MSIL/Kryptik.FOA

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is MSIL/Kryptik.FOA infection?

In this post you will certainly locate about the meaning of MSIL/Kryptik.FOA and also its adverse impact on your computer system. Such ransomware are a form of malware that is specified by on the internet frauds to require paying the ransom money by a victim.

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Most of the instances, MSIL/Kryptik.FOA infection will certainly instruct its targets to start funds move for the function of counteracting the amendments that the Trojan infection has actually introduced to the sufferer’s device.

MSIL/Kryptik.FOA 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.
  • Uses Windows utilities for basic functionality;
  • Sniffs keystrokes;
  • 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
  • Ciphering the documents situated on the sufferer’s hard disk — so the target can no longer utilize the data;
  • Preventing routine accessibility 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.

MSIL/Kryptik.FOA

The most normal channels where MSIL/Kryptik.FOA are infused are:

  • By ways of phishing emails;
  • As an effect of user ending up on a resource that organizes a harmful software;

As soon as the Trojan is effectively injected, it will either cipher the information on the sufferer’s computer or avoid the tool from functioning in a proper fashion – while also placing a ransom note that states the need for the victims to impact the repayment for the purpose of decrypting the papers or restoring the documents system back to the preliminary condition. In a lot of circumstances, the ransom note will certainly come up when the customer reboots the COMPUTER after the system has currently been harmed.

MSIL/Kryptik.FOA circulation networks.

In different edges of the globe, MSIL/Kryptik.FOA expands by jumps and also bounds. Nevertheless, the ransom money notes and techniques of extorting the ransom amount may vary depending on particular local (regional) settings. The ransom money notes and tricks of extorting the ransom money quantity may vary depending on certain neighborhood (local) setups.

Ransomware injection

For instance:

    Faulty alerts concerning unlicensed software application.

    In certain locations, the Trojans usually wrongfully report having actually spotted some unlicensed applications made it possible for on the victim’s tool. The sharp after that requires the user to pay the ransom money.

    Faulty statements concerning prohibited material.

    In countries where software piracy is much less preferred, this method is not as reliable for the cyber fraudulences. Additionally, the MSIL/Kryptik.FOA popup alert might falsely assert to be originating from a police organization as well as will report having situated kid pornography or various other illegal data on the tool.

    MSIL/Kryptik.FOA popup alert might wrongly declare to be obtaining from a regulation enforcement establishment and will certainly report having situated kid porn or other prohibited data on the gadget. The alert will likewise have a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 9259D909
md5: f569a25e72b24046519b7969af0128b9
name: F569A25E72B24046519B7969AF0128B9.mlw
sha1: 551a5f58971b8c517cc5ec933ede15ce9d5d5710
sha256: 7c95c7cf3b148952982ebbf6373bf2effeeef02daf8233f9a8bcb8fd25499743
sha512: c3c7f3c92f146befcb8e5e73c551edf62e16c1f774610c20b46bb60a39b3102292f7c1c09f68f78fe60a53405c8a6854fc3e1fc399f8234de704ce45518b2643
ssdeep: 1536:oT4I+n8gog8LA3Frw4/dPILtm0CakGreuLJPs6:oT4d8gJ8eFrF/dPILtm0VkGreQJPs6
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 Microsoft 2016
Assembly Version: 1.0.0.0
InternalName: Winston.exe
FileVersion: 1.0.0.0
CompanyName: Microsoft
ProductName: Winston
ProductVersion: 1.0.0.0
FileDescription: Winston
OriginalFilename: Winston.exe

MSIL/Kryptik.FOA also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 0055e3981 )
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader10.20172
Cynet Malicious (score: 85)
ALYac Gen:Heur.MSIL.Abuja.1
Cylance Unsafe
Zillya Trojan.Blocker.Win32.35182
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
Alibaba Ransom:Win32/Blocker.ec7fb803
K7GW Trojan ( 0055e3981 )
Cybereason malicious.e72b24
ESET-NOD32 a variant of MSIL/Kryptik.FOA
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.jiva
BitDefender Gen:Heur.MSIL.Abuja.1
NANO-Antivirus Trojan.Win32.Kryptik.eejvco
MicroWorld-eScan Gen:Heur.MSIL.Abuja.1
Tencent Win32.Trojan.Bp-autorun.Zclz
Ad-Aware Gen:Heur.MSIL.Abuja.1
Sophos ML/PE-A
BitDefenderTheta Gen:NN.ZemsilF.34608.dq0@ay91QYn
VIPRE Trojan.Win32.Generic!BT
FireEye Generic.mg.f569a25e72b24046
Emsisoft Gen:Heur.MSIL.Abuja.1 (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1108899
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Backdoor:Win32/Bladabindi!ml
GData Gen:Heur.MSIL.Abuja.1
AhnLab-V3 Backdoor/Win32.Bladabindi.C1667634
McAfee Artemis!F569A25E72B2
MAX malware (ai score=100)
Panda Trj/GdSda.A
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.Blocker!pY0wqXJFfKQ
Ikarus Trojan.MSIL.Crypt
Fortinet MSIL/Kryptik.FOA!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Blocker.HgIASPkA

How to remove MSIL/Kryptik.FOA 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 MSIL/Kryptik.FOA 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 MSIL/Kryptik.FOA 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/comparison

About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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