Win32/KillFiles.NJM

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

What is Win32/KillFiles.NJM infection?

In this article you will discover regarding the interpretation of Win32/KillFiles.NJM as well as its negative impact on your computer. Such ransomware are a type of malware that is elaborated by on the internet fraudulences to demand paying the ransom money by a victim.

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In the majority of the cases, Win32/KillFiles.NJM infection will advise its victims to start funds transfer for the purpose of reducing the effects of the changes that the Trojan infection has actually presented to the sufferer’s device.

Win32/KillFiles.NJM Summary

These modifications can be as adheres to:

  • 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.
  • 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.
  • Uses Windows utilities for basic functionality;
  • 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
  • Exhibits possible ransomware file modification behavior;
  • 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 sufferer’s hard disk — so the victim can no longer use the information;
  • Preventing routine accessibility 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/KillFiles.NJM

The most typical networks through which Win32/KillFiles.NJM Trojans are infused are:

  • By ways of phishing e-mails;
  • As a consequence of individual winding up on a source that hosts a malicious software program;

As quickly as the Trojan is efficiently infused, it will certainly either cipher the data on the target’s computer or stop the tool from functioning in a correct way – while likewise putting a ransom note that states the requirement for the victims to impact the settlement for the objective of decrypting the papers or restoring the documents system back to the preliminary problem. In a lot of instances, the ransom money note will certainly come up when the client reboots the PC after the system has already been damaged.

Win32/KillFiles.NJM distribution networks.

In numerous edges of the world, Win32/KillFiles.NJM grows by leaps as well as bounds. Nonetheless, the ransom money notes as well as tricks of obtaining the ransom quantity might vary depending on particular regional (regional) settings. The ransom money notes as well as tricks of extorting the ransom amount may vary depending on certain regional (regional) setups.

Ransomware injection

For instance:

    Faulty alerts concerning unlicensed software application.

    In specific areas, the Trojans frequently wrongfully report having actually detected some unlicensed applications enabled on the sufferer’s tool. The sharp after that demands the customer to pay the ransom.

    Faulty declarations about illegal web content.

    In nations where software application piracy is much less prominent, this method is not as efficient for the cyber scams. Alternatively, the Win32/KillFiles.NJM popup alert might incorrectly declare to be deriving from a police establishment and will report having situated youngster pornography or other unlawful information on the gadget.

    Win32/KillFiles.NJM popup alert may wrongly declare to be obtaining from a legislation enforcement organization and also will report having situated kid pornography or other prohibited information on the gadget. The alert will similarly contain a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: B139D844
md5: 2c83176080a36484602e8d64071c0e56
name: 2C83176080A36484602E8D64071C0E56.mlw
sha1: b80c98e0202072a2f331a3b1496ddd35cb591e1e
sha256: 531dc7a6f85e97edf062accc98e4accfdcb95692927cbaa3035accf46af176e8
sha512: 61957d9602ef0df80f4b70b8e75117864a6a65246f6c53a99f38227a4a119c60afd03c071c8fcba66a50779452c4deb97304180ff59d0cc125025104e24fca25
ssdeep: 1536:/XeuZAXhfpLny2KJsRNf9NXoCZQo9xtL4pb8cuZN:f7Axfhy2KWRJ9l/9Epb8NN
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0804 0x04b0
ProductVersion: 7.00
InternalName: x5de5x7a0b1
FileVersion: 7.00
OriginalFilename: x5de5x7a0b1.exe
ProductName: update

Win32/KillFiles.NJM also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
McAfeeW32/Generic.p.d
CylanceUnsafe
K7GWTrojan ( 0057900e1 )
SymantecML.Attribute.HighConfidence
ESET-NOD32a variant of Win32/KillFiles.NJM
APEXMalicious
AvastWin32:Trojan-gen
KasperskyTrojan-Ransom.Win32.Gen.aaoc
F-SecureTrojan.TR/KillFiles.itpsz
DrWebTrojan.Siggen12.26317
McAfee-GW-EditionW32/Generic.p.d
SophosMal/Generic-S
SentinelOneStatic AI – Malicious PE
AviraTR/KillFiles.itpsz
ZoneAlarmTrojan-Ransom.Win32.Gen.aaoc
GDataWin32.Trojan.Agent.SH5AK7
CynetMalicious (score: 85)
MalwarebytesMachineLearning/Anomalous.94%
FortinetW32/KillFiles.NJM!tr
AVGWin32:Trojan-gen
CrowdStrikewin/malicious_confidence_70% (W)

How to remove Win32/KillFiles.NJM 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 Win32/KillFiles.NJM 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/KillFiles.NJM 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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