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

What is Win32/Kryptik.GTKA infection?

In this short article you will certainly find about the definition of Win32/Kryptik.GTKA and also its unfavorable impact on your computer. Such ransomware are a kind of malware that is clarified by online frauds to require paying the ransom money by a target.

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In the majority of the cases, Win32/Kryptik.GTKA ransomware will certainly advise its sufferers to launch funds transfer for the purpose of neutralizing the modifications that the Trojan infection has actually presented to the target’s tool.

Win32/Kryptik.GTKA 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.
  • 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.
  • A process created a hidden window;
  • 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;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • 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 files situated on the target’s hard disk drive — so the target can no longer make use of the data;
  • Preventing routine 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.
Similar behavior
Related domains Ransom:Win32/GandCrab.d581a56f Ransom:Win32/GandCrab.d581a56f Ransom:Win32/GandCrab.d581a56f


The most normal networks through which Win32/Kryptik.GTKA Ransomware Trojans are infused are:

  • By methods of phishing emails;
  • As a consequence of user winding up on a source that hosts a destructive software;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the target’s PC or protect against the tool from working in an appropriate manner – while also placing a ransom money note that mentions the need for the sufferers to effect the payment for the purpose of decrypting the documents or recovering the file system back to the preliminary problem. In a lot of circumstances, the ransom money note will certainly show up when the customer restarts the COMPUTER after the system has already been damaged.

Win32/Kryptik.GTKA circulation channels.

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

Ransomware injection

For instance:

    Faulty informs regarding unlicensed software application.

    In particular areas, the Trojans commonly wrongfully report having detected some unlicensed applications allowed on the victim’s tool. The alert then demands the individual to pay the ransom money.

    Faulty declarations concerning illegal material.

    In nations where software program piracy is less preferred, this approach is not as reliable for the cyber frauds. Additionally, the Win32/Kryptik.GTKA popup alert may incorrectly declare to be stemming from a law enforcement organization and also will certainly report having located youngster pornography or various other illegal information on the device.

    Win32/Kryptik.GTKA popup alert may incorrectly claim to be deriving from a regulation enforcement establishment and will report having situated child porn or various other illegal data on the tool. The alert will in a similar way have a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: F675A417
md5: bc93f37064bb43d6ea5dcad70c32d232
name: BC93F37064BB43D6EA5DCAD70C32D232.mlw
sha1: 50d47e2423e5fee25f3f3889adf7d4cb78622ee0
sha256: e15652a6c3cb2d856f53283e122933e9f8ec734621ba5f7c3296d19af4aaed0f
sha512: 3cba7837704a53ff1000bdb08a27c180a054734bd593bad639257c6c98a57ea719bed351809a3814bc996129eeaf06aed6f08e5dabe2a40d388a0d4cc158681c
ssdeep: 3072:j/VmWijC4XqriEjDpN7dQyXifcgHxbroT9A8JigTqh+LRgB5D+2dF9t7Oxp4Duy:j/X8CVZV+zREAETyr8Mb
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GTKA also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.BRMon.Gen.4
ALYac Trojan.BRMon.Gen.4
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
K7AntiVirus Trojan ( 005502091 )
BitDefender Trojan.BRMon.Gen.4
K7GW Trojan ( 005502091 )
CrowdStrike win/malicious_confidence_80% (D)
Symantec Packed.Generic.525
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Ransom:Win32/GandCrab.d581a56f
NANO-Antivirus Trojan.Win32.SelfDel.fqnwcy
AegisLab Trojan.Win32.SelfDel.4!c
Rising Trojan.Fuery!8.EAFB (CLOUD)
Ad-Aware Trojan.BRMon.Gen.4
Sophos Mal/Generic-S + Mal/GandCrab-G
Comodo TrojWare.Win32.Wacatac.AA@87gpz7
F-Secure Heuristic.HEUR/AGEN.1132006
DrWeb Trojan.DownLoader28.25643
Zillya Trojan.SelfDel.Win32.62810
McAfee-GW-Edition GenericRXHS-RX!BC93F37064BB
Emsisoft Trojan.BRMon.Gen.4 (B)
Ikarus Trojan.Win32.Krypt
Avira HEUR/AGEN.1132006
eGambit PE.Heur.InvalidSig
Antiy-AVL Trojan/Win32.Fuery
Microsoft Ransom:Win32/GandCrab.AE!MTB
Arcabit Trojan.BRMon.Gen.4
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.BRMon.Gen.4
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Ransom.R272490
Acronis suspicious
McAfee GenericRXHS-RX!BC93F37064BB
VBA32 BScope.Trojan.Pushdo
Malwarebytes Generic.Malware/Suspicious
Panda Trj/GdSda.A
ESET-NOD32 a variant of Win32/Kryptik.GTKA
Tencent Win32.Trojan.Selfdel.Pijr
Yandex Trojan.PWS.Phpw!ncWgD73NlZ8
SentinelOne Static AI – Malicious PE
MaxSecure Ransomeware.GandCrypt.Gen
Fortinet W32/GenKryptik.DQHN!tr
BitDefenderTheta Gen:NN.ZexaF.34590.nuX@aG6BL1p
AVG Win32:Trojan-gen
Qihoo-360 Win32/Ransom.GandCrab.HwoC3iAA

How to remove Win32/Kryptik.GTKA 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.GTKA 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.GTKA you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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