Win32/Kryptik.FWJX

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

What is Win32/Kryptik.FWJX infection?

In this short article you will locate about the definition of Win32/Kryptik.FWJX and also its unfavorable effect on your computer system. Such ransomware are a form of malware that is specified by online fraudulences to require paying the ransom money by a sufferer.

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Most of the instances, Win32/Kryptik.FWJX infection will instruct its sufferers to initiate funds move for the function of reducing the effects of the changes that the Trojan infection has actually introduced to the victim’s gadget.

Win32/Kryptik.FWJX Summary

These adjustments can be as follows:

  • Presents an Authenticode digital signature;
  • 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.
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • A process created a hidden window;
  • Unconventionial binary language: Portuguese (Brazil);
  • Unconventionial language used in binary resources: Portuguese (Brazilian);
  • 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;
  • 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.
  • 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.
  • Likely virus infection of existing system binary;
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the target’s hard drive — so the sufferer can no longer utilize the information;
  • Preventing normal accessibility 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.

Win32/Kryptik.FWJX

One of the most common networks through which Win32/Kryptik.FWJX are injected are:

  • By ways of phishing e-mails;
  • As a repercussion of user ending up on a source that hosts a destructive software application;

As quickly as the Trojan is successfully injected, it will certainly either cipher the data on the sufferer’s PC or avoid the gadget from working in an appropriate way – while likewise placing a ransom money note that points out the demand for the sufferers to impact the repayment for the purpose of decrypting the files or recovering the documents system back to the first problem. In a lot of instances, the ransom money note will certainly show up when the customer restarts the PC after the system has actually currently been damaged.

Win32/Kryptik.FWJX distribution networks.

In various edges of the globe, Win32/Kryptik.FWJX grows by leaps and bounds. Nonetheless, the ransom money notes and methods of obtaining the ransom amount might differ relying on particular neighborhood (regional) setups. The ransom notes and tricks of obtaining the ransom quantity may differ depending on particular regional (regional) settings.

Ransomware injection

For example:

    Faulty informs about unlicensed software application.

    In specific locations, the Trojans typically wrongfully report having spotted some unlicensed applications made it possible for on the target’s device. The alert then demands the customer to pay the ransom.

    Faulty declarations about unlawful material.

    In nations where software piracy is much less preferred, this technique is not as effective for the cyber fraudulences. Additionally, the Win32/Kryptik.FWJX popup alert may wrongly claim to be deriving from a law enforcement establishment and also will report having located kid pornography or other prohibited information on the gadget.

    Win32/Kryptik.FWJX popup alert may incorrectly assert to be obtaining from a legislation enforcement institution and will report having located youngster pornography or various other unlawful data on the device. The alert will likewise contain a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 54B4B86E
md5: 36324c10202f2c395e29007afc17a0c5
name: 36324C10202F2C395E29007AFC17A0C5.mlw
sha1: ef628a3713d9e3e62af9685aeb8cac2f6dae532a
sha256: 46e00958d58f176ba6c328d357b2283b4db5a0f4f8009f9279361c8018925449
sha512: 6aee767175c29b49af629001f54753341ffb2555523f156e65ce48c1192705fc08f350fd15023527947afa8b24130f1e0c360b5886eb259b6cac1226e78e08a8
ssdeep: 3072:X030XCIscLlj+ck45L8UQtYMQFpJU6EjhxFpPv5f3uPGwrKX3ZGC:Xje2jQCMQLJ56xrX5GPjoX
type: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive

Version Info:

LegalCopyright: Copyright 2014 SoftwareOfUse, Inc.
FileVersion: 7.3.2
CompanyName: SoftwareOfUse, Inc.
Comments: http://www.SoftwareOfUse.com
ProductName: Network Configurator
ProductVersion: 7.3.2
FileDescription: Network Configurator
Translation: 0x0416 0x04e4

Win32/Kryptik.FWJX also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware2
K7AntiVirusTrojan ( 0053f8c51 )
DrWebTrojan.PWS.Steam.14874
ALYacTrojan.NSIS.Ransom.AQ
CylanceUnsafe
ZillyaTrojan.Purgen.Win32.82
CrowdStrikewin/malicious_confidence_90% (W)
AlibabaTrojan:Win32/Predator.c89dba2e
K7GWTrojan ( 0053f8c51 )
Cybereasonmalicious.0202f2
CyrenW32/Skeeyah.JRFA-3838
SymantecDownloader
ESET-NOD32a variant of Win32/Kryptik.FWJX
ZonerTrojan.Win32.63420
AvastWin32:NSISDropper-B [Drp]
KasperskyHEUR:Trojan-Ransom.Win32.Encoder.gen
BitDefenderTrojan.NSIS.Ransom.AQ
NANO-AntivirusTrojan.Win32.Encoder.fjnqse
MicroWorld-eScanTrojan.NSIS.Ransom.AQ
TencentWin32.Trojan.Encoder.Ligo
Ad-AwareTrojan.NSIS.Ransom.AQ
SophosMal/Generic-S
ComodoMalware@#1roxwb26wyvue
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionRansom-CryptXXX!36324C10202F
FireEyeTrojan.NSIS.Ransom.AQ
EmsisoftTrojan.NSIS.Ransom.AQ (B)
AviraTR/AD.Petya.hlwrr
MicrosoftTrojan:Win32/Predator.GJ!MTB
AegisLabTrojan.Win32.Encoder.4!c
GDataTrojan.NSIS.Ransom.AQ
McAfeeRansom-CryptXXX!36324C10202F
MAXmalware (ai score=88)
VBA32Trojan-Ransom.Purgen
PandaTrj/CI.A
FortinetW32/Injector.XG!tr
AVGWin32:NSISDropper-B [Drp]
Paloaltogeneric.ml

How to remove Win32/Kryptik.FWJX 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/Kryptik.FWJX 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/Kryptik.FWJX 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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