.king_ouroboros Files Virus (Delta) – How to Remove It and Restore Data

.king_ouroboros Files Virus (Delta) – How to Remove It and Restore Data

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This article aims to help explain what is the Delta ransomware virus and show you how you can remove this ransomware infection from your computer plus how to restore encrypted files without paying ransom.

A new ransomware virus, going by the name .king_ouroboros has been detected by security researchers. The malware aims to encode the files on the computers and put an interfix extension .king_ouroboros in between the file name and the original suffix corresponding to it’s type. The malware displays a ransom note, demanding victims to pay $50 ransom to get their files to work once again. If your computer has been infected by the KingOuroboros ransomware we recommend that you read this article thoroughly, since it contains information on how you can remove this ransomware infection plus how you can restore your data.

Threat Summary

TypeRansomware, Cryptovirus
Short DescriptionAims to encrypt the files and hold them hostage until the victim pays $50 to the cyber-criminals.
SymptomsThe files on the affected computer are encrypted and no longer able to be opened. The file interfix .king_ouroboros is added to the encrypted files.
Distribution MethodSpam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by .king_ouroboros


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .king_ouroboros.
Data Recovery ToolWindows 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.

.king_ouroboros Files Ransomware – Distribution

The .king_ouroboros files virus is the type of ransomware virus which may enter your computer via more than one way. The main method which accounts to more than 80% of ransomware infections, like .king_ouroboros files virus use spam e-mails to infect computers. Such emails often pretend to be legitimate types of messages whose main goal is to deceive victims into either clicking on a malicious e-mail attachment or open a URL that causes the infection. The e-mails are designed so that they make it seem as if the malicious files are seemingly legitimate invoices, receipts and other forms of documents.

Furhtermore, besides this method, the ransomware creators may distribute the .king_ouroboros files virus as a result of different types of files that are directly uploaded online and pretending to be setups, patches, cracks, portable programs and many other files which users often download.

.king_ouroboros Files Virus – More Informaiton

The .king_ouroboros ransomware is the type of infection which aims to encrypt the files on the computers infected by it and then get users to pay ransom to get the files back. To read it’s end goal, the ransomware may go through different malicious activities it does on your computer. For starters upon infection, the .king_ouroboros ransomware may drop it’s malicious payload on the computers of victims:

  • %AppData%
  • %Local%
  • %LocalLow%
  • %Roaming%
  • %Temp%

After this is done, the .king_ouroboros files virus aims to perform multiple different types of actions, such as create mutants on your computer and interfere with the Run and RunOnce registry keys by creating entries in them with the location of the file encryption module which makes it to run on Windows Login. The sub-keys have the following locations:

→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

Once these Windows Registry sub-keys are modified, the .king_ouroboros files virus may also delete the backups on your computer and stop Windows Recovery services. This happens by running a script in Windows which executes some or all of the following commands in Windows Command Prompt:

→ sc stop VVS
sc stop wscsvc
sc stop WinDefend
sc stop wuauserv
sc stop BITS
sc stop ERSvc
sc stop WerSvc
cmd.exe /C bcdedit /set {default} recoveryenabled No
cmd.exe /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
C:\Windows\System32\cmd.exe” /C vssadmin.exe Delete Shadows /All /Quiet

In addition to this, the ransomware virus may also drop and execute it’s ransom note, it calls Delta. The ransom note lookslike the following:

Text from image:

The only way you can recover your files is to buy a decryption key

The payment method is: Bitcoin. The price is: $50 = Bitcoins

After buying the amount of bitcoins send an email

to [email protected] Your ID:

We will provide you with payment address and your decryption key.

You have 72 Hours to complete the payment oterwise your key will be deleted.

.king_ouroboros Ransomware – Encryption Process

In order to encrypt the files on your computer the .king_ouroboros file ransomware may check for the files beforehand. The files targeted by the ransomware are detected, based on their file extensions. The malware may scan for the most often used types of files, such as videos, documents, backups, images, audio files, archives and other files by checking the most often used file extensions:


After the files on the infected computer are encrypted, the ransomware virus may start to encrypt the files by overwriting data from their original structure code with encrypted data and then it ads the .king_ouroboros file interfix, making the encrypted files to appear like the following:

Remove .king_ouroboros Ransomware and Restore Your Files

In order for you to remove this virus from your computer, we recommend that you follow the manual and automatic removal instructions underneath this araticle. If manual removal represents a difficulty for you, it is reccomended to remove the .king_ouroboros ransomware automatically, preferrably by downloading and installing an advanced anti-malware software. Such program will effecitvely scan for the malicious files and remove them plus ensure that your computer is protected against future infections as well.

If you want to restore files, encrypted by .king_ouroboros ransomware, we advise that you try the alternative tools for file recovery underneath in step “2. Restore files, encrypted by .king_ouroboros Ransomware”.

Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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