.KOK08 Files Virus - Remove It and Restore Data

.KOK08 Files Virus – Remove It and Restore Data


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Our article provides an overview of .KOK08 files virus operations and it also may be helpful in attempting to remove the virus.

The so-called .KOK08 files virus invades computer systems with the purpose to corrupt system settings and then encrypt valuable files with the help of strong cipher algorithms. This in turn enables hackers to blackmail victims into paying a ransom for a unique decryption key. For the extortion, the ransomware uses a ransom note file called #KOK08_README#.rtf.

Threat Summary

TypeRansomware, Cryptovirus
Short DescriptionA data locker ransomware that encodes target files stored on the infected computer and then demands a ransom for a decryption key posessed by hackers.
SymptomsThe access to valuable files is restricted. They are all renamed with a string of extensions that ends with the .KOK08 extension. Hackers demand a ransom payment.
Distribution MethodSpam Emails, Email Attachments
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User ExperienceJoin Our Forum to Discuss KOK08.
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.

.KOK08 Files Virus – Distribution

How the infection code of .KOK08 files virus could be spread is via malspam e-mail campaigns. There are some common traits of e-mails that are used for malicious purposes and they are:

  • A presented link that lands on web page compromised by hackers. Such page could be set to download and execute the ransomware payload directly on the computer of each user who got tricked into visiting it.
  • A file attachment of familiar file type such as document (.doc, .PDF, .docx, .xlsx, etc.) archive (.rar, .zip, .7z, etc.) or other. Corrupted files could be masked as legitimate ones and in order to trick you into running the malicious code embedded in them they may be set to open after you perform several steps.

Along with this spread technique, other methods like malicious exploit kits, fake updates notifications and infected installers of third-party programs may be also used to scam you to allow the infection to plague your computer system.

.KOK08 Files Virus – Overview

The so-called .KOK08 files virus has been identified to belong to the ransomware family named Matrix. An infection with .KOK08 files virus begins after its payload is started on the system. The moment this event occurs is the moment when the ransomware becomes able to initiate a sequence of malicious actions that support the attack.

Once the ransomware establishes all needed malicious files on the system, by creating or dropping them from its command and control server, it starts to execute them consequently until it reaches the data encryption stage.

What its associated files are designed for is the contamination of major system components and their settings. In addition, some of them could be predetermined to manipulate legitimate system processes and with this enable the ransomware to prevent being detected by active security tools.

In case of infection with .KOK08 files virus it is likely that specific registry sub-keys will be also plagued by malicious values. These keys could be Run and RunOnce as they could execute the ransomware automatically on each system start.

Following encryption, the ransomware drops the file #KOK08_README#.rtf on the device to inform victims about its presence and blackmail them into paying certain ransom to hackers. At this point, it is only known that the contact email provided by cybercriminals is [email protected]. As of the ransom they demand it is likely that it should be in Bitcoin.

.KOK08 Files Virus – Encryption Process

Being a strain of Martix, .KOK08 ransomware could be set to use a combination of two or more sophisticated cipher algorithms to corrupt target files. And alike its predecessors .KOK08 ransomware could scan predefined system drives for all of the below mentioned file types in order to encode parts of their original code:

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

After this process, the access to the information stored by all these files remains restricted until the use of specialized decryption or recovery tool. How corrupted files could be recognized is by the distinctive sequence of extensions appended to their original names.

As identified after an analysis conducted by the security researcher Michael Gillespie this version of Matrix ransomware uses three extensions to mark corrupted data. The sequence begins with the contact email provided by hackers .[[email protected]] and ends with the specific .KOK08. Actually, the threat is named after its associated malicious extension.

As of the unique decryption key it is transferred to hackers controlled server immediately after the encryption process. And this unpleasant issue enables them to blackmail you into paying a demanded ransom. However, you should avoid doing this as such an action does not guarantee the recovery of your encrypted files.

Remove Scarab-Walker Ransomware and Restore .JohnnieWalker Files

Below you could find how to remove Scarab-Deep step by step. To remove the ransomware manually you need to have a bit of technical experience and ability to recognize traits of malware files. Beware that ransomware is a threat with highly complex code that plagues not only your files but your whole system. So as recommended by security researchers you need to utilize an advanced anti-malware tool for its complete removal. Such a tool will keep your system protected against devastating threats like Scarab-Deep and other kinds of malware that endanger your online security.

After you remove the ransomware make sure to check the “Restore Files” step listed in the guide below. But before you take any further actions, don’t forget to back up all encrypted files to an external drive in order to prevent their irreversible loss.

Note! Your computer system may be affected by KOK08 and other threats.
Scan Your PC with SpyHunter
SpyHunter is a powerful malware removal tool designed to help users with in-depth system security analysis, detection and removal of threats such as KOK08.
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.

To remove KOK08 follow these steps:

1. Boot Your PC In Safe Mode to isolate and remove KOK08 files and objects
2. Find files created by KOK08 on your PC

Use SpyHunter to scan for malware and unwanted programs

3. Scan for malware and unwanted programs with SpyHunter Anti-Malware Tool
4. Try to Restore files encrypted by KOK08
Gergana Ivanova

Gergana Ivanova

Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections. She believes that in times of constantly evolving dependency of network connected technologies, people should spread the word not the war.

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