DED Cryptor Ransomware

Also Known As: DED Cryptor virus
Distribution: Low
Damage level: Severe

DED Cryptor ransomware removal instructions

What is DED Cryptor?

DED Cryptor is a ransomware-type virus developed using open-source ransomware called 'EDA2', which is written in the C# programming language. After system infiltration, DED Cryptor encrypts various files stored on the computer. During encryption, this ransomware appends the name of each encrypted file with a .ded extension. Following successful encryption, DED Cryptor changes the desktop wallpaper and opens an image.

Both the desktop wallpaper and opened image are identical, and contain a message stating that the victim's files have been encrypted. To restore them, the victim must pay a ransom of 2 Bitcoins (~$1474.64) and contact the email address provided (dedcrypt(@)sigaint.org) to receive payment instructions. It is also stated that the decryption key is only valid for 24 hours. DED Cryptor uses an asymmetric encryption algorithm to compromise files. Therefore, two keys (public for encryption, and private for decryption) are generated during the encryption process. The private key is stored on Command and Control (C&C) servers belonging to cyber criminals. Unfortunately, decryption without this key is impossible. Therefore, developers of DED Cryptor attempt to sell this key to victims. Be aware, however, that cyber criminals are likely to ignore victims, despite payments made. Therefore, you should never pay any ransoms or attempt to contact these people. In doing so, you will support their malicious businesses and lose your money. There currently are no tools capable of restoring files encrypted by DED Cryptor. Therefore, you can only restore your files/system from a backup.

Screenshot of a message encouraging users to contact the developers of DED Cryptor ransomware to decrypt their compromised data:

DED Cryptor decrypt instructions

This ransomware shares many similarities with CryptoWall, Cerber, RAA, CTB-Locker, and dozens of other viruses. All have identical behavior - they encrypt victims' files and make ransom demands. There are just two noticeable differences - size of ransom and encryption algorithm used. Even the distribution methods are identical. Ransomware-type viruses are often distributed using fake software updaters, peer-to-peer (P2P) networks, infectious email attachments, and trojans. Therefore, using a legitimate anti-virus/anti-spyware suite and keeping your installed software up-to-date is very important. Furthermore, never open any attachments sent from unrecognized email addresses and download your desired files/software from trusted sources.

Screenshot of an image displayed immediately after encrypting files:

DED Cryptor image

Screenshot of files encrypted by DED Cryptor:

Files encrypted by DED Cryptor ransomware

DED Cryptor targets the following file types:

.txt, .doc, .docx, .xls, .xlsx, .ppt, .pptx, .odt, .jpg, .png, .csv, .sql, .mdb, .sln, .php, .asp, .aspx, .html, .xml, .psd, .dll, .lnk, .pdf

DED Cryptor ransomware removal:

Instant automatic removal of DED Cryptor virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of DED Cryptor virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the DED Cryptor virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the DED Cryptor ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining DED Cryptor ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of DED Cryptor are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by DED Cryptor, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encrypting ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and Malwarebytes Anti-Ransomware, which artificially implant group policy objects into the registry to block rogue programs such as DED Cryptor ransomware.)

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove DED Cryptor ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
DED Cryptor virus QR code
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Platform: Windows

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