications that the Trojan infection has actually presented to the victim’s gadget.

Trojan:Win32/MultiInjector.A!rfn Summary

These alterations can be as follows:

  • 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.
  • Detected script timer window indicative of sleep style evasion;
  • 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.

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • A scripting utility was executed;
  • A potential decoy document was displayed to the user;
  • 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
  • Stores JavaScript or a script command in the registry, likely for persistence or configuration;
  • 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.
  • Harvests information related to installed mail clients;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the records found on the sufferer’s hard drive — so the sufferer can no more utilize the information;
  • Preventing normal accessibility to the victim’s workstation;


One of the most typical networks whereby Trojan:Win32/MultiInjector.A!rfn Trojans are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a repercussion of individual winding up on a source that organizes a malicious software program;

As soon as the Trojan is successfully infused, it will certainly either cipher the information on the sufferer’s PC or avoid the device from operating in a proper way – while also putting a ransom note that points out the demand for the sufferers to impact the repayment for the function of decrypting the records or recovering the documents system back to the preliminary condition. In the majority of instances, the ransom note will certainly show up when the customer restarts the COMPUTER after the system has actually already been harmed.

Trojan:Win32/MultiInjector.A!rfn distribution channels.

In various corners of the world, Trojan:Win32/MultiInjector.A!rfn expands by leaps as well as bounds. However, the ransom notes and also tricks of obtaining the ransom money quantity may differ depending on particular neighborhood (local) settings. The ransom money notes as well as tricks of extorting the ransom quantity might differ depending on certain regional (local) settings.

Ransomware injection

As an example:

    Faulty alerts concerning unlicensed software application.

    In specific areas, the Trojans typically wrongfully report having actually detected some unlicensed applications made it possible for on the target’s tool. The alert then requires the customer to pay the ransom.

    Faulty statements regarding illegal content.

    In nations where software piracy is less popular, this method is not as effective for the cyber fraudulences. Conversely, the Trojan:Win32/MultiInjector.A!rfn popup alert may falsely claim to be deriving from a law enforcement institution as well as will report having situated youngster porn or various other prohibited data on the gadget.

    Trojan:Win32/MultiInjector.A!rfn popup alert might incorrectly claim to be acquiring from a regulation enforcement institution and will certainly report having situated child porn or various other illegal information on the gadget. The alert will similarly have a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 355D2975
md5: 5e59acf240e2881b1c1e2f5586c9ca6f
name: 5E59ACF240E2881B1C1E2F5586C9CA6F.mlw
sha1: 8e0e8da216995f184dccabb23f012b05192c9f1d
sha256: 478d6176fcf3cef7b49dd302581519ba0303b38fd6788dd948a8b367ebed423d
sha512: 7dbb039c2a9d5b64b8465a8b6f65b7e47f8a6d97b07b98884947d062a986869d0dfdb1bb78d306142728158d78a672234df740aa0cc0323501f97c5f83627420
ssdeep: 12288:Qbr2FYUReCTt3PHPWGWRcR6eDt7XjSaAYet:myFxReCdPVXMutbjmt
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

Translation: 0x0409 0x04b0

Trojan:Win32/MultiInjector.A!rfn also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
MicroWorld-eScan Trojan.AgentWDCR.ENI
CAT-QuickHeal Trojan.MultiInjector
Qihoo-360 Win32/Ransom.Blocker.HwsBhvsA
McAfee Generic.wy
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Blocker.j!c
K7AntiVirus Trojan ( 004c2b1c1 )
BitDefender Trojan.AgentWDCR.ENI
K7GW Trojan ( 004c2b1c1 )
Arcabit Trojan.AgentWDCR.ENI
Cyren W32/Backdoor.YCLO-3018
Symantec Trojan Horse
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.heat
Alibaba Ransom:Win32/Blocker.708b68fd
NANO-Antivirus Trojan.Win32.Blocker.dsmmtl
Rising (CLASSIC)
Ad-Aware Trojan.AgentWDCR.ENI
Emsisoft Trojan.AgentWDCR.ENI (B)
Comodo Malware@#1qo9kdk9cwjaj
F-Secure Trojan.TR/Houcecut.A.9
DrWeb Trojan.Siggen6.37994
Zillya Worm.Agent.Win32.29750
McAfee-GW-Edition BehavesLike.Win32.Spyware.gc
FireEye Trojan.AgentWDCR.ENI
Sophos Mal/Generic-L
Ikarus Worm.VBS.Agent
Jiangmin Trojan/Blocker.npw
Webroot W32.Trojan.Agent.Gen
Avira TR/Houcecut.A.9
MAX malware (ai score=99)
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:Win32/MultiInjector.A!rfn
ZoneAlarm Trojan-Ransom.Win32.Blocker.heat
GData Win32.Trojan.Agent.1WECMT
Cynet Malicious (score: 85)
AhnLab-V3 Malware/Win32.Generic.C924350
ALYac Trojan.AgentWDCR.ENI
VBA32 Hoax.Blocker
Malwarebytes Malware.Heuristic.1003
Panda Trj/Chgt.O
Zoner Trojan.Win32.35056
Tencent Win32.Trojan.Blocker.Sxyn
Yandex Trojan.Blocker!0HKVWZQfGcY
Fortinet W32/Blocker.HEAT!tr
AVG Win32:Malware-gen
Cybereason malicious.240e28

How to remove Trojan:Win32/MultiInjector.A!rfn 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:Win32/MultiInjector.A!rfn 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:Win32/MultiInjector.A!rfn you can always ask me in the comments for getting help.

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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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