This article will aid you to remove .mdk4y Ransomware. Follow the ransomware removal instructions provided at the end of the article.
.mdk4y Ransomware is one that encrypts your data and demands money as a ransom to get it restored. Files will receive the .mdk4y extension. The .mdk4y Ransomware will leave ransomware instructions as a desktop wallpaper image. Keep on reading the article and see how you could try to potentially recover some of your locked files and data.
Threat Summary
| Name | .mdk4y ransomware |
| Type | Ransomware, Cryptovirus |
| Short Description | The ransomware encrypts files by placing the .mdk4y before the affected files on your computer system and demands a ransom to be paid to allegedly recover them. |
| Symptoms | The ransomware will encrypt your files and leave a ransom note with payment instructions. |
| Distribution Method | Spam Emails, Email Attachments |
| Detection Tool |
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Malware Removal Tool
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User Experience | Join Our Forum to Discuss .mdk4y ransomware. |
| Data Recovery Tool | Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive. |
.mdk4y Ransomware – Distribution Techniques
The .mdk4y ransomware is a new release that is attributed to the Kraken ransomware family. At the moment of writing this article no in-depth information is available about it which probably means that the sent volume of infections is low. This may mean that the virus is still being developed and a testing wave has been initiated or that an early version has been leaked onto the web. Whatever the reason the hackers behind it will probably attempt different tactics in order to judge which one would be the most effective at infecting as much victims as possible.
Most ransomware will be spread via SPAM email messages that use both phishing and SPAM tactics in order to coerce as much targets into infecting themselves as possible. They will be designed as legitimate notifications from a well-known company, portal or product that the victims might recognize. The .mdk4y ransomware files can be either attached directly to the messages as file attachments or linked in the body contents via multimedia content and in text links.
The creation of malicious web sites is the other popular tactic which is done by the hackers. They will create fake landing pages, download portals or other web addresses that can impersonate popular and safe sites. Most of the successful ones use stolen or hacker-made security certificates and similar sounding domain names.
To deliver more files and increase the number of potentially affected users the hackers can also send them via file-sharing networks like BitTorrent. It is used by computer users to share both legitimate and pirate content such as applications, movies, games, e-books and etc.
The .mdk4y ransomware samples can additionally be embedded in other files to create the so-called payload carriers of which there are two popular variants:
- Software Installers — The criminals behind the malware can modify the legitimate setup files of popular applications to lead to the virus infections. Choices include system utilities, productivity and office apps, as well as creativity suites and games. Whenever one of these files is run the ransomware installation will begin in the background.
- Malicious Documents — The same strategy can be used to modify documents across all popular formats: spreadsheets, databases, text documents and presentations. Whenever one of them is opened by a victim user it will spawn a notification prompt requesting that the built-in macros (scripts) to be enabled in order to “correctly view” the file.
In order to carry out larger .mdk4y ransomware attacks the hackers may use malicious browser plugins which are also known as hijackers. They are widely deployed to the relevant repositories using fake (or stolen) developer credentials and user reviews. The elaborate descriptions promise new features and enhancements. As soon as they are installed the .mdk4y ransomware will be installed. Most of the hijackers additionally will change the settings of the browsers by redirecting the victims to a hacker-controlled landing page. Modifications include the default home page, search engine and new tabs page.
.mdk4y Ransomware – Detailed Analysis
The .mdk4y ransomware is a new samples that belongs to the Kraken ransomware family. As such the behavior patterns that are known from the previous versions will probably be used. It is possible that follow-up versions of it will be developed with additional features and upgraded code.
The Kraken ransomware infections are notorious for impacting as many devices as possible during a single infection which is attributed to the fact that some of the samples may have launched an advanced data harvesting module. It is used to gather sensitive data that can be grouped into two main categories:
- Personal Data — The engine can be programmed to extract data that can directly expose the identity of the victim users. This is possible due to the fact that the engine can scan for specific strings both in the hard disk contents, memory and the Windows Registry. This leads to the exposure of their name, address, location, interests and any stored account credentials.
- Machine Information — The engine can harvest metrics about the infected computers, specifically the hardware components, user configuration, boot options and regional settings. The bulk of the collected is run through an algorithm that takes the collected information and as a result an unique infection ID is generated. It can uniquely identify each compromised machine.
This information can be used to identify if any security software can be bypassed. This is done by scanning the hard disk contents, memory, Windows Registry values and other sources for applications and services that can interfere with the proper virus execution. The list of affected software includes anti-virus products, firewalls, virtual machine hosts and debug environments. As soon as any of them are identified their real-time engines will be stopped, in other cases the whole applications can be removed altogether.
As soon as the .mdk4y ransomware has taken control of the computer it will be able to modify the system according to the built-in instructions of the hackers. One of the most popular actions is the installation of the threat as a persistent threat. This is done by modifying system settings, boot options and configuration files to make the malicious automatically to start once the computer is booted.
Interaction with the Windows Registry is also widely considered — changes made to strings belonging to the operating system can cause services to fail to start and severe performance and stability issues. On the other hand modifications to individual applications can render them unusable or to exit with unexpected errors. Corruption of user data is also possible.
Hooking up to existing processes is used to extract information about the user activities. Additionally advanced infections can start a Trojan infection which establishes a secure connection to a hacker-controlled service. It allows the criminals to spy on the victims, harvest the collected information and additionally take over control of the machines at any given time.
As this sample belongs to the Kraken ransomware family it is expected that it will be pushed via large-scale attack methods as soon as an upgraded version is ready.
.mdk4y Ransomware – Encryption Process
The .mdk4y ransomware follows the typical behavior as previously reported by the Kraken ransomware family. A powerful cipher will be used to encrypt sensitive data based on a list of target file extensions. Most of them will act against the following data:
- Archives
- Backups
- Databases
- Images
- Music
- Videos
All affected files will be assigned the .mdk4y extension indicating that they have been processed by the virus. A standard ransomware note will be created in a file called HOW_TO_RETURN_FILES.txt.
Remove .mdk4y Ransomwareand Try to Restore Data
If your computer system got infected with the .mdk4y ransomware virus, you should have a bit of experience in removing malware. You should get rid of this ransomware as quickly as possible before it can have the chance to spread further and infect other computers. You should remove the ransomware and follow the step-by-step instructions guide provided below.
Martin Beltov
Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.
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Step 1: Scan for .mdk4y ransomware with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall .mdk4y ransomware and related malware from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
Step 3: Clean any registries, created by .mdk4y ransomware on your computer.
The usually targeted registries of Windows machines are the following:
- 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
You can access them by opening the Windows registry editor and deleting any values, created by .mdk4y ransomware there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Step 4: Boot Your PC In Safe Mode to isolate and remove .mdk4y ransomware
Step 5: Try to Restore Files Encrypted by .mdk4y ransomware.
Method 1: Use STOP Decrypter by Emsisoft.
Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.
Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:
1 Right-click on the decrypter and click on Run as Administrator as shown below:
2. Agree with the license terms:
3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:
4. Click on "Decrypt" and wait for your files to be decoded.
Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.
Method 2: Use data recovery software
Ransomware infections and .mdk4y ransomware aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.
Simply click on the link and on the website menus on the top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.
.mdk4y ransomware-FAQ
What is .mdk4y ransomware Ransomware?
.mdk4y ransomware is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.
Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.
What Does .mdk4y ransomware Ransomware Do?
Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.
Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.
How Does .mdk4y ransomware Infect?
Via several ways..mdk4y ransomware Ransomware infects computers by being sent via phishing emails, containing virus attachment. This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.
Another way you may become a victim of .mdk4y ransomware is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.
How to Open ..mdk4y ransomware files?
You can't without a decryptor. At this point, the ..mdk4y ransomware files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.
What to Do If a Decryptor Does Not Work?
Do not panic, and backup the files. If a decryptor did not decrypt your ..mdk4y ransomware files successfully, then do not despair, because this virus is still new.
Can I Restore "..mdk4y ransomware" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore ..mdk4y ransomware files.
These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.
How To Get Rid of .mdk4y ransomware Virus?
The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.
It will scan for and locate .mdk4y ransomware ransomware and then remove it without causing any additional harm to your important ..mdk4y ransomware files.
Can I Report Ransomware to Authorities?
In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.
Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:
Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:
Germany - Offizielles Portal der deutschen Polizei
United States - IC3 Internet Crime Complaint Centre
United Kingdom - Action Fraud Police
France - Ministère de l'Intérieur
Italy - Polizia Di Stato
Spain - Policía Nacional
Netherlands - Politie
Poland - Policja
Portugal - Polícia Judiciária
Greece - Cyber Crime Unit (Hellenic Police)
India - Mumbai Police - CyberCrime Investigation Cell
Australia - Australian High Tech Crime Center
Reports may be responded to in different timeframes, depending on your local authorities.
Can You Stop Ransomware from Encrypting Your Files?
Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.
Can .mdk4y ransomware Ransomware Steal Your Data?
Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.
In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid.
Can Ransomware Infect WiFi?
Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.
Should I Pay Ransomware?
No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.
What Happens If I Don't Pay Ransom?
If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.
Can a Ransomware Attack Be Detected?
Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.
It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.
Do Ransomware Criminals Get Caught?
Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.
About the .mdk4y ransomware Research
The content we publish on SensorsTechForum.com, this .mdk4y ransomware how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.
How did we conduct the research on this ransomware?
Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.
Furthermore, the research behind the .mdk4y ransomware ransomware threat is backed with VirusTotal and the NoMoreRansom project.
To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.
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