Win32/Kryptik.GNOI

What is Win32/Kryptik.GNOI infection?

In this article you will certainly discover concerning the definition of Win32/Kryptik.GNOI and also its negative effect on your computer. Such ransomware are a type of malware that is clarified by on-line frauds to demand paying the ransom money by a victim.

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Most of the cases, Win32/Kryptik.GNOI infection will advise its victims to initiate funds move for the objective of counteracting the modifications that the Trojan infection has actually presented to the target’s tool.

Win32/Kryptik.GNOI Summary

These adjustments 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.
  • 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.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • 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: Serbian;
  • Detects the presence of Wine emulator via function name;
  • Detects Sandboxie through the presence of a library;
  • Detects SunBelt Sandbox through the presence of a library;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • 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
  • 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.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Operates on local firewall’s policies and settings;
  • Creates a copy of itself;
  • Attempts to disable System Restore. System Restore function – allows you to revert the computer’s state (system files, applications, and system settings) to that of a previous point in time, which can be used to recover after a virus attack.
  • Attempts to modify or disable Security Center warnings;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents found on the victim’s disk drive — so the target can no more make use of the information;
  • Preventing normal 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.GNOI

One of the most regular networks whereby Win32/Kryptik.GNOI are infused are:

  • By means of phishing e-mails;
  • As an effect of individual ending up on a source that hosts a destructive software;

As soon as the Trojan is effectively infused, it will either cipher the information on the sufferer’s PC or stop the gadget from functioning in a correct manner – while also placing a ransom money note that mentions the requirement for the targets to effect the payment for the function of decrypting the papers or bring back the file system back to the initial condition. In a lot of instances, the ransom money note will certainly show up when the client reboots the COMPUTER after the system has currently been harmed.

Win32/Kryptik.GNOI distribution channels.

In various edges of the globe, Win32/Kryptik.GNOI grows by leaps as well as bounds. Nonetheless, the ransom money notes and also techniques of extorting the ransom money quantity might differ relying on specific local (regional) setups. The ransom money notes as well as methods of obtaining the ransom quantity might differ depending on certain regional (regional) settings.

Ransomware injection

For example:

    Faulty notifies concerning unlicensed software program.

    In specific locations, the Trojans typically wrongfully report having spotted some unlicensed applications allowed on the victim’s device. The sharp then demands the user to pay the ransom money.

    Faulty statements regarding unlawful content.

    In nations where software piracy is much less preferred, this approach is not as reliable for the cyber scams. Conversely, the Win32/Kryptik.GNOI popup alert might incorrectly assert to be deriving from a police institution and will certainly report having located youngster pornography or other unlawful information on the device.

    Win32/Kryptik.GNOI popup alert might wrongly claim to be acquiring from a legislation enforcement establishment and also will report having located kid porn or other unlawful information on the device. The alert will likewise consist of a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: A6808923
md5: afd96f9ea707a6e25002f5b48386a548
name: AFD96F9EA707A6E25002F5B48386A548.mlw
sha1: 3c5ee6ea06ad4d65961f5e0c16b9cff870315f51
sha256: 33682a03e7e616cd078704433e430a7897c42aa76ef78b0f4595ea85cf22592f
sha512: 8323766931ccbbee01867c4dc238c965ad6ab33b225bd0ef37685598ed3a2d5bcbe0ce87bb2ba8d7e184d4bdc0758012aab8b64f45199191dac9e79bac542301
ssdeep: 3072:spW8PAiLFBG5Ko9WZEa5ZVK0KytRmxpQFEmXfMugk:fMy5V9wjVK0Kyt1VvMu
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 2018, havawuxuzarabel
InternalName: yajacen.exe
FileVersion: 3.7.7.8
ProductVersion: 3.7.7.8

Win32/Kryptik.GNOI also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.FamVT.HydraTD.Trojan
K7AntiVirus Trojan ( 00543e471 )
Elastic malicious (high confidence)
DrWeb Trojan.BtcMine.3164
Cynet Malicious (score: 100)
CAT-QuickHeal Trojanpws.Azorult
ALYac Trojan.GenericKDZ.71239
Cylance Unsafe
Zillya Trojan.Bayrob.Win32.33563
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (W)
Alibaba Trojan:Win32/Gandcrab.d6422b84
K7GW Trojan ( 00543e471 )
Cybereason malicious.ea707a
Symantec Packed.Generic.525
ESET-NOD32 a variant of Win32/Kryptik.GNOI
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan-PSW.Win32.Azorult.gen
BitDefender Trojan.GenericKDZ.71239
NANO-Antivirus Trojan.Win32.Bayrob.fkyxag
MicroWorld-eScan Trojan.GenericKDZ.71239
Tencent Win32.Trojan.Generic.Lscf
Ad-Aware Trojan.GenericKDZ.71239
Sophos Mal/Generic-R + Mal/Kryptik-CQ
Comodo TrojWare.Win32.Chapak.OI@82a1oa
VIPRE Trojan.Win32.Generic!BT
TrendMicro Trojan.Win32.SODINOK.SM.hp
McAfee-GW-Edition BehavesLike.Win32.Generic.ht
FireEye Generic.mg.afd96f9ea707a6e2
Emsisoft Trojan.GenericKDZ.71239 (B)
Jiangmin Trojan.Bayrob.asxg
Avira TR/Crypt.XPACK.Gen2
Microsoft Trojan:Win32/Gandcrab.RPD!MTB
AegisLab Trojan.Win32.Azorult.i!c
GData Trojan.GenericKDZ.71239
AhnLab-V3 Win-Trojan/MalPe4.Suspicious.X1939
McAfee Trojan-FPST!AFD96F9EA707
MAX malware (ai score=87)
VBA32 BScope.Trojan.Fuery
Malwarebytes Trojan.MalPack
Panda Trj/CI.A
TrendMicro-HouseCall Trojan.Win32.SODINOK.SM.hp
Rising Ransom.GandCrypt!1.B648 (CLOUD)
Ikarus Trojan.Win32.Crypt
MaxSecure Ransomeware.GandCrypt.JZ
Fortinet W32/GenKryptik.CUPF!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.GandCrab.HwoCSaYA

How to remove Win32/Kryptik.GNOI ransomware?

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.GNOI 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.GNOI 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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