Win32/Kryptik.HLDR

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

What is Win32/Kryptik.HLDR infection?

In this article you will certainly discover regarding the meaning of Win32/Kryptik.HLDR as well as its adverse impact on your computer. Such ransomware are a type of malware that is clarified by online frauds to demand paying the ransom money by a target.

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Most of the situations, Win32/Kryptik.HLDR ransomware will certainly advise its sufferers to start funds transfer for the function of neutralizing the modifications that the Trojan infection has actually presented to the sufferer’s gadget.

Win32/Kryptik.HLDR 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.;
  • A process created a hidden window;
  • Performs some HTTP requests;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Executed a process and injected code into it, probably while unpacking;
  • 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
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the records located on the sufferer’s hard disk drive — so the target can no longer use the data;
  • Preventing routine accessibility to the victim’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
api.2ip.uaHEUR:Trojan-Ransom.Win32.Stop.gen
asvb.topHEUR:Trojan-Ransom.Win32.Stop.gen

Win32/Kryptik.HLDR

The most regular channels through which Win32/Kryptik.HLDR are injected are:

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

As soon as the Trojan is successfully injected, it will certainly either cipher the data on the victim’s PC or avoid the gadget from operating in a correct way – while additionally putting a ransom money note that discusses the need for the targets to impact the settlement for the function of decrypting the documents or bring back the data system back to the initial problem. In a lot of instances, the ransom note will show up when the client reboots the COMPUTER after the system has actually already been harmed.

Win32/Kryptik.HLDR circulation channels.

In different corners of the globe, Win32/Kryptik.HLDR grows by leaps as well as bounds. Nevertheless, the ransom money notes and also techniques of obtaining the ransom quantity may differ relying on certain local (local) settings. The ransom money notes as well as methods of extorting the ransom quantity may vary depending on certain regional (local) settings.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software.

    In certain locations, the Trojans often wrongfully report having detected some unlicensed applications enabled on the sufferer’s gadget. The sharp then requires the individual to pay the ransom money.

    Faulty declarations regarding prohibited material.

    In nations where software program piracy is less preferred, this technique is not as reliable for the cyber frauds. Additionally, the Win32/Kryptik.HLDR popup alert might wrongly claim to be stemming from a police organization and will certainly report having situated youngster porn or other unlawful data on the gadget.

    Win32/Kryptik.HLDR popup alert might incorrectly claim to be acquiring from a regulation enforcement institution and also will certainly report having situated youngster pornography or other illegal information on the device. The alert will in a similar way have a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: A619BEC8
md5: 40d23cf0a987f5a8bc659ed55a4649a5
name: 40D23CF0A987F5A8BC659ED55A4649A5.mlw
sha1: eca7d484db817659d2a643519940a4f5865b552d
sha256: e04773ef8e4ebf8d2e0dae1b3846ad588239bc3ab8205f0ad0ae5deeb58f596c
sha512: 2a281df66bffdf34035f8051d2860ce148e16cc7e283e60509f4ebb642df9ec06b6fa52896b0a62bed529b1da64e3e253de43053a1d76b135bb71526a8437b9e
ssdeep: 24576:8S+5wlri5Wyyny7nXGXp1o/PoFg/jMJZFDYFGl:8SW6qWJUX212PoFg/YZpYFG
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

FileVersus: 1.0.98.58
ProductVersus: 1.0.98.58
Translations: 0x0686 0x036f

Win32/Kryptik.HLDR also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware2
K7AntiVirusTrojan ( 0057d6ab1 )
Elasticmalicious (high confidence)
CynetMalicious (score: 100)
CylanceUnsafe
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (W)
K7GWTrojan ( 0057d6ab1 )
Cybereasonmalicious.4db817
CyrenW32/Kryptik.EFF.gen!Eldorado
SymantecML.Attribute.HighConfidence
ESET-NOD32a variant of Win32/Kryptik.HLDR
APEXMalicious
AvastFileRepMalware
KasperskyHEUR:Trojan-Ransom.Win32.Stop.gen
BitDefenderTrojan.GenericKD.37017496
MicroWorld-eScanTrojan.GenericKD.37017496
Ad-AwareTrojan.GenericKD.37017496
SophosMal/Generic-R + Troj/Kryptik-TR
BitDefenderThetaGen:NN.ZexaF.34692.0qW@aWTp5CaG
McAfee-GW-EditionBehavesLike.Win32.Generic.cc
FireEyeGeneric.mg.40d23cf0a987f5a8
EmsisoftTrojan.GenericKD.37017496 (B)
SentinelOneStatic AI – Malicious PE
WebrootW32.Trojan.Gen
eGambitUnsafe.AI_Score_99%
KingsoftWin32.Troj.Undef.(kcloud)
MicrosoftTrojan:Win32/Azorult!ml
GDataWin32.Trojan.BSE.18JIJAK
AhnLab-V3CoinMiner/Win.Glupteba.R423653
Acronissuspicious
McAfeePacked-GDT!40D23CF0A987
MAXmalware (ai score=82)
MalwarebytesTrojan.MalPack.GS
PandaTrj/GdSda.A
RisingMalware.Heuristic!ET#88% (RDMK:cmRtazprXfbsZJWUKbhhiUtfduaB)
IkarusTrojan.Win32.Crypt
MaxSecureTrojan.Malware.300983.susgen
FortinetW32/Kryptik.HLDB!tr
AVGFileRepMalware
Paloaltogeneric.ml

How to remove Win32/Kryptik.HLDR 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.HLDR 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.HLDR 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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