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

What is Win32/Kryptik.GMYV infection?

In this post you will certainly discover concerning the meaning of Win32/Kryptik.GMYV as well as its negative influence on your computer. Such ransomware are a type of malware that is elaborated by online fraudulences to require paying the ransom money by a target.

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Most of the situations, Win32/Kryptik.GMYV virus will advise its targets to start funds transfer for the objective of counteracting the modifications that the Trojan infection has introduced to the target’s gadget.

Win32/Kryptik.GMYV 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);
  • Attempts to connect to a dead IP:Port (2 unique times);
  • 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;
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Detects Sandboxie through the presence of a library;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • A system process is generating network traffic likely as a result of process injection;
  • 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 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.
  • Checks the presence of disk drives in the registry, possibly for anti-virtualization;
  • Creates a copy of itself;
  • Ciphering the papers located on the victim’s hard disk — so the victim can no longer use the data;
  • Preventing normal accessibility to the victim’s workstation;
Similar behavior
Related domains Gen:Variant.Ransom.GandCrab.2018


One of the most regular networks through which Win32/Kryptik.GMYV Trojans are infused are:

  • By means of phishing emails;
  • As a consequence of individual winding up on a resource that organizes a malicious software;

As quickly as the Trojan is successfully infused, it will certainly either cipher the information on the sufferer’s computer or avoid the device from working in an appropriate fashion – while also positioning a ransom money note that states the demand for the sufferers to impact the payment for the function of decrypting the files or bring back the documents system back to the first condition. In a lot of circumstances, the ransom note will come up when the client reboots the PC after the system has already been damaged.

Win32/Kryptik.GMYV circulation networks.

In numerous edges of the world, Win32/Kryptik.GMYV expands by jumps and also bounds. Nevertheless, the ransom money notes and also tricks of obtaining the ransom quantity might differ depending on certain local (regional) setups. The ransom money notes and also tricks of extorting the ransom money amount might differ depending on specific regional (local) settings.

Ransomware injection

As an example:

    Faulty notifies about unlicensed software.

    In specific areas, the Trojans frequently wrongfully report having actually discovered some unlicensed applications enabled on the target’s gadget. The sharp then requires the individual to pay the ransom money.

    Faulty declarations regarding illegal web content.

    In countries where software piracy is much less preferred, this approach is not as effective for the cyber scams. Additionally, the Win32/Kryptik.GMYV popup alert might incorrectly declare to be deriving from a police institution as well as will report having situated youngster pornography or various other unlawful information on the gadget.

    Win32/Kryptik.GMYV popup alert may incorrectly claim to be acquiring from a regulation enforcement organization and also will report having situated child pornography or other prohibited data on the tool. The alert will in a similar way have a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 2CFA338E
md5: 4cb8f93cf78a4efeb3dacbc51ebdd80b
name: 4CB8F93CF78A4EFEB3DACBC51EBDD80B.mlw
sha1: cab22bf6aab6102b2b401aadefbd36f0b8580025
sha256: 10250388c686b548774222be57d48e0aac3ca3843136d3e9c45ef884a0c449fa
sha512: bd66122b46acf6987978ba121947e188eca5d33a4daaecb13b990c9278bc932dfc1f7690eeb280c5d8655d8dcd322f64b718146aa735b48e6458008848d61c17
ssdeep: 3072:JCoXWhSC4Hix+b2mrAL6AgFtmCKaE++ebcaPvnDTHMkULXwSw:4IcSCIagvmCKaE+ZYaPvnD4l
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

InternalName: SUMo
CompanyName: KC Softwares
ProductName: SUMo
ProductVersion: 0
FileDescription: SUMo
Translation: 0x040c 0x04e4

Win32/Kryptik.GMYV also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Riskware ( 0040eff71 )
Elastic malicious (high confidence)
DrWeb Trojan.PWS.Spy.21017
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ransom.GandCrab.2018
Cylance Unsafe
Zillya Trojan.Propagate.Win32.842
Sangfor Trojan.Win32.Propagate.uhbg
CrowdStrike win/malicious_confidence_100% (W)
Alibaba VirTool:Win32/CeeInject.46f0e076
K7GW Riskware ( 0040eff71 )
Cybereason malicious.cf78a4
Cyren W32/Kryptik.MI.gen!Eldorado
Symantec Trojan Horse
ESET-NOD32 a variant of Win32/Kryptik.GMYV
Zoner Trojan.Win32.72665
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Ransom.GandCrab.2018
NANO-Antivirus Trojan.Win32.Propagate.fkkxrv
ViRobot Trojan.Win32.Agent.217088.FL
MicroWorld-eScan Gen:Variant.Ransom.GandCrab.2018
Tencent Malware.Win32.Gencirc.10ccb9ab
Ad-Aware Gen:Variant.Ransom.GandCrab.2018
Sophos Mal/Generic-S
Comodo Malware@#3reh7ydyixbk6
BitDefenderTheta Gen:NN.ZexaF.34692.nu0@amRufCmm
VIPRE LooksLike.Win32.Crowti.b (v)
TrendMicro Trojan.Win32.DOFOIL.SMMR
Emsisoft Gen:Variant.Ransom.GandCrab.2018 (B)
Jiangmin Trojan.Propagate.bug
Antiy-AVL Trojan/Generic.ASMalwS.29736C3
Microsoft VirTool:Win32/CeeInject.BDE!bit
Arcabit Trojan.Ransom.GandCrab.D7E2
AegisLab Trojan.Win32.Propagate.4!c
GData Gen:Variant.Ransom.GandCrab.2018
TACHYON Trojan/W32.Propagate.217088
AhnLab-V3 Trojan/Win32.Agent.R245662
McAfee Downloader-ASH.gen.g
MAX malware (ai score=100)
VBA32 BScope.Trojan.Propagate
Panda Trj/GdSda.A
TrendMicro-HouseCall Trojan.Win32.DOFOIL.SMMR
Rising [email protected] (RDML:u6olMCq7ZHA4dzbfVl3ZKg)
Yandex Trojan.GenAsa!ffZvKsqfGIc
Ikarus Trojan.Win32.Crypt
MaxSecure Trojan.Malware.7164915.susgen
Fortinet W32/Kryptik.GSFW!tr
AVG Win32:Trojan-gen

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

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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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