Win32/Kryptik.GYUJ

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

What is Win32/Kryptik.GYUJ infection?

In this short article you will find concerning the definition of Win32/Kryptik.GYUJ and also its adverse effect on your computer system. Such ransomware are a kind of malware that is specified by on-line frauds to demand paying the ransom money by a target.

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Most of the instances, Win32/Kryptik.GYUJ ransomware will certainly advise its victims to start funds transfer for the purpose of neutralizing the changes that the Trojan infection has introduced to the victim’s device.

Win32/Kryptik.GYUJ 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.
  • 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;
  • Detects Sandboxie through the presence of a library;
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Ciphering the papers situated on the target’s disk drive — so the sufferer can no more utilize the information;
  • Preventing normal access 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.GYUJ

The most typical networks whereby Win32/Kryptik.GYUJ Ransomware are injected are:

  • By ways of phishing emails;
  • As an effect of customer ending up on a source that holds a destructive software program;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the information on the sufferer’s PC or avoid the device from functioning in a correct manner – while additionally putting a ransom note that discusses the demand for the victims to impact the settlement for the function of decrypting the papers or restoring the documents system back to the initial problem. In most instances, the ransom money note will turn up when the client reboots the COMPUTER after the system has already been harmed.

Win32/Kryptik.GYUJ distribution channels.

In numerous corners of the world, Win32/Kryptik.GYUJ grows by leaps and also bounds. Nonetheless, the ransom notes and techniques of extorting the ransom money quantity may vary relying on specific regional (local) settings. The ransom notes as well as techniques of obtaining the ransom money amount may vary depending on specific local (regional) setups.

Ransomware injection

As an example:

    Faulty informs about unlicensed software program.

    In specific locations, the Trojans often wrongfully report having actually discovered some unlicensed applications allowed on the target’s gadget. The alert then demands the individual to pay the ransom.

    Faulty declarations about illegal web content.

    In nations where software piracy is less preferred, this method is not as efficient for the cyber scams. Alternatively, the Win32/Kryptik.GYUJ popup alert may wrongly declare to be stemming from a police institution and also will certainly report having situated kid pornography or other unlawful information on the gadget.

    Win32/Kryptik.GYUJ popup alert might falsely claim to be obtaining from a law enforcement establishment as well as will certainly report having situated child porn or various other prohibited data on the device. The alert will similarly include a need for the individual to pay the ransom.

Technical details

File Info:

crc32: C0F50FBD
md5: 78a58e4c73088ddc4bfa907d0d886491
name: cam.exe
sha1: 6a11ed2d05748312f545262cd1fdaaba4f9f4b7e
sha256: 63ffdea570a388c6c6d6671038e8248eec21c08dd5183fabc028f47adf66b7cf
sha512: e4fefa543f213fbb5af7e6e1327f25f0ea9bea31fd98361b0d6f75010051b4b9ccd08c269aeaf1e08e209ede229d4b6ddd5a0a66959f02e3e50d173a82c1bf39
ssdeep: 3072:hJe7Nu6I72a9Ww9Hd6FoeXXlFKGxxpvjEd+Tyx2+Stcs:Eu6ICaUw36qcXDKe0eyw
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: Copyright xa9Camshare, Inc. 1995-Present
CompanyName: Camshare, Inc.
LegalTrademarks: Copyright xa9Camshare, Inc. 1995-Present
ProductName: Afternoon
ProductVersion: 4.7.33.8
FileDescription: Navigatr Unwarranted Createcomponentinfo Clrs Nyb
OriginalFilename: Afternoon
Translation: 0x0409 0x04b0

Win32/Kryptik.GYUJ also known as:

GridinSoftTrojan.Ransom.Gen
MicroWorld-eScanTrojan.GenericKD.32759545
FireEyeGeneric.mg.78a58e4c73088ddc
CAT-QuickHealBackdoor.Mokes
ALYacBackdoor.Mokes.gen
MalwarebytesTrojan.Injector
ZillyaTrojan.Mokes.Win32.16
AegisLabTrojan.Win32.Malicious.4!c
SangforMalware
K7AntiVirusTrojan ( 0055c4d11 )
BitDefenderTrojan.GenericKD.32759545
K7GWTrojan ( 0055c4d11 )
Cybereasonmalicious.d05748
TrendMicroTROJ_GEN.R002C0PKT19
SymantecML.Attribute.HighConfidence
APEXMalicious
AvastWin32:Malware-gen
GDataTrojan.GenericKD.32759545
KasperskyBackdoor.Win32.Mokes.ahje
AlibabaTrojan:Win32/Kryptik.a81b0a23
NANO-AntivirusTrojan.Win32.Kryptik.gktkzl
ViRobotTrojan.Win32.Z.Highconfidence.176128.P
RisingTrojan.Generic@ML.86 (RDMK:K6qdwsZ7a7d5l+2pJqRMBQ)
Ad-AwareTrojan.GenericKD.32759545
SophosMal/Generic-S
F-SecureTrojan.TR/Crypt.ZPACK.uigbo
DrWebTrojan.DownLoader30.50627
VIPRETrojan.Win32.Generic!BT
Invinceaheuristic
McAfee-GW-EditionRDN/Generic.dx
Trapminesuspicious.low.ml.score
EmsisoftTrojan.GenericKD.32759545 (B)
IkarusTrojan-Ransom.GandCrab
CyrenW32/Trojan.STIS-8670
JiangminBackdoor.Mokes.bwp
WebrootW32.Trojan.Gen
AviraTR/Crypt.ZPACK.uigbo
MAXmalware (ai score=100)
Antiy-AVLTrojan/Win32.Occamy
Endgamemalicious (moderate confidence)
ArcabitTrojan.Generic.D1F3DEF9
ZoneAlarmBackdoor.Win32.Mokes.ahje
MicrosoftTrojan:Win32/Occamy.C
AhnLab-V3Trojan/Win32.Kryptik.C3627584
McAfeeRDN/Generic.dx
VBA32BScope.Trojan.MSIL.DOTHETUK
CylanceUnsafe
PandaTrj/CI.A
ESET-NOD32a variant of Win32/Kryptik.GYUJ
TrendMicro-HouseCallTROJ_GEN.R002C0PKT19
MaxSecureTrojan.Malware.74714915.susgen
FortinetW32/Mokes.AHJE!tr
AVGWin32:Malware-gen
Paloaltogeneric.ml
CrowdStrikewin/malicious_confidence_80% (W)
Qihoo-360HEUR/QVM11.1.7ECF.Malware.Gen

How to remove Win32/Kryptik.GYUJ virus?

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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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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 install-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.GYUJ 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.GYUJ 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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