Win32/Kryptik.GKTT

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

What is Win32/Kryptik.GKTT infection?

In this post you will certainly discover about the definition of Win32/Kryptik.GKTT and its adverse influence on your computer. Such ransomware are a kind of malware that is specified by on-line scams to require paying the ransom by a victim.

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Most of the situations, Win32/Kryptik.GKTT virus will certainly advise its targets to launch funds transfer for the function of neutralizing the amendments that the Trojan infection has introduced to the target’s device.

Win32/Kryptik.GKTT Summary

These alterations 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.
  • Compression (or decompression);
  • 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.;
  • 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.
  • The executable is compressed using UPX;
  • Attempts to delete volume shadow copies;
  • 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
  • Creates a copy of itself;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the papers situated on the sufferer’s hard drive — so the target can no longer utilize the data;
  • 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.GKTT

One of the most normal channels where Win32/Kryptik.GKTT are injected are:

  • By means of phishing emails;
  • As a consequence of individual winding up on a source that holds a harmful software program;

As soon as the Trojan is successfully injected, it will certainly either cipher the information on the target’s PC or avoid the gadget from working in a proper fashion – while likewise putting a ransom money note that mentions the demand for the victims to impact the payment for the objective of decrypting the papers or recovering the file system back to the initial problem. In many circumstances, the ransom money note will turn up when the customer restarts the COMPUTER after the system has actually already been damaged.

Win32/Kryptik.GKTT distribution channels.

In different edges of the world, Win32/Kryptik.GKTT grows by leaps and bounds. However, the ransom notes and tricks of obtaining the ransom quantity may vary depending upon certain local (regional) settings. The ransom notes and tricks of extorting the ransom money amount might vary depending on specific neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software program.

    In certain areas, the Trojans often wrongfully report having discovered some unlicensed applications made it possible for on the victim’s gadget. The sharp after that demands the user to pay the ransom.

    Faulty statements about prohibited material.

    In nations where software program piracy is much less preferred, this approach is not as effective for the cyber frauds. Alternatively, the Win32/Kryptik.GKTT popup alert may falsely declare to be stemming from a police organization and will certainly report having situated youngster porn or other unlawful data on the tool.

    Win32/Kryptik.GKTT popup alert may falsely claim to be deriving from a law enforcement organization and will certainly report having located youngster pornography or other unlawful information on the gadget. The alert will similarly include a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 47417F3D
md5: 6144d17ff15e7172278f8018c7e035d5
name: 6144D17FF15E7172278F8018C7E035D5.mlw
sha1: 4ec66cc6672dd3182a02e2d701ca280bb6955c49
sha256: 7af7729649eff70e89ee1063042ab933f9cd9a6adcefab2a8d71766251e82e21
sha512: 158826fc20fd8e6cc65d5e9cddfce60c7d9fca942dab996f838748497f03513c6ee48651162f4ee30c75825a169a6237070225d922adcc100747fd6f1789715a
ssdeep: 12288:Wqf8SFWDfDnPDyyZTA6wQddSZK4H5RbyQH+CGe2tr8vA/t+eNM:Wqf8Fvd3dd+5hH+rtQIt+i
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: 2006-2014 (c) RimArts Inc.
CompanyName: RimArts Inc.
FileDescription: Ispostback Mitch
ProductName: Applies Compare
ProductVersion: 5.5.4.3
PrivateBuild: 5.5.4.3
OriginalFilename: Applies Compare
Translation: 0x0409 0x04b0

Win32/Kryptik.GKTT also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
K7AntiVirusTrojan ( 0053c7111 )
Elasticmalicious (high confidence)
DrWebTrojan.Encoder.3953
CynetMalicious (score: 100)
ALYacGen:Variant.Ransom.Dharma.42
CylanceUnsafe
ZillyaAdware.Crusis.Win32.3
SangforTrojan.Win32.Save.a
AlibabaRansom:Win32/Crusis.3e3f6c42
K7GWTrojan ( 0053c7111 )
Cybereasonmalicious.ff15e7
SymantecDownloader
ESET-NOD32a variant of Win32/Kryptik.GKTT
APEXMalicious
AvastWin32:Malware-gen
KasperskyTrojan-Ransom.Win32.Crusis.csi
BitDefenderGen:Variant.Ransom.Dharma.42
NANO-AntivirusTrojan.Win32.Encoder.fhudft
MicroWorld-eScanGen:Variant.Ransom.Dharma.42
TencentWin32.Trojan.Crusis.Wlpc
Ad-AwareGen:Variant.Ransom.Dharma.42
SophosMal/Generic-S
ComodoMalware@#1n24x8ovxsbs1
BitDefenderThetaGen:NN.ZexaF.34608.XmKfaeMlGHji
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionBehavesLike.Win32.Dropper.bc
FireEyeGeneric.mg.6144d17ff15e7172
EmsisoftGen:Variant.Ransom.Dharma.42 (B)
WebrootTrojan.Dropper.Gen
AviraTR/AD.Crysis.njygp
eGambitUnsafe.AI_Score_83%
MicrosoftTrojan:Win32/Occamy.C
ArcabitTrojan.Ransom.Dharma.42
AegisLabTrojan.Win32.Crusis.4!c
GDataGen:Variant.Ransom.Dharma.42
AhnLab-V3Malware/Win32.Generic.C4091288
McAfeeArtemis!6144D17FF15E
VBA32BScope.TrojanRansom.Foreign
MalwarebytesMalware.Heuristic.1003
PandaTrj/GdSda.A
RisingRansom.Crusis!8.5724 (CLOUD)
IkarusTrojan-Ransom.GandCrab
FortinetW32/Kryptik.HAOZ!tr.ransom
AVGWin32:Malware-gen
Paloaltogeneric.ml
Qihoo-360Win32/Ransom.CrySiS.HgIASOUA

How to remove Win32/Kryptik.GKTT 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.GKTT 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.GKTT 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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