Win32/Filecoder.NKD

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

What is Win32/Filecoder.NKD infection?

In this post you will certainly find about the definition of Win32/Filecoder.NKD and also its unfavorable effect on your computer system. Such ransomware are a form of malware that is elaborated by on the internet fraudulences to demand paying the ransom money by a sufferer.

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In the majority of the cases, Win32/Filecoder.NKD ransomware will certainly advise its sufferers to initiate funds move for the function of counteracting the modifications that the Trojan infection has introduced to the victim’s gadget.

Win32/Filecoder.NKD 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • Expresses interest in specific running processes;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • Deletes its original binary from disk;
  • Attempts to delete volume shadow copies;
  • Modifies boot configuration settings;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • 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;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the papers found on the victim’s hard disk — so the target can no more use the information;
  • Preventing routine access to the sufferer’s workstation;

Win32/Filecoder.NKD

The most common channels whereby Win32/Filecoder.NKD Ransomware Trojans are infused are:

  • By ways of phishing e-mails;
  • As a consequence of individual winding up on a resource that hosts a harmful software;

As soon as the Trojan is efficiently injected, it will certainly either cipher the data on the victim’s computer or avoid the gadget from working in an appropriate way – while additionally placing a ransom note that discusses the requirement for the targets to impact the repayment for the function of decrypting the papers or recovering the documents system back to the first condition. In most circumstances, the ransom note will come up when the customer reboots the PC after the system has actually currently been harmed.

Win32/Filecoder.NKD distribution networks.

In numerous corners of the world, Win32/Filecoder.NKD expands by jumps and also bounds. Nevertheless, the ransom notes and also methods of extorting the ransom money amount might vary depending upon particular regional (regional) setups. The ransom money notes and also methods of extorting the ransom quantity may differ depending on specific regional (local) setups.

Ransomware injection

For instance:

    Faulty alerts concerning unlicensed software program.

    In particular areas, the Trojans usually wrongfully report having actually detected some unlicensed applications enabled on the target’s device. The sharp then requires the customer to pay the ransom.

    Faulty declarations about illegal material.

    In nations where software application piracy is less prominent, this approach is not as reliable for the cyber frauds. Alternatively, the Win32/Filecoder.NKD popup alert may falsely declare to be originating from a law enforcement organization and will report having located child pornography or other unlawful data on the device.

    Win32/Filecoder.NKD popup alert might falsely assert to be acquiring from a legislation enforcement establishment and will report having situated youngster pornography or various other illegal information on the device. The alert will likewise contain a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 8D87C387
md5: 1ee2db707c77a1482111c6870b216c2a
name: 1EE2DB707C77A1482111C6870B216C2A.mlw
sha1: 8aac1aa56200fdcadc116c3af711e282cb24b079
sha256: 920ce0772b6dc9619d190416151dd8cc27efc6fd92c8b9c85d0c0468f75382bc
sha512: a5e26465854b3b568fa282c2dd377289adca7f0414e9a4cee33ff417e4b6f01faa0f76fd5275d621cfd2200d1c3ecb64e67e48757a7a744b10ec115acb6ed4cf
ssdeep: 6144:oTHEGciq6RflazcT2aK6zlffqJ0V7f+2hxzk41GZ6PLSmAr1CYjYHc:gHncloflohyXq2hxzZq2FE
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Filecoder.NKD also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
K7AntiVirusTrojan ( 005086421 )
Elasticmalicious (high confidence)
DrWebTrojan.Siggen7.10717
CynetMalicious (score: 100)
CylanceUnsafe
ZillyaTrojan.Filecoder.Win32.4852
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_90% (W)
AlibabaTrojan:Win32/Filecoder.db955902
K7GWTrojan ( 005086421 )
Cybereasonmalicious.07c77a
SymantecTrojan.Gen
ESET-NOD32Win32/Filecoder.NKD
APEXMalicious
AvastWin32:Rootkit-gen [Rtk]
KasperskyHEUR:Trojan.Win32.Generic
BitDefenderGen:Trojan.Brresmon.Gen.1
NANO-AntivirusTrojan.Win32.Kasidet.emoasi
MicroWorld-eScanGen:Trojan.Brresmon.Gen.1
TencentWin32.Trojan.Raas.Auto
Ad-AwareGen:Trojan.Brresmon.Gen.1
SophosMal/Generic-S
ComodoMalware@#3oapmtyy8l8bj
BitDefenderThetaGen:NN.ZexaF.34628.BuW@a8Ye3Egi
VIPRETrojan.Win32.Generic!BT
TrendMicroRansom_MATRIX.F117DB
McAfee-GW-EditionBehavesLike.Win32.Generic.gc
FireEyeGeneric.mg.1ee2db707c77a148
EmsisoftGen:Trojan.Brresmon.Gen.1 (B)
JiangminBackdoor.Androm.nsk
WebrootW32.Trojan.Gen
AviraHEUR/AGEN.1115884
KingsoftWin32.Troj.Gener.(kcloud)
MicrosoftTrojan:MSIL/Cryptor
AegisLabTrojan.Win32.Androm.toeF
GDataGen:Trojan.Brresmon.Gen.1
AhnLab-V3Malware/Win32.Generic.C1900841
Acronissuspicious
McAfeeGenericRXBE-GF!1EE2DB707C77
MAXmalware (ai score=83)
VBA32BScope.TrojanRansom.Troldesh
MalwarebytesSpyware.Ursnif
PandaTrj/GdSda.A
TrendMicro-HouseCallRansom_MATRIX.F117DB
RisingMalware.Skeeyah!8.E947 (CLOUD)
SentinelOneStatic AI – Malicious PE
MaxSecureTrojan.Malware.300983.susgen
FortinetW32/Kryptik.HDNI!tr
AVGWin32:Rootkit-gen [Rtk]
Paloaltogeneric.ml
Qihoo-360Win32/Rootkit.Generic.HwoC8a8A

How to remove Win32/Filecoder.NKD ransomware?

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.NKD 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/Filecoder.NKD you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

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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