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

What is Trojan:Win32/Koutodoor.E infection?

In this post you will locate about the meaning of Trojan:Win32/Koutodoor.E and also its unfavorable influence on your computer. Such ransomware are a form of malware that is clarified by online frauds to require paying the ransom by a sufferer.

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In the majority of the instances, Trojan:Win32/Koutodoor.E virus will certainly advise its victims to start funds move for the function of neutralizing the changes that the Trojan infection has actually introduced to the victim’s gadget.

Trojan:Win32/Koutodoor.E Summary

These adjustments can be as follows:

  • Possible date expiration check, exits too soon after checking local time;
  • Unconventionial binary language: Chinese (Simplified);
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • 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 documents located on the sufferer’s hard disk drive — so the target can no more use the data;
  • Preventing routine accessibility 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.


One of the most typical channels where Trojan:Win32/Koutodoor.E Ransomware Trojans are infused 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 an effect of customer ending up on a source that hosts a destructive software;

As soon as the Trojan is successfully infused, it will certainly either cipher the data on the target’s PC or avoid the tool from working in an appropriate fashion – while likewise placing a ransom note that states the requirement for the targets to impact the repayment for the purpose of decrypting the records or recovering the file system back to the first condition. In most circumstances, the ransom money note will certainly come up when the customer restarts the PC after the system has currently been damaged.

Trojan:Win32/Koutodoor.E distribution networks.

In various edges of the world, Trojan:Win32/Koutodoor.E expands by jumps and also bounds. However, the ransom money notes and techniques of extorting the ransom money amount may differ depending on specific neighborhood (regional) setups. The ransom notes as well as tricks of extorting the ransom amount may vary depending on certain regional (regional) setups.

Ransomware injection

As an example:

    Faulty notifies regarding unlicensed software program.

    In certain locations, the Trojans commonly wrongfully report having spotted some unlicensed applications enabled on the target’s tool. The alert then requires the individual to pay the ransom.

    Faulty statements concerning unlawful web content.

    In countries where software program piracy is less preferred, this method is not as efficient for the cyber frauds. Conversely, the Trojan:Win32/Koutodoor.E popup alert may wrongly claim to be originating from a law enforcement establishment and also will report having situated youngster porn or other unlawful information on the gadget.

    Trojan:Win32/Koutodoor.E popup alert might incorrectly assert to be deriving from a law enforcement institution as well as will certainly report having located youngster porn or various other unlawful information on the gadget. The alert will likewise contain a need for the user to pay the ransom money.

Technical details

File Info:

crc32: B45749C3
md5: 2cb829993e29e121fb00bbcb75df1f23
name: 2CB829993E29E121FB00BBCB75DF1F23.mlw
sha1: 03db5dcdba53447d5ad90e780406695c7f9e826e
sha256: 4e32156ec3c0634a66fd39d348960a56dd681fa63235a084d7b069a5786d0071
sha512: 63b8c1e1ae6d04540b57e443366fba4c992c5ed26c68c1badee27c19f5dc03b90a704ef99534bbea0f800589baec93f5218ef739f4836fa70403736c1c238e57
ssdeep: 1536:aLWBNw7zoZjTvkdXFXsoVXSZztGFXTtfDIiT1SmaGgyRlcAri:a+Tvkl5DVXSZzojtfDIggu6ci
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright 2010
ProductVersion: 1, 0, 0, 0
FileVersion: 1, 0, 0, 0
Translation: 0x0804 0x04b0

Trojan:Win32/Koutodoor.E also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Barys.54547
Qihoo-360 Trojan.Win32.Koutodoor.AS
McAfee Trojan-FDZU!2CB829993E29
Cylance Unsafe
VIPRE Trojan.Win32.Koutodoor.e (v)
K7AntiVirus Trojan ( 001930d11 )
BitDefender Gen:Variant.Barys.54547
K7GW Trojan ( 001930d11 )
Cybereason malicious.93e29e
BitDefenderTheta AI:Packer.4831AD2821
Cyren W32/Koutodoor.N.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Koutodoor.GU
Baidu Win32.Rootkit.Koutodoor.a
TrendMicro-HouseCall HT_KOUTODOOR_FE120117.UVPM
Avast Win32:Caxnet [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Trojan:Win32/Koutodoor.3e68e2e4
NANO-Antivirus Trojan.Win32.MLW.dtcox
ViRobot Backdoor.Win32.A.Koutodoor.83520.G
AegisLab Trojan.Win32.Generic.lxS3
APEX Malicious
Tencent Malware.Win32.Gencirc.10c064cd
Ad-Aware Gen:Variant.Barys.54547
Emsisoft Gen:Variant.Barys.54547 (B)
Comodo TrojWare.Win32.Zybr.A@1gtnwn
F-Secure Trojan.TR/Dropper.Gen
DrWeb Trojan.MulDrop4.7488
Zillya Trojan.Koutodoor.Win32.31374
Sophos ML/PE-A + Mal/Koutodoor-A
Ikarus Trojan.Win32.Koutodoor
Jiangmin Trojan/JunkCode.Gen
Avira TR/Dropper.Gen
MAX malware (ai score=100)
Antiy-AVL Trojan/Win32.Unknown
Kingsoft Win32.Infected.AutoInfector.a.(kcloud)
Microsoft Trojan:Win32/Koutodoor.E
Arcabit Trojan.Barys.DD513
AhnLab-V3 Trojan/Win32.Koutodoor.R1634
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Gen:Variant.Barys.54547
Cynet Malicious (score: 100)
TotalDefense Win32/Koutodoor.D!generic
Acronis suspicious
VBA32 BScope.Trojan.Click
ALYac Gen:Variant.Barys.54547
Malwarebytes MachineLearning/Anomalous.95%
Panda Bck/Koutodoor.E
Rising Trojan.Fedwj!1.98EA (CLOUD)
Yandex Trojan.GenAsa!QFQ/BDhi4qE
SentinelOne Static AI – Malicious PE
eGambit Generic.Dropper
Fortinet W32/Koutodoor.D!tr.bdr
AVG Win32:Caxnet [Trj]
CrowdStrike win/malicious_confidence_100% (D)

How to remove Trojan:Win32/Koutodoor.E 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/Koutodoor.E 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/Koutodoor.E 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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