Written by Robert Bailey

What is MSIL/Filecoder.EO infection?

In this short article you will discover about the interpretation of MSIL/Filecoder.EO as well as its adverse influence on your computer. Such ransomware are a type of malware that is specified by online fraudulences to demand paying the ransom money by a sufferer.

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Most of the instances, MSIL/Filecoder.EO infection will instruct its sufferers to initiate funds move for the function of counteracting the changes that the Trojan infection has actually introduced to the victim’s tool.

MSIL/Filecoder.EO Summary

These modifications can be as complies with:

  • 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.
  • 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 copy of itself;
  • Ciphering the papers found on the victim’s disk drive — so the victim can no more make use of the data;
  • Preventing regular access to the victim’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 normal channels whereby MSIL/Filecoder.EO are injected are:

  • By ways of phishing emails;
  • As a consequence of user winding up on a source that organizes a harmful software application;

As soon as the Trojan is successfully injected, it will either cipher the information on the victim’s computer or prevent the gadget from functioning in an appropriate manner – while also positioning a ransom note that states the demand for the victims to effect the payment for the objective of decrypting the records or restoring the data system back to the first condition. In most circumstances, the ransom money note will certainly come up when the client reboots the COMPUTER after the system has actually currently been harmed.

MSIL/Filecoder.EO distribution channels.

In different corners of the globe, MSIL/Filecoder.EO grows by leaps and also bounds. Nevertheless, the ransom money notes and tricks of extorting the ransom amount might vary relying on specific regional (local) setups. The ransom money notes as well as tricks of extorting the ransom quantity may differ depending on certain local (local) setups.

Ransomware injection

For example:

    Faulty informs regarding unlicensed software application.

    In particular areas, the Trojans usually wrongfully report having identified some unlicensed applications made it possible for on the target’s gadget. The alert after that demands the customer to pay the ransom money.

    Faulty declarations concerning unlawful material.

    In nations where software piracy is much less preferred, this method is not as efficient for the cyber fraudulences. Conversely, the MSIL/Filecoder.EO popup alert might incorrectly assert to be originating from a law enforcement establishment and also will certainly report having located child pornography or various other illegal information on the tool.

    MSIL/Filecoder.EO popup alert might wrongly claim to be acquiring from a legislation enforcement institution as well as will report having located youngster porn or various other unlawful information on the device. The alert will similarly contain a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: FC8533B5
md5: 63d4e4dac57bd7d2059587eba4162652
name: 63D4E4DAC57BD7D2059587EBA4162652.mlw
sha1: 08879dbe7e0b9f2fb796057bd549e2933c86f4e3
sha256: 9182432e60ea007cbfae7eed92082e7ef0f2d00674dfe1b2ad956f7c9d494adb
sha512: f12a84b9208131a34d8db7ce682ae1ed3e4dc91504242b89802e118a4dc6fba85cdc09497429c3821c14f06d7de70a6ca8c1d6815f9ab3d31211889da2a806c4
ssdeep: 768:zlCSPuLCdR5gAbBgTA6wBtogr1hdM90gD9X5lN5pA3/yAsQo0:5x37bBgT0Bto2hduljyPyAsQR
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2016
Assembly Version:
InternalName: SureRansom.exe
ProductName: SureRansom
FileDescription: SureRansom
OriginalFilename: SureRansom.exe

MSIL/Filecoder.EO also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Riskware ( 0040eff71 )
DrWeb Trojan.DownLoader23.51037
Cynet Malicious (score: 99)
ALYac Trojan.Ransom.SureRansom
Cylance Unsafe
Zillya Trojan.Agent.Win32.821078
Sangfor Trojan.Win32.Filecoder.8
Alibaba Trojan:MSIL/Filecoder.44206516
K7GW Riskware ( 0040eff71 )
Cybereason malicious.ac57bd
Symantec Infostealer.Limitail
ESET-NOD32 MSIL/Filecoder.EO
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan.MSIL.Agent.ackdq
BitDefender Trojan.Ransom.Sure.A
NANO-Antivirus Trojan.Win32.Agent.elgsbd
SUPERAntiSpyware Ransom.Filecoder/Variant
MicroWorld-eScan Trojan.Ransom.Sure.A
Tencent Msil.Trojan.Agent.Wptk
Ad-Aware Trojan.Ransom.Sure.A
Sophos Mal/Generic-S
Comodo Malware@#i08qiuj89kr4
BitDefenderTheta Gen:NN.ZemsilF.34678.jm0@aamGCXi
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition Artemis!Trojan
Emsisoft Trojan.Ransom.Sure.A (B)
Jiangmin Trojan.MSIL.gvat
Webroot W32.Ransomware.Gen
Avira HEUR/AGEN.1131879
Kingsoft Win32.Troj.Agent.(kcloud)
Microsoft Ransom:Win32/FileCryptor
Arcabit Trojan.Ransom.Sure.A
AegisLab Trojan.MSIL.Agent.4!c
GData MSIL.Trojan-Ransom.SureRansom.A
AhnLab-V3 Trojan/Win32.FileCryptor.C1774016
McAfee Artemis!63D4E4DAC57B
MAX malware (ai score=100)
VBA32 Trojan.MSIL.gen.18
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_SURERAN.THGAFAH
Rising Ransom.FileCryptor!8.1A7 (CLOUD)
Yandex Trojan.Agent!4e/1KtzmFmg
Ikarus Trojan.Agent
Fortinet MSIL/Filecoder.EO!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Ransom.Generic.HwMAkJcA

How to remove MSIL/Filecoder.EO virus?

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 MSIL/Filecoder.EO 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 MSIL/Filecoder.EO 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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