Win32/Kryptik.FNNF

Written by Robert Bailey

What is Win32/Kryptik.FNNF infection?

In this post you will certainly locate concerning the interpretation of Win32/Kryptik.FNNF and its adverse influence on your computer. Such ransomware are a kind of malware that is clarified by on-line fraudulences to require paying the ransom money by a target.

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In the majority of the situations, Win32/Kryptik.FNNF ransomware will advise its sufferers to launch funds move for the purpose of neutralizing the modifications that the Trojan infection has actually presented to the target’s device.

Win32/Kryptik.FNNF Summary

These adjustments 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.
  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • A process attempted to delay the analysis task.;
  • 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • Queries information on disks for anti-virtualization via Device Information APIs;
  • 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 copy of itself;
  • Creates a slightly modified copy of itself;
  • Ciphering the records situated on the target’s hard drive — so the sufferer can no longer utilize the information;
  • Preventing regular 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.FNNF

One of the most common channels whereby Win32/Kryptik.FNNF are infused are:

  • By means of phishing emails;
  • As an effect of individual winding up on a resource that holds a destructive software application;

As quickly as the Trojan is successfully infused, it will either cipher the data on the target’s PC or prevent the gadget from functioning in a correct manner – while additionally positioning a ransom money note that states the requirement for the targets to effect the settlement for the purpose of decrypting the files or recovering the documents system back to the preliminary problem. In a lot of circumstances, the ransom money note will turn up when the client restarts the PC after the system has currently been harmed.

Win32/Kryptik.FNNF distribution channels.

In various edges of the globe, Win32/Kryptik.FNNF expands by jumps and bounds. However, the ransom notes and tricks of extorting the ransom quantity might differ depending on specific regional (local) settings. The ransom money notes and techniques of obtaining the ransom quantity might vary depending on certain local (local) setups.

Ransomware injection

For example:

    Faulty alerts concerning unlicensed software application.

    In particular areas, the Trojans frequently wrongfully report having actually detected some unlicensed applications enabled on the victim’s device. The alert after that demands the individual to pay the ransom money.

    Faulty declarations concerning illegal material.

    In nations where software piracy is much less prominent, this method is not as reliable for the cyber scams. Conversely, the Win32/Kryptik.FNNF popup alert might incorrectly claim to be originating from a police institution as well as will certainly report having located child pornography or other prohibited information on the gadget.

    Win32/Kryptik.FNNF popup alert may incorrectly assert to be deriving from a law enforcement organization as well as will report having located kid pornography or other unlawful data on the tool. The alert will similarly consist of a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: 5A10A88C
md5: b5288bf82ae6d374e1da1a4da3e77373
name: B5288BF82AE6D374E1DA1A4DA3E77373.mlw
sha1: 98c8690486692d4289e14fb62c521b29424f8875
sha256: 95d636383b52125f4f4327b75a4f1ad1fc8cdd481fc7ca8865fd3a834c665d28
sha512: ab65648c4093ce42b418e93b072b9371cdaf61dccb54841f9c3d089d20eec7cba27731b5a5d5bde377d69e5776b91f7273cd814454a28f3641299a48090dd6ec
ssdeep: 12288:PXYH8+WYLZIGwhiYmFT/bqozT6VhFxwZBH1Et03fYw:obLZIPkTqSsxwrVEug
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 2016 All rights reserved. AMD Inc.
FileVersion: 9.8.3.391
CompanyName: AMD Inc.
ProductName: LipsVested
ProductVersion: 9.8.3.391
FileDescription: Inta Kung Easier Areal Cunningham
OriginalFilename: LipsVested.exe
Translation: 0x0409 0x04b0

Win32/Kryptik.FNNF also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 0056e90d1 )
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Ursu.26349
ALYac Gen:Variant.Ursu.26349
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (D)
Alibaba Backdoor:Win32/Androm.ed7587cb
K7GW Trojan ( 0056e90d1 )
Cybereason malicious.82ae6d
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kryptik.FNNF
APEX Malicious
Avast Win32:Malware-gen
Cynet Malicious (score: 100)
Kaspersky Backdoor.Win32.Androm.opjz
BitDefender Gen:Variant.Ursu.26349
NANO-Antivirus Trojan.Win32.Androm.fhvofk
Tencent Win32.Backdoor.Androm.Pdca
Ad-Aware Gen:Variant.Ursu.26349
Sophos Mal/Generic-S
Comodo Malware@#1mix7ofvcp3xi
BitDefenderTheta Gen:NN.ZexaF.34684.Ey0@a8hVRboi
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Ransomware.gc
FireEye Generic.mg.b5288bf82ae6d374
Emsisoft Gen:Variant.Ursu.26349 (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1123833
eGambit Unsafe.AI_Score_99%
Microsoft TrojanSpy:Win32/Ursnif
AegisLab Trojan.Multi.Generic.4!c
ZoneAlarm Backdoor.Win32.Androm.opjz
GData Gen:Variant.Ursu.26349
Acronis suspicious
McAfee Artemis!B5288BF82AE6
MAX malware (ai score=98)
VBA32 BScope.TrojanRansom.Foreign
Malwarebytes MachineLearning/Anomalous.96%
Panda Trj/CI.A
TrendMicro-HouseCall Possible_HPGen-38
Rising Backdoor.Androm!8.113 (CLOUD)
Yandex Backdoor.Androm!ep3EL5DPq6U
Ikarus Trojan-Ransom.GandCrab
Fortinet W32/Kryptik.FOQJ!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove Win32/Kryptik.FNNF 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.FNNF 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

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