Win32/Filecoder.NLK

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

What is Win32/Filecoder.NLK infection?

In this short article you will find regarding the meaning of Win32/Filecoder.NLK as well as its unfavorable impact on your computer. Such ransomware are a form of malware that is elaborated by online scams to require paying the ransom money by a sufferer.

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Most of the cases, Win32/Filecoder.NLK virus will advise its victims to start funds transfer for the function of neutralizing the changes that the Trojan infection has presented to the sufferer’s tool.

Win32/Filecoder.NLK Summary

These modifications can be as follows:

  • 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.
  • 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.
  • A process attempted to delay the analysis task.;
  • A process created a hidden window;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Attempts to delete volume shadow copies;
  • Exhibits possible ransomware file modification behavior;
  • Writes a potential ransom message to disk;
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Likely virus infection of existing system binary;
  • 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 files situated on the target’s hard drive — so the target can no more utilize the data;
  • Preventing regular access to the target’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Win32/Filecoder.NLK

The most regular networks where Win32/Filecoder.NLK Ransomware are injected are:

  • By means of phishing e-mails;
  • As a consequence of customer ending up on a resource that hosts a harmful software;

As soon as the Trojan is successfully infused, it will either cipher the data on the sufferer’s PC or protect against the device from operating in a correct fashion – while likewise positioning a ransom money note that states the requirement for the targets to effect the payment for the purpose of decrypting the files or recovering the data system back to the first condition. In most instances, the ransom note will come up when the customer restarts the COMPUTER after the system has actually currently been damaged.

Win32/Filecoder.NLK circulation networks.

In numerous edges of the globe, Win32/Filecoder.NLK grows by leaps as well as bounds. Nevertheless, the ransom notes as well as techniques of obtaining the ransom money amount might vary depending on specific neighborhood (regional) settings. The ransom money notes as well as techniques of obtaining the ransom amount might vary depending on specific regional (local) setups.

Ransomware injection

As an example:

    Faulty signals regarding unlicensed software.

    In certain areas, the Trojans commonly wrongfully report having actually detected some unlicensed applications allowed on the victim’s gadget. The alert after that demands the user to pay the ransom.

    Faulty declarations about illegal material.

    In countries where software application piracy is less preferred, this method is not as effective for the cyber fraudulences. Conversely, the Win32/Filecoder.NLK popup alert might incorrectly claim to be stemming from a police establishment and also will certainly report having situated child pornography or other illegal data on the device.

    Win32/Filecoder.NLK popup alert might incorrectly declare to be acquiring from a regulation enforcement establishment and also will certainly report having situated youngster porn or various other unlawful information on the gadget. The alert will in a similar way consist of a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 54BADD56
md5: 78ca4efe15d4e791d0a668f6fe06a1e9
name: 78CA4EFE15D4E791D0A668F6FE06A1E9.mlw
sha1: 63a62a9bb15d27ed8279844a1a9b2c3d2c8c871c
sha256: 212c29fe3acab032b3c959609822841acfe0980f65959df3743fc8d8624ebc53
sha512: f6c47e02b888514952f6633e6f9054b6890794b727ed057a349989c0684d33d755d93e779d83a6c21802f07fc01d9e87c38ed84658820950378126f33bf91009
ssdeep: 6144:2fTUUU5c6x3IfUme/xLyCM7K9e+g29o9cMAbbaqnBS6mWnc:0Ttgx3eUme/xLv6K829KQmh
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (c) 2006-2014 Open Source Software community LGPL
InternalName: Lyons Send
FileVersion: 8.6.4.8
CompanyName: Open Source Software community LGPL
FileDescription: Notifyall Bfn Silkscreen Paperwork Guarded
LegalTrademarks: Copyright (c) 2006-2014 Open Source Software community LGPL
Comments: Notifyall Bfn Silkscreen Paperwork Guarded
ProductName: Lyons Send
Languages: English
ProductVersion: 8.6.4.8
PrivateBuild: 8.6.4.8
OriginalFilename: Lyons Send.exe
Translation: 0x0409 0x04b0

Win32/Filecoder.NLK also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
K7AntiVirusTrojan ( 0050d8431 )
Elasticmalicious (high confidence)
DrWebTrojan.PWS.Steam.13902
CynetMalicious (score: 100)
ALYacTrojan.Ransom.FileCryptor
CylanceUnsafe
ZillyaTrojan.Deshacop.Win32.959
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (D)
AlibabaRansom:Win32/Genasom.ali1000102
K7GWTrojan ( 0050d8431 )
Cybereasonmalicious.e15d4e
CyrenW32/Trojan.KFUS-4493
SymantecML.Attribute.HighConfidence
ESET-NOD32Win32/Filecoder.NLK
APEXMalicious
AvastWin32:Malware-gen
KasperskyTrojan.Win32.Deshacop.fov
BitDefenderTrojan.GenericKD.5082152
NANO-AntivirusTrojan.Win32.Deshacop.epfhzu
MicroWorld-eScanTrojan.GenericKD.5082152
TencentWin32.Trojan.Raas.Auto
Ad-AwareTrojan.GenericKD.5082152
ComodoMalware@#f0osdchhjyq9
BitDefenderThetaGen:NN.ZexaF.34608.tq0@aSdkjdni
VIPRETrojan.Win32.Generic!BT
TrendMicroRansom_FAKEGLOBE.L
McAfee-GW-EditionRansomware-GAG!78CA4EFE15D4
FireEyeGeneric.mg.78ca4efe15d4e791
EmsisoftTrojan.GenericKD.5082152 (B)
SentinelOneStatic AI – Malicious PE
WebrootW32.Trojan.Gen
AviraTR/Crypt.ZPACK.Gen7
MicrosoftRansom:Win32/FileCryptor
ArcabitTrojan.Generic.D4D8C28
AegisLabTrojan.Multi.Generic.4!c
GDataTrojan.GenericKD.5082152
AhnLab-V3Win-Trojan/Sagecrypt.Gen
Acronissuspicious
McAfeeRansomware-GAG!78CA4EFE15D4
MAXmalware (ai score=100)
VBA32BScope.TrojanSpy.Ursnif
MalwarebytesMachineLearning/Anomalous.95%
PandaTrj/CI.A
TrendMicro-HouseCallRansom_FAKEGLOBE.L
RisingRansom.FileCryptor!8.1A7 (CLOUD)
YandexTrojan.Deshacop!r0qddBf0n0g
IkarusTrojan.Inject
eGambitUnsafe.AI_Score_99%
FortinetW32/Deshacop.FOV!tr
AVGWin32:Malware-gen
Paloaltogeneric.ml
Qihoo-360Win32/Trojan.7c4

How to remove Win32/Filecoder.NLK 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/Filecoder.NLK 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.NLK 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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