Efdc Virus


Efdc is a virus infection known as Ransomware that employs a secret data-encryption algorithm to block important user data. The purpose of Efdc is to coerce its victims into making a ransom payment by using their locked data as leverage.


The Efdc ransomware will leave a _readme.txt file with instructions

This blackmailing scheme is nothing new, but the fact that each week tens of new Ransomware versions are created keeps it alive. The fact that Ransomware, as a whole, is one of the most difficult to deal with categories of malware doesn’t help either.

At first glance, a Ransomware virus such as Efdc, Lqqw, Orkf  may not seem like a very dangerous piece of malware. All it can do is lock some data on the infected computer. Other than that, the virus doesn’t harm the system, it doesn’t spy on the user, and it doesn’t exploit the computer’s resources. As long as you don’t keep sensitive and important data on your machine or as long as your valuable files have been properly backed up on external drives or on a cloud, the attack of this virus won’t be particularly difficult to take care of. The presence on the computer of important data that hasn’t been backed up, however, is exactly the reason why, in practice, Ransomware is one of the scariest forms of computer threats. The majority of users stand to lose some pretty important files (which they have forgotten to back up) if they are unable to deal with a virus like Efdc. If you are among those users, be sure to carefully read the next lines so that you can make a rational choice about what to do next instead of acting out of impulse and inadvertently making the situation worse than it needs to be.

The Efdc virus

The Efdc virus is a harmful computer program specialized in taking important files hostage and blackmailing its victims for access to said files. The Efdc virus remains unnoticed during the initial phase of its attack and later reveals itself via a ransom note.

Efdc virus

The Efdc virus will encrypt your files

This ransom note tells the user how they are supposed to make a payment to the hackers and get their files restored afterward said payment. Trusting the hackers with your money, however, is unwise, as you may simply lose this money and still be left with nothing that can bring your files to their accessible state.

The .Efdc file encryption

The .Efdc file encryption is the code that this virus uses to lock your important files, making them unusable to you. The .Efdc file encryption has a private key that you need in order to access any of the encrypted files.

Since we already established it is not a good idea to pay the hackers for this key, our suggestion is to remove the virus instead and then try all available alternatives that may help with the recovery of the encrypted data. Instructions on how to remove Efdc as well as a number of  free alternative recovery suggestions can be found in our guide.


Name Efdc
Type Ransomware
Detection Tool

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Remove Efdc Ransomware


A system reboot in Safe Mode will be required in order to successfully complete the next steps in this guide. Therefore, if you don’t want to lose the instructions, we first recommend you to bookmark this page in your browser.



Once the computer is successfully rebooted in Safe Mode, click on the Start button in the bottom left corner and type msconfig in the search field. Press enter, and a System Configuration window will open:


Select Startup and carefully search if there are some suspicious-looking startup items in the list. In case you detect an item that has “Unknown” Manufacturer, a random name or anything that suggests that it might be linked to Efdc, it is a good idea to research it online and remove its checkmark if you find out that it is dangerous.

Before you close the window, make sure that you leave only legitimate processes in the Startup and click OK to save your changes.


Next, on your Desktop, use the CTRL, SHIFT and ESC key combination to open the Task Manager. In it, click on the Processes Tab and carefully search for processes that might be malicious. The first thing that might indicate a ransomware-related activity is the high CPU and Memory usage. Another thing is the name of the process – it may contain random characters or try to mimic the name of a legitimate process but with a twist in the letters.

If you spot anything suspicious, the best way to decide if it needs to be stopped is to right-click on it, select Open File Location and scan the files stored there with a powerful online virus scanner.


If you don’t have a powerful scanner at hand, feel free to use our online virus scanner below:

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    If the files that you scan turn out to be infected, this is a sure sign that you need to end the process related to them and delete those files and their folders. 

    A compromised computer is an easy target for hacking. A quick check of the content in your Hosts file can tell you if your computer is hacked. Here is how to do that:

    First,  copy the following:

    notepad %windir%/system32/Drivers/etc/hosts

    Next, paste it in the search bar of the Start menu and press Enter.

    A Notepad file named Hosts will open on the screen. Scroll the text down and find where it is written Localhost.

    If you are hacked, this is the place where you will see dozens of suspicious IP addresses added in the file:

    hosts_opt (1)

    If you see nothing unusual, then simply close the Hosts file without doing nothing. If, however, you detect virus creator IP in your file, it is best to copy them and write to us in the comments. A member of our team will take a look at the questionable IP addresses and let you know what to do.

    Next, when you close the Hosts file, head to the Start menu search bar and type each of the lines below exactly as they are shown. After typing each of them, press Enter to open the location.

    1. %AppData%
    2. %LocalAppData%
    3. %ProgramData%
    4. %WinDir%
    5. %Temp%
    Search for any recently added files and folders in each of the listed locations and if you believe that something is related to the ransomware infection, delete it.  Just make sure you don’t delete legitimate entries, as this may affect your system. As far as the files stored in Temp are concerned, it is best to select them all and delete them without hesitation. These are all temporary files, some of which may have been added by Efdc, therefore, they should be removed.

    In the final step, to ensure that the ransomware traces have been removed completely from your PC, you need to check your registry for entries that might be linked to the infection.

    To do that, you need to start the Registry Editor which can be done by directly typing Regedit in the search bar of the Start menu and pressing Enter

    Next, inside the Editor, press CTRL and F from the keyboard and type the name of the ransomware infection in the Find box. Then, search for entries that are matching that name and carefully delete them, if you find any.

    Here, the most important thing that you need to keep in mind is to delete only entries that you are 100% sure about. If you delete something that is not related to the ransomware, you may end up corrupting your system and its software. To avoid the risk, please use the professional removal software linked on this page. Also, feel free to write to us if you run into any trouble.  How to Decrypt Efdc files File-decryption attempts should be undertaken only after you have fully removed Efdc from the system. A detailed guide on how to decrypt your files with suggestions and alternative methods for file-recovery can be found here. Feel free to check it out and let us know in the comments if you have any questions.

    What is Efdc?

    Efdc is a harmful program used by its creators for blackmailing and money extortion. The way Efdc operates is by secretly placing encryption on the user’s most valuable data and then demands a ransom payment from its victim, offering the decryption key in return. Although Efdc itself doesn’t harm the system or the files it encrypts, it’s not uncommon for threats like it to come together with another piece of malware, such as a Rootkit or a Trojan Horse. Those other malware pieces could actually be damaging to the system, so you must not waste any time if your system has been attacked and take the necessary mitigating actions that would hopefully ameliorate this unpleasant situation. If you keep regularly updated backups of your important files or if there is no important data on the infected computer, then the harmful effect of the Ransomware would be greatly reduced. Still, you must ensure that the threat gets eliminated ASAP to secure the system.

    Is Efdc a virus?

    Efdc is a virus variant of the file-encrypting Ransomware category – a type of malware threats used for encrypting important data and blackmailing its owners. The Efdc virus can be introduced to the system via a hidden Trojan Horse infection that secretly downloads the Ransomware. After the encrypting process of your files has been completed, the malware would automatically make its presence known to you by creating a notepad file or displaying a big banner on your screen. The purpose of the notepad file/the on-screen banner is to inform you about the ransom that the hackers demand in exchange for the private key that can unlock your files. Most Ransomware viruses demand that the ransom is paid in Bitcoin or another popular virtual currency, as this makes it unlikely that the transaction would be traced to the hackers by any law-enforcement agencies. Instructions on how to acquire the specified currency and how to send it to the hackers are usually provided in the ransom note.

    How to decrypt Efdc files?

    To decrypt Efdc files, we advise you to try the alternative recovery methods available to you rather than pay the ransom. If you pay the ransom to decrypt Efdc files, you could lose a lot of money and still not get anything in return. There are a lot of risk factors related to the ransom payment option. One obvious problem is that the hackers cannot be forced to send you the decryptor key, and so if they decide not to keep the key, there’s nothing you can do about it. Also, even if you receive a key from them after you pay, the key could be corrupted and not function as intended, leaving your files locked. A third possibility is if the blackmailers are no longer using the virtual wallet that was included in the ransom note from Efdc, so you may end up wasting your money by sending it to another person.


    About the author


    Brandon Skies

    Brandon is a researcher and content creator in the fields of cyber-security and virtual privacy. Years of experience enable him to provide readers with important information and adequate solutions for the latest software and malware problems.


    • Hi, my pc got attacked by efdc randomware recently and i am planning to reformat the entire pc. However the ransomware seems to be already in one of my external harddrive. What are the best solutions that you recommend doing now in order to preserve the files in my external harddrive?

      • Hi Jj,
        first you have to figure out if you have been encrypted by the online variant or the offline. If you have been encrypted by the online variant, decryption is impossible, but if it is the offline variant i suggest to you to use the Emsisoft Decryptor that you can find on this page

    • localhost name resolution is handled within DNS itself.
      # localhost
      # ::1 localhost na1r.services.adobe.com hlrcv.stage.adobe.com lmlicenses.wip4.adobe.com lm.licenses.adobe.com activate.adobe.com practivate.adobe.com genuine.adobe.com prod.adobegenuine.com practivate.adobe.com ereg.adobe.com activate.wip3.adobe.com wip3.adobe.com 3dns-3.adobe.com 3dns-2.adobe.com adobe-dns.adobe.com adobe-dns-2.adobe.com adobe-dns-3.adobe.com ereg.wip3.adobe.com activate-sea.adobe.com wwis-dubc1-vip60.adobe.com activate-sjc0.adobe.com

    • PLZ HELP…..

      My all data files are encrypted by hacker with ransomware attack

      File Extension After encryption:- [email protected]

      Hacker provided NOTE

      All of your files have been encrypted
      Your computer was infected with a ransomware delta virus.
      Your files have been encrypted and you won’t
      be able to decrypt them without our help.What can I do to get my files back?
      You can buy our special
      decryption software, this software will allow you to recover all of your data and remove the
      ransomware from your computer.
      The price for the software is $1,500. Payment can be made in Bitcoin only.
      How do I pay, where do I get Bitcoin?
      Purchasing Bitcoin varies from country to country, you are best advised to do a quick
      google search yourself to find out how to buy Bitcoin.

      Contact: [email protected](.)com
      Payment information Amount: 0,031 BTC
      Bitcoin Address: 1Faiem4tYq7JQki1qeL1djjenSx3gCu1vk

    • Hi,
      My files are hacked with the efdc virus. I can’t open them.
      I have tried to remove the virus off my computer, which is now successful. However, I can’t restore my files (decrypting it).
      I have checked my personal ID, which ends in a t1, meaning it is an offline key. However, when I downloaded the Emsisoft decryption tool, it said decryption is impossible and that an online id is used.
      What should I do?

      • Hi Bella,
        if Emsisoft Decrypter says its online then you can’t do anything and unfortunately the decryption is impossible.

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