Win32/Kryptik.FYJN

What is Win32/Kryptik.FYJN infection?

In this post you will find regarding the meaning of Win32/Kryptik.FYJN as well as its adverse influence on your computer. Such ransomware are a kind of malware that is clarified by on the internet scams to demand paying the ransom by a victim.

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In the majority of the cases, Win32/Kryptik.FYJN infection will certainly instruct its sufferers to launch funds transfer for the objective of counteracting the modifications that the Trojan infection has presented to the victim’s gadget.

Win32/Kryptik.FYJN Summary

These alterations 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 (inter-process);
  • Injection (Process Hollowing);
  • Attempts to connect to a dead IP:Port (3 unique times);
  • 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.
  • Uses Windows utilities for basic functionality;
  • Enumerates services, possibly for anti-virtualization;
  • Executed a process and injected code into it, probably while unpacking;
  • Deletes its original binary from disk;
  • 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 interact with an Alternate Data Stream (ADS);
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the victim’s hard drive — so the target can no more utilize the information;
  • Preventing regular accessibility to the target’s workstation;
Similar behavior
Related domains
microsoft-com.mail.protection.outlook.com Ransomware-GHW!D3B4077B3585

Win32/Kryptik.FYJN

The most common channels whereby Win32/Kryptik.FYJN Ransomware are injected are:

  • By methods of phishing emails;
  • As a repercussion of user winding up on a resource that holds a malicious software application;

As soon as the Trojan is effectively injected, it will either cipher the information on the victim’s PC or avoid the device from working in a correct manner – while likewise putting a ransom note that points out the requirement for the sufferers to effect the settlement for the objective of decrypting the records or bring back the documents system back to the first problem. In a lot of circumstances, the ransom money note will certainly show up when the client reboots the PC after the system has actually already been harmed.

Win32/Kryptik.FYJN circulation networks.

In numerous edges of the world, Win32/Kryptik.FYJN expands by jumps and also bounds. Nevertheless, the ransom notes and also tricks of obtaining the ransom amount may differ depending upon particular regional (regional) setups. The ransom money notes as well as tricks of obtaining the ransom money amount may vary depending on specific regional (regional) setups.

Ransomware injection

For instance:

    Faulty notifies about unlicensed software.

    In specific areas, the Trojans often wrongfully report having detected some unlicensed applications allowed on the victim’s tool. The sharp after that demands the individual to pay the ransom money.

    Faulty statements about illegal web content.

    In nations where software piracy is less popular, this approach is not as efficient for the cyber fraudulences. Alternatively, the Win32/Kryptik.FYJN popup alert might incorrectly claim to be deriving from a police organization as well as will certainly report having situated child porn or other unlawful information on the tool.

    Win32/Kryptik.FYJN popup alert may wrongly declare to be deriving from a law enforcement organization and also will certainly report having situated kid porn or various other unlawful data on the gadget. The alert will likewise contain a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 3FCFB1C4
md5: d3b4077b3585b2cbe48db49d709711f8
name: D3B4077B3585B2CBE48DB49D709711F8.mlw
sha1: 5ce56062a5dda96daddeb529dd6737a668c992b4
sha256: 8b9474f5f258e90a1a342640b57acce934fe6eb5310c05e87e587aeffe32bdae
sha512: cad38a6eba36aaf02f60948c175bd3af52086ff1189a6e9ba1b56b6c04dbedc46ccb6852d4b400b81a5b319191f0048a4b911d98991fe2122adc4533f40edf11
ssdeep: 196608:Y66666666666666666666666666666666666666666666666666666666666666:
type: PE32 executable (GUI) Intel 80386 (stripped to external PDB), for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.FYJN also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Generic.Nymaim.E.6A51F429
FireEye Generic.mg.d3b4077b3585b2cb
McAfee Ransomware-GHW!D3B4077B3585
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Malware
K7AntiVirus Trojan ( 0051a4801 )
BitDefender Generic.Nymaim.E.6A51F429
K7GW Trojan ( 0051a4801 )
Cybereason malicious.b3585b
TrendMicro Ransom_CERBER.SMALY0
Cyren W32/Kryptik.CFO.gen!Eldorado
Symantec Packed.Generic.493
APEX Malicious
ClamAV Win.Packed.Barys-7111571-0
Kaspersky HEUR:Trojan.Win32.Generic
Tencent Malware.Win32.Gencirc.10ba0f81
Ad-Aware Generic.Nymaim.E.6A51F429
Emsisoft Generic.Nymaim.E.6A51F429 (B)
Comodo TrojWare.Win32.Crypt.C@7vajd0
F-Secure Heuristic.HEUR/AGEN.1120890
DrWeb Trojan.Siggen10.46947
Invincea ML/PE-A + Mal/Elenoocka-E
McAfee-GW-Edition BehavesLike.Win32.Generic.vh
Sophos Mal/Elenoocka-E
Ikarus Win32.Outbreak
Avira HEUR/AGEN.1120890
MAX malware (ai score=89)
Antiy-AVL Trojan/Win32.AGeneric
Microsoft Backdoor:Win32/Tofsee.T
Arcabit Generic.Nymaim.E.6A51F429
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Generic.Nymaim.E.6A51F429
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Poison.R347005
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.34634.@tW@aCojZtf
ALYac Generic.Nymaim.E.6A51F429
VBA32 Trojan.FakeAV.01657
Malwarebytes Trojan.MalPack
ESET-NOD32 a variant of Win32/Kryptik.FYJN
TrendMicro-HouseCall Ransom_CERBER.SMALY0
Rising Trojan.Kryptik!1.B3B3 (CLASSIC)
Yandex Trojan.GenAsa!+T/eLY4hldk
SentinelOne Static AI – Suspicious PE
Fortinet W32/Kryptik.CQXJ!tr
AVG FileRepMalware
Avast Win32:Evo-gen [Susp]
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 HEUR/QVM19.1.4AFB.Malware.Gen

How to remove Win32/Kryptik.FYJN 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

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.FYJN 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.FYJN 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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