Win32/Kryptik.HJWK

Written by Robert Bailey

What is Win32/Kryptik.HJWK infection?

In this post you will certainly discover regarding the definition of Win32/Kryptik.HJWK as well as its negative impact on your computer. Such ransomware are a type of malware that is elaborated by online fraudulences to demand paying the ransom by a sufferer.

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Most of the instances, Win32/Kryptik.HJWK ransomware will certainly instruct its targets to launch funds transfer for the objective of neutralizing the modifications that the Trojan infection has actually introduced to the sufferer’s device.

Win32/Kryptik.HJWK 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.
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • 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!
  • 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
  • Exhibits possible ransomware file modification behavior;
  • 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.
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the target’s hard drive — so the target can no longer utilize the information;
  • Preventing normal access 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.

Win32/Kryptik.HJWK

The most common channels where Win32/Kryptik.HJWK are infused are:

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

As quickly as the Trojan is successfully infused, it will either cipher the information on the victim’s PC or avoid the tool from working in a correct fashion – while additionally positioning a ransom note that states the need for the sufferers to impact the settlement for the function of decrypting the documents or recovering the file system back to the first problem. In a lot of circumstances, the ransom note will turn up when the client reboots the PC after the system has actually currently been harmed.

Win32/Kryptik.HJWK circulation networks.

In various edges of the world, Win32/Kryptik.HJWK grows by leaps and also bounds. Nevertheless, the ransom notes and tricks of extorting the ransom amount may vary depending on specific local (regional) settings. The ransom money notes as well as techniques of extorting the ransom amount might vary depending on certain regional (regional) settings.

Ransomware injection

For instance:

    Faulty informs regarding unlicensed software application.

    In certain areas, the Trojans frequently wrongfully report having actually found some unlicensed applications allowed on the target’s tool. The alert after that demands the customer to pay the ransom money.

    Faulty statements about unlawful content.

    In countries where software piracy is less popular, this technique is not as efficient for the cyber fraudulences. Additionally, the Win32/Kryptik.HJWK popup alert might falsely assert to be deriving from a law enforcement institution and also will certainly report having situated youngster pornography or various other unlawful information on the device.

    Win32/Kryptik.HJWK popup alert might wrongly claim to be obtaining from a law enforcement establishment and will report having situated kid pornography or various other unlawful information on the device. The alert will in a similar way include a requirement for the individual to pay the ransom.

Technical details

File Info:

crc32: F68847B1
md5: a34ceb9c75ceaceb5998ca0af804c50a
name: A34CEB9C75CEACEB5998CA0AF804C50A.mlw
sha1: 944c5d84adf205ec927aa7d31b083dc49dcb7cc3
sha256: 97c559034eff5287d2a74db45e5e3d9014d322697729504960b313531727cd5e
sha512: 893e070cbd6a7ddd04e66bb19ee5c5658429aba76185922c3c0813e349ed7646381b400975c6d3193b0dbe137c86ec3b3a51a0538184a772647470e8da5173ad
ssdeep: 1536:AQLLiEvZ0DgCl03U7mKRfzLdTEMibScAXrh3e5VWc7NSDrh8SICzlu+cT2+L:bLLvvLi7dVSMibScacF78Dd8MxxcTt
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.HJWK also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
Elastic malicious (high confidence)
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (W)
Cybereason malicious.4adf20
ESET-NOD32 a variant of Win32/Kryptik.HJWK
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky Trojan-Ransom.Win32.Blocker.mwcs
NANO-Antivirus Virus.Win32.Gen.ccmw
Sophos ML/PE-A + Mal/EncPk-APW
BitDefenderTheta Gen:NN.ZexaF.34678.iqW@aGiy1Ll
FireEye Generic.mg.a34ceb9c75ceaceb
SentinelOne Static AI – Malicious PE
Microsoft Trojan:Win32/Caynamer.A!ml
Acronis suspicious
VBA32 BScope.TrojanProxy.Convagent
Malwarebytes Ransom.Phobos
Rising Backdoor.PMax!8.2E40 (TFE:dGZlOgFiigHALmIzMw)
Qihoo-360 HEUR/QVM19.1.9E34.Malware.Gen

How to remove Win32/Kryptik.HJWK 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.HJWK 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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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Win32/Kryptik.HJWK 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/products/

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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