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

What is Win32/Filecoder.NKB infection?

In this post you will certainly locate concerning the definition of Win32/Filecoder.NKB and also its negative effect on your computer. Such ransomware are a type of malware that is elaborated by online fraudulences to demand paying the ransom money by a sufferer.

GridinSoft Anti-Malware Review
It is better to prevent, than repair and repent!
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.
Gridinsoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | 10% Off Coupon
Subscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.

In the majority of the situations, Win32/Filecoder.NKB ransomware will instruct its victims to launch funds transfer for the objective of counteracting the amendments that the Trojan infection has presented to the target’s tool.

Win32/Filecoder.NKB Summary

These adjustments can be as adheres to:

  • The binary likely contains encrypted or compressed data.;
  • The executable is compressed using UPX;
  • Ciphering the documents situated on the target’s disk drive — so the victim can no more use the data;
  • Preventing regular access to the sufferer’s workstation;

Related domains: Trojan.Ransom.Kaenlupuf


One of the most regular channels through which Win32/Filecoder.NKB Trojans are injected are:

  • By methods of phishing emails;
  • As a repercussion of user winding up on a resource that organizes a destructive software;

As quickly as the Trojan is successfully infused, it will either cipher the information on the target’s computer or avoid the gadget from functioning in an appropriate manner – while also putting a ransom money note that points out the need for the sufferers to impact the payment for the objective of decrypting the records or bring back the documents system back to the first condition. In a lot of circumstances, the ransom money note will show up when the client reboots the COMPUTER after the system has currently been damaged.

Win32/Filecoder.NKB distribution channels.

In numerous corners of the world, Win32/Filecoder.NKB grows by leaps and bounds. However, the ransom notes as well as techniques of extorting the ransom money quantity may differ relying on particular neighborhood (regional) setups. The ransom money notes as well as tricks of extorting the ransom amount may vary depending on particular regional (local) setups.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software program.

    In specific locations, the Trojans commonly wrongfully report having spotted some unlicensed applications made it possible for on the victim’s tool. The alert after that demands the user to pay the ransom money.

    Faulty statements concerning illegal material.

    In nations where software application piracy is less prominent, this technique is not as effective for the cyber frauds. Alternatively, the Win32/Filecoder.NKB popup alert might falsely declare to be deriving from a police organization and will report having located youngster porn or other prohibited data on the tool.

    Win32/Filecoder.NKB popup alert may falsely claim to be acquiring from a law enforcement organization and also will certainly report having situated child porn or other unlawful data on the gadget. The alert will in a similar way include a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 58B52CD5
md5: a1f580897095e5a1012d6eabcc1994fe
name: A1F580897095E5A1012D6EABCC1994FE.mlw
sha1: 7277b62b48c2922b34f3d800164854c5255a6845
sha256: 2f03a3879c6f1984a50c4c888f3262cb24653d3c0d1833e1a2425dd781432e55
sha512: 4acb30d9ce5384f1f6e1877e0cd7554b53b7e676fac6eaaf41c9f9639249b902ee70849057bfe1749f6eb92b355e576e9b1739489050beceb1e7c1dc89a4e991
ssdeep: 12288:yEQe24E28DgBYAzKzmQtg3pLXH0M+Fcku:DQtvBDKZzug3ZH0xu
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: ajaw-rsa.exe
FileVersion: 4.10.14392.0
CompanyName: xa9 Microsoft Corporation. All rights reserved.
ProductName: Microsoftxae Windowsxae Operating System
ProductVersion: 4.10.14392.0
FileDescription: Microsoft Network Realtime Inspection Service
OriginalFilename: netsvc.exe
Translation: 0x0409 0x04b0

Win32/Filecoder.NKB also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 00507fd51 )
Lionic Riskware.Win32.Generic.1!c
CAT-QuickHeal Trojan.MauvaiseRI.S5246342
ALYac Trojan.Ransom.Kaenlupuf
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
K7GW Trojan ( 00507fd51 )
Cybereason malicious.97095e
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Filecoder.NKB
APEX Malicious
Avast Win32:Malware-gen
Kaspersky UDS:DangerousObject.Multi.Generic
BitDefender Trojan.Agent.CEPD
NANO-Antivirus Trojan.Win32.FileCoder.emldel
MicroWorld-eScan Trojan.Agent.CEPD
Tencent Win32.Trojan.Filecoder.Lnnx
Ad-Aware Trojan.Agent.CEPD
Sophos Mal/Generic-S
Comodo Malware@#4k57z7khjpx6
BitDefenderTheta Gen:NN.ZexaF.34170.CmKfaePjk4ii
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_KAENLUPUF.A
McAfee-GW-Edition BehavesLike.Win32.Fake.gc
Emsisoft Trojan-Ransom.Kaenlupuf (A)
SentinelOne Static AI – Malicious PE
Webroot Trojan.Dropper.Gen
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.Heur.KVM003.a.(kcloud)
Microsoft Ransom:Win32/FileCryptor
Arcabit Trojan.Agent.CEPD
GData Trojan.Agent.CEPD
McAfee RDN/Ransom.cb
MAX malware (ai score=100)
Panda Trj/CI.A
TrendMicro-HouseCall Ransom_KAENLUPUF.A
Yandex Trojan.Filecoder!7W8GdoYn+98
Ikarus Trojan.Win32.Filecoder
Fortinet W32/Filecoder.NKB!tr
AVG Win32:Malware-gen

How to remove Win32/Filecoder.NKB 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 Win32/Filecoder.NKB 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 Win32/Filecoder.NKB you can always ask me in the comments for getting help.

User Review
0 (0 votes)
Comments Rating 0 (0 reviews)


  1. GridinSoft Anti-Malware Review from HowToFix site:
  2. More information about GridinSoft products:

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.

Leave a Reply