Win32/Kryptik.FVKU

Written by Robert Bailey

What is Win32/Kryptik.FVKU infection?

In this post you will find concerning the meaning of Win32/Kryptik.FVKU as well as its negative effect on your computer system. Such ransomware are a type of malware that is specified by on the internet fraudulences to demand paying the ransom money by a target.

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In the majority of the instances, Win32/Kryptik.FVKU ransomware will certainly instruct its victims to launch funds transfer for the function of counteracting the amendments that the Trojan infection has actually presented to the sufferer’s device.

Win32/Kryptik.FVKU 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.
  • 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.
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • 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.

  • 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;
  • Checks for the presence of known windows from debuggers and forensic tools;
  • 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.
  • Creates a copy of itself;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the papers situated on the target’s disk drive — so the sufferer can no more make use of the data;
  • Preventing regular accessibility to the target’s workstation;

Win32/Kryptik.FVKU

The most typical networks whereby Win32/Kryptik.FVKU Trojans are infused are:

  • By ways of phishing emails;
  • As an effect of customer winding up on a resource that holds a destructive software application;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the sufferer’s PC or stop the tool from functioning in a correct fashion – while also putting a ransom note that mentions the requirement for the targets to impact the repayment for the objective of decrypting the records or restoring the data system back to the preliminary condition. In most instances, the ransom money note will turn up when the client restarts the PC after the system has actually currently been damaged.

Win32/Kryptik.FVKU circulation channels.

In various edges of the globe, Win32/Kryptik.FVKU grows by leaps as well as bounds. However, the ransom money notes and also tricks of obtaining the ransom amount may vary relying on certain local (regional) settings. The ransom money notes as well as methods of extorting the ransom quantity might vary depending on certain local (local) settings.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software program.

    In certain locations, the Trojans frequently wrongfully report having actually detected some unlicensed applications enabled on the victim’s gadget. The sharp after that requires the user to pay the ransom.

    Faulty declarations about illegal material.

    In nations where software application piracy is much less popular, this approach is not as reliable for the cyber scams. Additionally, the Win32/Kryptik.FVKU popup alert may wrongly claim to be deriving from a law enforcement institution and will certainly report having located child porn or other illegal information on the device.

    Win32/Kryptik.FVKU popup alert may wrongly claim to be acquiring from a regulation enforcement establishment and will report having situated child porn or various other illegal data on the gadget. The alert will likewise consist of a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: FD9A8165
md5: a29d62f577e45c758a5195b84d935632
name: A29D62F577E45C758A5195B84D935632.mlw
sha1: 25a93b9e8a5b981c1ca9744c4201e041997418fc
sha256: 535d2419449db189e1675886bbc9d9ffc740b1c0927e51cc0640fe13d62743c4
sha512: 4870a83b58bc73726b675e937a956ff19e2f461d3107dbdb21a263e5cf527fc5a1d46350863b3e8e5726736d41faa6956c385ad8b1da7cead475c28ae2dadece
ssdeep: 6144:+WAjoLnSq4HAhn/xBCh8hw2XaAavbQ+F9zqVC2YUEkhxiYXyM:+WcoLnl4HAh/xBCh8hBq6q24khu
type: PE32 executable (GUI) Intel 80386 system file, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.FVKU also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware2
K7AntiVirusTrojan ( 0056e9301 )
Elasticmalicious (high confidence)
DrWebTrojan.Encoder.3953
CynetMalicious (score: 100)
CylanceUnsafe
ZillyaTrojan.Kryptik.Win32.1509696
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (D)
AlibabaRansom:Win32/Crusis.0596de59
K7GWTrojan ( 0056e9301 )
Cybereasonmalicious.577e45
SymantecML.Attribute.HighConfidence
ESET-NOD32a variant of Win32/Kryptik.FVKU
APEXMalicious
AvastWin32:Malware-gen
KasperskyTrojan-Ransom.Win32.Crusis.bqs
BitDefenderGen:Variant.Ursu.22844
NANO-AntivirusTrojan.Win32.Encoder.evgras
MicroWorld-eScanGen:Variant.Ursu.22844
TencentWin32.Trojan.Raas.Auto
Ad-AwareGen:Variant.Ursu.22844
SophosMal/Generic-S
ComodoMalware@#1aoryxwd5ogth
BitDefenderThetaGen:NN.ZexaF.34670.uuW@aGYYdyii
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionBehavesLike.Win32.Trojan.fh
FireEyeGeneric.mg.a29d62f577e45c75
EmsisoftGen:Variant.Ursu.22844 (B)
SentinelOneStatic AI – Suspicious PE
JiangminTrojan.Crusis.wr
AviraHEUR/AGEN.1128642
Antiy-AVLTrojan/Win32.TSGeneric
ArcabitTrojan.Ursu.D593C
AegisLabTrojan.Win32.Generic.4!c
ZoneAlarmTrojan-Ransom.Win32.Crusis.bqs
MicrosoftTrojan:Win32/Tiggre!rfn
AhnLab-V3Win-Trojan/CTBLocker.Gen
Acronissuspicious
McAfeeArtemis!A29D62F577E4
MAXmalware (ai score=100)
VBA32BScope.Trojan.Reconyc
MalwarebytesGeneric.Malware/Suspicious
PandaTrj/CI.A
RisingRansom.Crusis!8.5724 (CLOUD)
IkarusTrojan-Ransom.GandCrab
FortinetW32/Kryptik.FOQJ!tr
AVGWin32:Malware-gen
Paloaltogeneric.ml
Qihoo-360Win32/Ransom.CrySiS.HwoCEpsA

How to remove Win32/Kryptik.FVKU 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/Kryptik.FVKU 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Win32/Kryptik.FVKU 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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