Win32/Kryptik.GMUN

What is Win32/Kryptik.GMUN infection?

In this post you will certainly discover about the definition of Win32/Kryptik.GMUN and also its negative impact on your computer system. Such ransomware are a kind of malware that is clarified by on the internet scams to require paying the ransom by a victim.

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Most of the cases, Win32/Kryptik.GMUN ransomware will certainly advise its sufferers to start funds transfer for the function of counteracting the amendments that the Trojan infection has actually introduced to the sufferer’s device.

Win32/Kryptik.GMUN 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.
  • Presents an Authenticode digital signature;
  • 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.

  • 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
  • Collects information about installed applications;
  • 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.
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the target’s disk drive — so the target 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.GMUN

The most typical channels whereby Win32/Kryptik.GMUN Ransomware are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a consequence of customer ending up on a resource that organizes a malicious software application;

As quickly as the Trojan is successfully injected, it will either cipher the information on the target’s computer or prevent the tool from functioning in a proper manner – while likewise positioning a ransom money note that points out the requirement for the victims to effect the settlement for the purpose of decrypting the records or bring back the documents system back to the preliminary condition. In most instances, the ransom money note will certainly show up when the client reboots the COMPUTER after the system has actually already been harmed.

Win32/Kryptik.GMUN circulation networks.

In different edges of the world, Win32/Kryptik.GMUN grows by jumps and bounds. However, the ransom money notes and also methods of extorting the ransom quantity might vary depending on certain regional (local) setups. The ransom money notes and also tricks of obtaining the ransom quantity may vary depending on specific neighborhood (local) settings.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software program.

    In specific areas, the Trojans often wrongfully report having identified some unlicensed applications enabled on the victim’s device. The alert then requires the user to pay the ransom.

    Faulty declarations concerning prohibited material.

    In nations where software piracy is less popular, this technique is not as effective for the cyber scams. Conversely, the Win32/Kryptik.GMUN popup alert might falsely assert to be originating from a law enforcement establishment and also will certainly report having located child pornography or other illegal information on the device.

    Win32/Kryptik.GMUN popup alert might incorrectly claim to be obtaining from a regulation enforcement institution and will report having located kid porn or other illegal information on the device. The alert will similarly include a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: AC5329EE
md5: 42f863b666068491f41cfcacc57eb711
name: 42F863B666068491F41CFCACC57EB711.mlw
sha1: 073acb2735748c3f14dbfb0b48d5dab8c504094c
sha256: 0813dd814b07bb9acf1114bd8a5f4b4b624c667464bac48d91ebd9f9c8e640c7
sha512: acbe1a66b86944dc0c5e4b4f8b54cb392d6e708c04e84e9ef61ffbc85fa70405281f0346d07c164c903aaa394154c0f18578df34bed206b572438f5b307cedd9
ssdeep: 24576:XSyLtIBYWFkfV0hfPnZBdWGktI7ie8ydTF4EWCz:DKBlNfPjd1ktOie8y1Fzz
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: migrate.exe
FileVersion: 9.00.00.4503 (xpsp.080413-0845)
CompanyName: Microsoft Corporation
ProductName: Microsoftxae Windows Media Services
ProductVersion: 9.00.00.4503
FileDescription: MLS Migrate DLL
OriginalFilename: migrate.exe
Translation: 0x0409 0x04b0

Win32/Kryptik.GMUN also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0056708b1 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.26601
Cynet Malicious (score: 100)
ALYac Trojan.Ransom.Shade
Cylance Unsafe
Zillya Trojan.Shade.Win32.866
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:Win32/Shade.fd132fa1
K7GW Trojan ( 0056708b1 )
Cybereason malicious.666068
Cyren W32/Ransom.KS.gen!Eldorado
Symantec Trojan Horse
ESET-NOD32 a variant of Win32/Kryptik.GMUN
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Shade.pbq
BitDefender Gen:Heur.Mint.Jamg.1
NANO-Antivirus Trojan.Win32.Shade.fkfjju
MicroWorld-eScan Gen:Heur.Mint.Jamg.1
Tencent Win32.Trojan.Shade.Pege
Ad-Aware Gen:Heur.Mint.Jamg.1
Sophos Mal/Generic-R + Mal/Emotet-Q
Comodo TrojWare.Win32.Shade.F@8rqwur
BitDefenderTheta Gen:NN.ZexaF.34608.sr1@aaYEqGoi
VIPRE Trojan.Win32.Generic!BT
TrendMicro TrojanSpy.Win32.EMOTET.SMA
McAfee-GW-Edition Ransomware-GNS!42F863B66606
FireEye Generic.mg.42f863b666068491
Emsisoft Trojan-Ransom.Shade (A)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1111620
eGambit PE.Heur.InvalidSig
Microsoft Trojan:Win32/Emotet.PB
Arcabit Trojan.Mint.Jamg.1
AegisLab Trojan.Win32.Shade.4!c
GData Gen:Heur.Mint.Jamg.1
AhnLab-V3 Malware/Win32.Generic.C2838265
McAfee Ransomware-GNS!42F863B66606
VBA32 BScope.Trojan.MulDrop
Malwarebytes Trojan.Crypt
Panda Trj/GdSda.A
TrendMicro-HouseCall TrojanSpy.Win32.EMOTET.SMA
Rising Ransom.Shade!8.12CC (CLOUD)
Ikarus Trojan-Ransom.Crypted007
MaxSecure Trojan.Malware.11417434.susgen
Fortinet W32/GandCrab.D!tr.ransom
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Ransom.87e

How to remove Win32/Kryptik.GMUN 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.GMUN 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.GMUN 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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