Win32/Kryptik.FULK

What is Win32/Kryptik.FULK infection?

In this post you will certainly locate regarding the definition of Win32/Kryptik.FULK and its adverse effect on your computer system. Such ransomware are a kind of malware that is clarified by on-line frauds to demand paying the ransom by a victim.

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Most of the cases, Win32/Kryptik.FULK ransomware will instruct its victims to initiate funds transfer for the function of neutralizing the changes that the Trojan infection has presented to the sufferer’s gadget.

Win32/Kryptik.FULK Summary

These modifications can be as follows:

  • 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 with CreateRemoteThread in a remote process;
  • 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.
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • A process created a hidden window;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Unconventionial language used in binary resources: Arabic (Egypt);
  • Uses Windows utilities for basic functionality;
  • Deletes its original binary from disk;
  • 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
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Harvests information related to installed mail clients;
  • Creates a slightly modified copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records found on the victim’s hard disk drive — so the sufferer can no longer use the data;
  • Preventing regular access to the target’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.FULK

The most regular networks where Win32/Kryptik.FULK are infused are:

  • By ways of phishing e-mails;
  • As a consequence of individual ending up on a resource that hosts a malicious software program;

As soon as the Trojan is successfully infused, it will certainly either cipher the information on the victim’s PC or avoid the gadget from working in a proper way – while also putting a ransom note that points out the requirement for the sufferers to effect the repayment for the objective of decrypting the files or restoring the file system back to the first problem. In a lot of circumstances, the ransom money note will certainly show up when the customer reboots the PC after the system has actually currently been damaged.

Win32/Kryptik.FULK circulation channels.

In numerous corners of the globe, Win32/Kryptik.FULK grows by leaps as well as bounds. Nonetheless, the ransom money notes and tricks of obtaining the ransom money quantity might vary depending on specific regional (local) settings. The ransom notes and also methods of extorting the ransom amount might vary depending on certain local (local) setups.

Ransomware injection

As an example:

    Faulty notifies concerning unlicensed software application.

    In particular areas, the Trojans often wrongfully report having detected some unlicensed applications enabled on the victim’s tool. The sharp then requires the customer to pay the ransom money.

    Faulty declarations concerning prohibited web content.

    In countries where software piracy is less prominent, this approach is not as effective for the cyber frauds. Additionally, the Win32/Kryptik.FULK popup alert might wrongly declare to be originating from a law enforcement organization and also will report having located kid porn or other prohibited information on the gadget.

    Win32/Kryptik.FULK popup alert might incorrectly assert to be deriving from a law enforcement establishment as well as will certainly report having situated child pornography or other unlawful data on the gadget. The alert will in a similar way consist of a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: CD7F8F9F
md5: a113a433b7b469b76b25588dbb9f46ea
name: A113A433B7B469B76B25588DBB9F46EA.mlw
sha1: 6c99caea7ea6cc02212aaf5c6bf6b283cddd639a
sha256: 0e016921c7ff6201acda5d17ef9f924a77459669b6acfef02ae5c3f98eb925c3
sha512: 6f7073fa5983798f8b86a96e859e6a6113fb7eacacb3ed225b4e67cc0f8799a449c87acd9d7da97fc2013c050ee01e9895c961361877aa18f02358e39401b4fb
ssdeep: 6144:8NvBpCry7aQc9FeeSY1giyNaOwKo/+yRfE7iJntoXkIkAgNbeZl1rk3e:8Nzn7Fc9FeI19y6/+4tnto9kRNbz
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.FULK also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb Trojan.PWS.Papras.2357
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ransom.503
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Trojan:Win32/Kasidet.221b75ca
K7GW Trojan ( 004fa98b1 )
K7AntiVirus Trojan ( 004fa98b1 )
Baidu Win32.Trojan.Kryptik.avl
Symantec Packed.Generic.521
ESET-NOD32 a variant of Win32/Kryptik.FULK
APEX Malicious
Avast FileRepMalware
Kaspersky Trojan.Win32.Kasidet.gif
BitDefender Gen:Variant.Ransom.503
NANO-Antivirus Trojan.Win32.Kasidet.evhufm
MicroWorld-eScan Gen:Variant.Ransom.503
Tencent Win32.Trojan.Kasidet.Lifz
Ad-Aware Gen:Variant.Ransom.503
Sophos Mal/Generic-S
Comodo Worm.Win32.Ngrbot.BHQ@6ldxl0
F-Secure Trojan.TR/Crypt.XPACK.Gen7
BitDefenderTheta Gen:NN.ZexaF.34608.zqW@a4G2vLhG
VIPRE Trojan.Win32.Generic!BT
TrendMicro WORM_HPKASIDET.SM0
McAfee-GW-Edition BehavesLike.Win32.Generic.gh
FireEye Generic.mg.a113a433b7b469b7
Emsisoft Gen:Variant.Ransom.503 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Backdoor.Androm.lef
Avira TR/Crypt.XPACK.Gen7
eGambit Unsafe.AI_Score_97%
Antiy-AVL Trojan/Win32.SGeneric
Microsoft TrojanSpy:Win32/Ursnif
Arcabit Trojan.Ransom.503
ZoneAlarm Trojan.Win32.Kasidet.gif
GData Gen:Variant.Ransom.503
McAfee GenericRXDH-VT!A113A433B7B4
MAX malware (ai score=99)
VBA32 BScope.Trojan-Ransom.Foreign
Malwarebytes Generic.Malware/Suspicious
Panda Trj/GdSda.A
TrendMicro-HouseCall WORM_HPKASIDET.SM0
Rising Trojan.Crypto!8.364 (CLOUD)
Ikarus Backdoor.Win32.Vawtrak
Fortinet W32/Kryptik.FPQK!tr
AVG FileRepMalware
Paloalto generic.ml
Qihoo-360 Win32/Backdoor.Neutrino.HgIASOYA

How to remove Win32/Kryptik.FULK 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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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.FULK 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.FULK 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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