Win32/Kryptik.FWSF

What is Win32/Kryptik.FWSF infection?

In this post you will certainly find about the definition of Win32/Kryptik.FWSF and also its negative impact on your computer system. Such ransomware are a type of malware that is specified by online frauds to require paying the ransom money by a victim.

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Most of the instances, Win32/Kryptik.FWSF ransomware will certainly instruct its sufferers to launch funds move for the function of counteracting the changes that the Trojan infection has presented to the target’s device.

Win32/Kryptik.FWSF 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.
  • 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;
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • Uses Windows utilities for basic functionality;
  • 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
  • Attempts to access Bitcoin/ALTCoin wallets;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • 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 located on the victim’s hard disk — so the target can no longer use the information;
  • Preventing normal 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/Kryptik.FWSF

One of the most normal channels through which Win32/Kryptik.FWSF Ransomware Trojans are infused are:

  • By ways of phishing e-mails;
  • As an effect of user winding up on a resource that organizes a malicious software;

As quickly as the Trojan is effectively injected, it will certainly either cipher the data on the sufferer’s computer or stop the device from operating in a proper fashion – while additionally placing a ransom money note that mentions the demand for the sufferers to effect the payment for the function of decrypting the papers or bring back the file system back to the initial condition. In many circumstances, the ransom note will certainly show up when the customer reboots the COMPUTER after the system has already been harmed.

Win32/Kryptik.FWSF distribution networks.

In different corners of the world, Win32/Kryptik.FWSF grows by jumps and bounds. However, the ransom notes and techniques of obtaining the ransom amount might differ depending upon specific neighborhood (regional) settings. The ransom notes and tricks of extorting the ransom money amount might differ depending on specific neighborhood (local) setups.

Ransomware injection

As an example:

    Faulty informs about unlicensed software program.

    In particular areas, the Trojans typically wrongfully report having actually identified some unlicensed applications allowed on the sufferer’s device. The sharp after that demands the user to pay the ransom.

    Faulty statements about prohibited content.

    In nations where software program piracy is much less prominent, this approach is not as effective for the cyber scams. Additionally, the Win32/Kryptik.FWSF popup alert may falsely claim to be stemming from a law enforcement organization and also will certainly report having located child pornography or various other prohibited information on the device.

    Win32/Kryptik.FWSF popup alert may incorrectly declare to be acquiring from a legislation enforcement institution and also will certainly report having located child porn or other unlawful data on the tool. The alert will likewise contain a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: AB2FE04E
md5: ff28b889febc5626a4cae892afa7702e
name: FF28B889FEBC5626A4CAE892AFA7702E.mlw
sha1: 3117201d3e8a3faee0ee48c591c6c3efd071e02e
sha256: cfa4da32b1b5920f5aa20ed16864ec31323ead68abb0b361eeb27e93c27be0a7
sha512: fcae9445231ca787a91fbb099072b401b429e575731738712228fa9ccb2663a0abbc275a22ce624ba3eddf7b687c782fe8cc411b4b7a24bfda8f6e405268cf72
ssdeep: 12288:SStLzU05S6yOckrQjvoPaP888888888888W88888888888xJaD:SSVLHckrQjvh3Y
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright xa9 2017
FileVersion: 1.9.1.70
CompanyName: PCWinSoft Software
LegalTrademarks: PCWinSoft (tm)
Comments: PCWinSoft Software
ProductName: 1AVMonitor
ProductVersion: 1.9.1.70
FileDescription: 1AVMonitor
Translation: 0x0000 0x04b0

Win32/Kryptik.FWSF also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 00517c481 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.4691
ClamAV Win.Ransomware.Cerber-9779202-1
CAT-QuickHeal Ransom.Cerber.A4
ALYac Trojan.Mint.Zamg.O
Cylance Unsafe
Zillya Trojan.Zerber.Win32.3707
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
BitDefender Trojan.Mint.Zamg.O
K7GW Trojan ( 00517c481 )
Cybereason malicious.9febc5
Cyren W32/Zerber.E.gen!Eldorado
Symantec Packed.Generic.459
ESET-NOD32 a variant of Win32/Kryptik.FWSF
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Ransom:Win32/Cerber.7ff10421
NANO-Antivirus Trojan.Win32.Kryptik.esulmk
MicroWorld-eScan Trojan.Mint.Zamg.O
Ad-Aware Trojan.Mint.Zamg.O
Sophos ML/PE-A + Mal/Cerber-K
Comodo TrojWare.Win32.Bulta.GR@7k46qi
BitDefenderTheta Gen:NN.ZexaF.34628.Iq0@a8GMJfij
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_HPCERBER.SMALY5B
FireEye Generic.mg.ff28b889febc5626
Emsisoft Trojan.Mint.Zamg.O (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Zerber.dcu
Avira HEUR/AGEN.1106820
eGambit Unsafe.AI_Score_99%
Microsoft Ransom:Win32/Cerber
Arcabit Trojan.Mint.Zamg.O
AegisLab Trojan.Win32.Zerber.j!c
GData Trojan.Mint.Zamg.O
AhnLab-V3 Win-Trojan/RansomCrypt.Gen
Acronis suspicious
McAfee Ransomware-GCQ!FF28B889FEBC
MAX malware (ai score=100)
VBA32 Trojan-Ransom.Zerber
Malwarebytes Malware.AI.1479990419
TrendMicro-HouseCall Ransom_HPCERBER.SMALY5B
Tencent Malware.Win32.Gencirc.10b614a5
Ikarus Trojan.Crypt
Fortinet W32/Zamg.O!tr
Panda Trj/Genetic.gen
Qihoo-360 Win32/Ransom.Generic.HxQBbiMA

How to remove Win32/Kryptik.FWSF 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/Kryptik.FWSF 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.FWSF 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/products/

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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