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Efdc Virus Files

What is Efdc Virus?

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Efdc virus is one more malicious program that has emerged as a strain of the infamous STOP/Djvu ransomware. The infection is programmed to damage system settings and personal files in order that victims become more prone to pay a ransom fee to hackers.

This ransomware utilizes Advanced Encryption Standard (AES) or RSA cryptography algorithms for encrypting target files stored on victims’ machines. Hence, it is capable of leaving encrypted files completely inaccessible. The outcome of the impact caused by this ransomware is ransom fee extortion.

For the decryption of .efdc files, victims are requested to pay ransom to hackers. This is what the ransom message _readme.txt informs. It could be placed on the desktop as well as in folders with encrypted files.

Note that a ransom payment is highly inadvisable. There is no guarantee that hackers will act as they promise.

Discover all the issues that occur in case of infection with the Efdc virus and learn how to fully get rid of malicious files. For the recovery of .efdc files, check out the very end of the guide.

Efdc virus Summary

Name Efdc also known as UDS:Trojan-Ransom.Win32.Stop.gen (Kaspersky), Trojan:Win32/Sabsik.FL.B!ml (Microsoft), STOP.GP Ransomware (SpyHunter)
Type Ransomware, Cryptovirus
Malicious Extension .Efdc virus
Short Description A data locker ransomware that utilizes AES cihper algorithm to encrypt important files stored on infected devices. To decrypt files it demands a ransom payment.
Symptoms Important files are corrupted and inaccessible. They are all renamed with the .efdc extension. A ransom note appears on the PC to extort a ransom.
Ransom Demaning Note _readme.txt
Distribution Method Spam Emails, Email Attachments, Torrent Files
Detection Tool See If Your System Has Been Affected by malware

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Malware Removal Tool

In-depth Efdc Virus Analysis

How does Efdc ransomware virus obtain access to computer systems? Via its dropper that can be delivered by shady techniques like spam emails, rogue apps, fake updates, corrupted sites, and torrent downloads. Typically, the activation remains unnoticed.

Since hackers tend to bet on spam emails mainly, be careful when you open the newly received emails in your inbox. Some of them may be designed to resemble the templates of the emails sent by legitimate businesses, sites, and institutions. Instead of informing you, they could trick you to infect your PC with a nasty virus like Efdc.

Infection with Efdc virus leads to the activation of various malicious files on the system. Similar to previous STOP ransomware strains (.orkf, .lqqw), the Efdc virus is likely to use the following system folders for the storage of its malicious files and objects:

  • %Temp%
  • %Roaming%
  • %UserProfile%
  • %AppData%

Then the ransomware interferes with specific system registries to obtain a higher level of persistence. By adding malicious values in the Windows Registry, the threat ensures that its files will load automatically every time the infected OS runs. Certain changes enable the Efdc virus is to open its ransom note after it completes the encryption process.

This ransomware is configured to mark all files it corrupts with an extension of the same name. For example, the file image.jpg will be renamed to imaje.jpg.efdc. Unfortunately, the following files may no longer be accessible:

  • Audio files.
  • Video files.
  • Document files.
  • Image files.
  • Backup files.
  • Banking credentials, etc.

After encryption, the file _readme.txt will appear on the system. It contains a ransom message. Here is how it appears when opened on an infected device:

STOP ransomware virus ransom message

Apparently, hackers demand a ransom fee in exchange for the decryption key and tool for .efdc files. Probably they will want to transfer the amount in cryptocurrency.

Beware that paying the ransom does not guarantee the recovery of your encrypted files. That’s why we advise you to attempt to secure the infected system by using the help of reliable tools and try alternative solutions for the recovery of your valuable files.

Remove Efdc Virus and Try to Restore Files

Efdc ransomware virus is a threat with highly complex code. It corrupts both system settings and valuable personal data. The only way to use your infected system in a secure manner again is to remove all malicious files and objects created by this ransomware.

For this purpose, you could use our ransomware removal guide. The guide reveals how to clean and secure your system step by step. In addition, you will see a few alternative data recovery approaches. They may be helpful while you are attempting to restore files encrypted by Efdc virus. Do not forget to back up all encrypted files to an external drive before initiating a recovery process.

Gergana Ivanova

Highly motivated writer with 5+ years of experience writing for ransomware, malware, adware, PUPs, and other cybersecurity-related issues. As a writer, I strive to create content that is based on thorough technical research. I find joy in the process of creating articles that are easy to understand, informative, and useful. Follow me on Twitter (@IRGergana) for the latest in the field of computer, mobile, and online security.

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  • Step 1
  • Step 2
  • Step 3
  • Step 4
  • Step 5

Step 1: Scan for Efdc virus with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

scan for and delete ransomware virus step 2


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

scan for and delete ransomware virus step 3


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

scan for and delete ransomware virus step 4

If any threats have been removed, it is highly recommended to restart your PC.

Ransomware Automatic Removal - Video Guide

Step 2: Uninstall Efdc virus 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:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.
delete ransomware from windows step 1


2. In the field type in "appwiz.cpl" and press ENTER.
delete ransomware from windows step 2


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
delete ransomware from windows step 3Follow the instructions above and you will successfully delete most unwanted and malicious programs.


Step 3: Clean any registries, created by Efdc virus 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 Efdc virus there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.
delete ransomware virus registries step 1


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.
delete ransomware virus registries step 2


3. You can remove the value of the virus by right-clicking on it and removing it.
delete ransomware virus registries step 3 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.

IMPORTANT!
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 Efdc virus

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows Key + R.
remove ransomware in safe mode step 1


2. The "Run" Window will appear. In it, type "msconfig" and click OK.
remove ransomware in safe mode step 2


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
remove ransomware in safe mode step 3
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.
remove ransomware in safe mode step 4


5. You can recognise Safe Mode by the words written on the corners of your screen.
remove ransomware in safe mode step 5


Step 5: Try to Restore Files Encrypted by Efdc virus.

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:

stop ransomware decryptor step 1

2. Agree with the license terms:

stop ransomware decryptor step 2

3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:

stop ransomware decryptor step 3

4. Click on "Decrypt" and wait for your files to be decoded.

stop ransomware decryptor step 4

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 Efdc virus 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.

1. Download the recommended Data Recovery software by clicking on the link underneath:

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.


Efdc virus-FAQ

What is Efdc virus Ransomware?

Efdc virus 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 Efdc virus 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 Efdc virus Infect?

Via several ways.Efdc virus 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 Efdc virus 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 .Efdc virus files?

You can't without a decryptor. At this point, the .Efdc virus 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 .Efdc virus files successfully, then do not despair, because this virus is still new.

Can I Restore ".Efdc virus" Files?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Efdc virus 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 Efdc virus 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 Efdc virus ransomware and then remove it without causing any additional harm to your important .Efdc virus 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 Efdc virus 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 Efdc virus Research

The content we publish on SensorsTechForum.com, this Efdc virus 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 Efdc virus 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.


As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.

1 Comment
  1. Sab

    Merci. J’ai suivi toutes les étapes et j’ai récupéré mes données avec EaseUs seulement aucune de ces données ne se trouve en bon état. Donc c’est une situation désespérée avec ce virus.

    Reply

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