Written by Robert Bailey

What is MSIL/TrojanDownloader.Small.COT infection?

In this article you will certainly discover about the meaning of MSIL/TrojanDownloader.Small.COT and also its negative influence on your computer system. Such ransomware are a type of malware that is clarified by on-line scams to require paying the ransom by a sufferer.

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When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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In the majority of the situations, MSIL/TrojanDownloader.Small.COT infection will advise its victims to initiate funds move for the objective of neutralizing the modifications that the Trojan infection has actually introduced to the victim’s gadget.

MSIL/TrojanDownloader.Small.COT Summary

These adjustments can be as adheres to:

  • Anomalous binary characteristics;
  • Ciphering the files located on the target’s hard disk drive — so the target can no longer use the information;
  • Preventing regular accessibility to the victim’s workstation;


The most normal channels where MSIL/TrojanDownloader.Small.COT are injected are:

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

As quickly as the Trojan is efficiently injected, it will certainly either cipher the information on the target’s PC or avoid the device from operating in a proper 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 files or bring back the data system back to the first problem. In most instances, the ransom note will certainly turn up when the client restarts the PC after the system has currently been damaged.

MSIL/TrojanDownloader.Small.COT circulation channels.

In numerous edges of the globe, MSIL/TrojanDownloader.Small.COT grows by leaps as well as bounds. Nevertheless, the ransom money notes as well as techniques of obtaining the ransom quantity might differ depending on particular local (local) setups. The ransom money notes as well as methods of obtaining the ransom quantity may vary depending on specific neighborhood (local) settings.

Ransomware injection

For instance:

    Faulty alerts concerning unlicensed software program.

    In specific locations, the Trojans frequently wrongfully report having found some unlicensed applications allowed on the sufferer’s gadget. The sharp then demands the customer to pay the ransom.

    Faulty statements about prohibited web content.

    In countries where software piracy is less preferred, this approach is not as effective for the cyber frauds. Alternatively, the MSIL/TrojanDownloader.Small.COT popup alert may incorrectly declare to be deriving from a police institution and will report having located kid pornography or other unlawful data on the tool.

    MSIL/TrojanDownloader.Small.COT popup alert might wrongly declare to be deriving from a law enforcement institution and will certainly report having situated youngster porn or other prohibited data on the device. The alert will in a similar way have a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: E8219958
md5: e3bd75e05770ebd9abde78d848488c1d
name: E3BD75E05770EBD9ABDE78D848488C1D.mlw
sha1: 66fa05128ff13512ea044abb5a87a771e3a9d751
sha256: 09d8ca1bb525fa6483c213716d1b9a86dd79490dd90d191f8e2906e80e8bda69
sha512: 9019c57746c968cbb9b7824ee8a1e93ea612f6a60ca2d0301124777ddb403eb41dc8fe5f9e52bc59bc50ec9af5c3ab3da119c85101619289e537acfef9a2b0c1
ssdeep: 384:rZqy0wvRUCefSL/5LOqvORwaz6v8iv7tDLcL2OLdy/MBUw1Z2MBLpLMqy8B0GsqP:r0y0wvWALhLOqvORwaz6v8iv7Bw5Xf24
type: PE32+ executable (GUI) x86-64 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2021
Assembly Version:
InternalName: WindowsFormsApp8.exe
ProductName: WindowsFormsApp8
FileDescription: WindowsFormsApp8
OriginalFilename: WindowsFormsApp8.exe

MSIL/TrojanDownloader.Small.COT also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan-Downloader ( 00581fe21 )
Lionic Trojan.MSIL.Blocker.j!c
Elastic malicious (high confidence)
ALYac Trojan.GenericKD.37544527
Cylance Unsafe
Zillya Trojan.Blocker.Win32.72409
CrowdStrike win/malicious_confidence_90% (W)
Alibaba Ransom:MSIL/Blocker.88699027
K7GW Trojan-Downloader ( 00581fe21 )
Symantec Trojan.Gen.MBT
ESET-NOD32 a variant of MSIL/TrojanDownloader.Small.COT
APEX Malicious
Avast Win64:Malware-gen
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan-Ransom.MSIL.Blocker.gen
BitDefender Trojan.GenericKD.37544527
NANO-Antivirus Trojan.Win64.Ransom.janhji
MicroWorld-eScan Trojan.GenericKD.37544527
Tencent Msil.Trojan.Blocker.Akoz
Ad-Aware Trojan.GenericKD.37544527
Sophos Mal/Generic-S
McAfee-GW-Edition RDN/Ransom
FireEye Trojan.GenericKD.37544527
Emsisoft Trojan.GenericKD.37544527 (B)
SentinelOne Static AI – Malicious PE
Webroot W32.Malware.Gen
Avira HEUR/AGEN.1144615
eGambit Unsafe.AI_Score_96%
Microsoft Trojan:Win32/Wacatac.B!ml
GData Trojan.GenericKD.37544527
McAfee RDN/Ransom
MAX malware (ai score=81)
VBA32 TrojanRansom.MSIL.Blocker
Malwarebytes Trojan.Crypt.MSIL.Generic
Panda Trj/CI.A
Ikarus Trojan-Downloader.MSIL.Small
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Blocker!tr
AVG Win64:Malware-gen

How to remove MSIL/TrojanDownloader.Small.COT 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

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/TrojanDownloader.Small.COT 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/TrojanDownloader.Small.COT 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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