How to remove Djvu virus and restore encrypted files

If you have suffered from a ransomware and you know that it is the Djvu ransomware – here you'll receive help. We offer plain and tested instructions on Djvu removal and possible ways to recover the encrypted information.

Djvu infection is the most dangerous thing that can happen to you on the Internet because a common user literally cannot get rid of it. The only event when you're able to defeat an encrypting virus is when you are not dealing with a true virus, but a fake, that covers the display and attempts to lure your funds. In all other cases, if ransomware was created and maintained in a right method – you should just hope that malware fighters can deal with it. If web-criminals failed somehow, and there are some vulnerabilities, which allow you to restore data – you'll find an answer in this article.

 

Ransomware

 

Djvu is built upon an absolutely legal encryption system that encrypts the files on user’s PC, so user can't use them in any approach. That key is encrypted too, but with a different algorithm. In most cases, swindlers favour RSA and AES manners, which have demonstrated themselves the very complex and fail-safe. The mentioned methods and the programs built upon them are freely available in the Net, so web-criminals just need to add defensive mechanisms, to restrict an access to a virus, and make the perfect update and control system. Some encrypting tools may function independently, and fraudsters know of another "client" as late as he contacts them and sets off his ransom. Other ransomwares are work in another way, and transmit data to thousands addresses, to confuse the malware-fighters and throw them off virus’ track.

 

Bypassing the ransomware’s kind, the RSA and AES methods are overly tricky difficult to bruteforce them. It can take centuries to execute all necessary operations on a standard device or, possibly, twenty or thirty years if you will use an industrial gear. We know only two effective methods to defeat a ransomware: to hack it, or break into its server, to receive a master key. Some viruses also have a breaker that can cease virus' activity completely or to make it pass a particular PC. If anyone finds that breaker for this ransomware, or develop a decryption software, we will update this article.

 

There are a few things to test, before you can yield and await for a decryptor. As it is written in previous paragraphs, fraudsters make failures, and certain peculiarities of your operating system might help you to restore data.

 

  • If you don't use the Windows from an admin entry – it's your lucky day. The point is that the operating system creates backups of all information before they’re eliminated or encrypted. Suchlike files are known as the SVC, and Djvu has the methods to delete them. If you're using the regular account – the operating system requests for a permission at the very moment Djvu tries to erase SVC. If you've seen suchlike request and declined it – your SVC are alright, and you should find a specialized software to recover the data.
  • If you've made a backup, stored on an external drive – you might eliminate a virus and upload it. Ensure that the ransomware is uninstalled completely, since if it’s not – all data will be corrupted instantly, with the files that were kept on a flash drive.

 

If all of written above advice didn't help and there is no possibility to restore corrupted information – you need to eliminate the ransomware from the PC and expect when a decryptor will be developed.

How to remove Djvu

As for the removal – there’s no possibility to totally elude an automatic mode. This virus is incredibly sly and there is a chance pass some parts and then regret it (it may happen if you line up an external data storage with the saved files to a not-totally-clean system). It knows how to hide pretty well, so you just can't eliminate it totally by hand. Here's your deletion guide that can suit all your needs. It contains some by-hand phases and an extra anti-viral tool step.

Removal instruction

If you are MAC user, follow this guide: how to decrypt files on MAC.

 

 

 

Step 1. Boot the system into safe mode

  • Press Start
  • Type Msconfig and press Enter

Safe mode. Step 1

 

  • Select Boot tab

Safe mode. Step 2

 

 

  • Select Safe boot and press Ok

More information about Safe mode: What is Safe Mode and how to boot computer in Safe Mode

 

Step 2. Show all hidden files and folders

  • Press Start
  • Click on Control Panel

Show hidden files. Step 1

 

  • Select Appearance and Personalization

Show hidden files. Step 2

 

  • Click on Folder Options
  • Select View tab
  • Select Show hidden files, folders and drives

Show hidden files. Step 3

 

  • Press Ok

 

Step 3. Remove virus files

 

Check next folders to find suspicious files:

  • %TEMP%
  • %APPDATA%
  • %ProgramData%

 

Step 4. Fix hosts file

  • Go to %SystemRoot%\System32\drivers\etc\ folder

Hosts_file_location

 

  • Open hosts file using Notepad or other text editor
  • Delete suspicious elements
  • Basic hosts file looks like this:

Hosts_file

 

Step 5. Clean registry (for experienced users)

  • Click Start
  • Type Regedit.exe and press Enter
  • Clean startup registry keys
  • HKEY_LOCAL_MACHINE(HKEY_CURRENT_USER)\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE(HKEY_CURRENT_USER)\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_LOCAL_MACHINE(HKEY_CURRENT_USER)\Software\Microsoft\Windows\CurrentVersion\RunServices
  • HKEY_LOCAL_MACHINE(HKEY_CURRENT_USER)\Software\Microsoft\Windows\CurrentVersion\RunServicesOnce
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit

Step 6. Scan computer with antivirus

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Step 7. Disable Safe Mode and restart computer

  • Press Start
  • Type Msconfig and press Enter
  • Select Boot tab
  • Remove the check near Safe boot

How to restore files

Since you cleared your device of Djvu, it's time for some file restoration. As we said earlier, if you use an admin account and you gave Djvu a pass into the PC – there is no manner to get back the data aside from the previously saved copies. If you use a common profile – you might have some chances, but you will need specific recovery program. The best ones of them are Recuva or ShadowExplorer tools. They're easy to download on their official pages, with close guides.

  • Click Start
  • Click Control Panel

Decrypt files. Step 1

 

  • Click System and Security

Decrypt files. Step 2

 

  • Select Backup and Restore

Decrypt files. Step 3

 

  • Select Restore files from backup
  • Select checkpoint to restore

 

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