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

What is Win32/Koutodoor.HN infection?

In this post you will locate about the definition of Win32/Koutodoor.HN as well as its adverse impact on your computer. Such ransomware are a form of malware that is specified by on-line scams to demand paying the ransom money by a victim.

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Most of the cases, Win32/Koutodoor.HN ransomware will certainly advise its targets to initiate funds transfer for the purpose of counteracting the changes that the Trojan infection has actually introduced to the sufferer’s gadget.

Win32/Koutodoor.HN Summary

These alterations can be as adheres to:

  • 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 files located on the victim’s disk drive — so the victim can no longer make use of the data;
  • Preventing normal access to the sufferer’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


The most normal networks through which Win32/Koutodoor.HN Ransomware Trojans are injected are:

  • By means of phishing emails;
  • As a consequence of user winding up on a resource that organizes a harmful software;

As quickly as the Trojan is effectively injected, it will either cipher the information on the target’s computer or avoid the tool from operating in a correct manner – while also putting a ransom money note that discusses the requirement for the victims to impact the settlement for the function of decrypting the papers or restoring the file system back to the preliminary condition. In most circumstances, the ransom money note will certainly come up when the client restarts the PC after the system has currently been damaged.

Win32/Koutodoor.HN circulation channels.

In numerous edges of the globe, Win32/Koutodoor.HN grows by leaps and also bounds. Nonetheless, the ransom notes and also techniques of obtaining the ransom money quantity may differ relying on specific regional (local) settings. The ransom notes as well as techniques of obtaining the ransom amount may differ depending on certain neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty notifies concerning unlicensed software application.

    In specific areas, the Trojans frequently wrongfully report having actually identified some unlicensed applications enabled on the target’s tool. The alert after that requires the individual to pay the ransom.

    Faulty statements about illegal material.

    In countries where software program piracy is much less popular, this technique is not as efficient for the cyber frauds. Conversely, the Win32/Koutodoor.HN popup alert might incorrectly claim to be stemming from a law enforcement establishment as well as will report having situated child porn or various other unlawful data on the gadget.

    Win32/Koutodoor.HN popup alert may wrongly assert to be deriving from a law enforcement institution as well as will certainly report having located kid pornography or other illegal information on the device. The alert will likewise include a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: CF13C031
md5: d6985461ac85cac76cb3e04df5b704de
name: D6985461AC85CAC76CB3E04DF5B704DE.mlw
sha1: 1731b3e84abbc4bc8eda783dad1918f3ef742b31
sha256: e917440846bf337428764952cc131f3f209a044ea986f69609294f1e3cd5367f
sha512: 17efaa03d31ae5a26099b1ca68977fdc6b1e561b94a1130b78ac97ec0a0ccf5d2a0de80b3b0b80e57a26bd2cb7d862070d8708e56a25bd5007b13b12c7b0877d
ssdeep: 1536:J2u1QsaywmKBG76bn/ySzboJQ0sDpAWl0Y7RNZMBAZI0FSXZF3TkXjx:L67TboJOpAWd3qBAZ1gX0F
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

Win32/Koutodoor.HN also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 001930d11 )
Elastic malicious (high confidence)
DrWeb Trojan.RKDoor.10687
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Koutodoor.MUE.A4
ALYac Gen:Variant.Barys.54547
Cylance Unsafe
Zillya Trojan.Koutodoor.Win32.31369
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Trojan:Win32/Koutodoor.99883da8
K7GW Trojan ( 001930d11 )
Cybereason malicious.1ac85c
Baidu Win32.Rootkit.Koutodoor.a
Cyren W32/Koutodoor.N.gen!Eldorado
Symantec Trojan.Koutodoor!gen
ESET-NOD32 a variant of Win32/Koutodoor.HN
APEX Malicious
Avast Win32:Caxnet [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Barys.54547
NANO-Antivirus Trojan.Win32.MLW.evaszt
ViRobot Backdoor.Win32.A.Koutodoor.84544.A
MicroWorld-eScan Gen:Variant.Barys.54547
Tencent Malware.Win32.Gencirc.10c18acf
Ad-Aware Gen:Variant.Barys.54547
Sophos ML/PE-A + Mal/Koutodoor-A
Comodo TrojWare.Win32.Koutdoor.HR@4ri74j
BitDefenderTheta AI:Packer.AE7E7DE321
VIPRE Trojan.Win32.Koutodoor.e (v)
Emsisoft Gen:Variant.Barys.54547 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/JunkCode.Gen
Avira TR/Dropper.Gen
eGambit Unsafe.AI_Score_100%
Antiy-AVL Trojan/Generic.ASMalwS.183E719
Microsoft Trojan:Win32/Koutodoor.E
Arcabit Trojan.Barys.DD513
AegisLab Trojan.Win32.Generic.l7iX
GData Win32.Trojan.PSE.15Y6OF0
AhnLab-V3 Trojan/Win32.Koutodoor.R1634
Acronis suspicious
McAfee Trojan-FDZU!D6985461AC85
MAX malware (ai score=88)
VBA32 BScope.Trojan.Click
Panda Bck/Koutodoor.E
TrendMicro-HouseCall BKDR_KTDOOR.SMIC
Rising Trojan.Fedwj!1.98EA (CLASSIC)
Ikarus Trojan.Win32.Koutodoor
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Koutodoor.D!tr.bdr
AVG Win32:Caxnet [Trj]

How to remove Win32/Koutodoor.HN 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 Win32/Koutodoor.HN 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 Win32/Koutodoor.HN 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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