What is KOK8 ransomware?
KOK8 ransomware-virus has been detected at the end of December 2021. IT experts discovered that KOK8 ransomware is a new version of Matrix ransomware. Like its more popular predecessor, it uses encryption algorithms to lock users’ personal files such as photos, videos, documents, archives, databases, and similar. When all files and documents are locked, criminals demand money in Bitcoin cryptocurrency. However, we don’t recommend you to pay them money as there is a high risk of getting scammed by virus authors. Thus, you can be left with no money and a decryption tool. Instead, you may follow this guide to completely remove KOK8 ransomware and decrypt .KOK8 files for free.
Once the encryption procedure is done, all infected files will be renamed according to the following pattern: [KOK8@protonmail.com].[random_characters].KOK8. Afterward, KOK8 ransomware leaves #KOK8_README#.rtf file that contains kidnappers’ demands. Cybercriminals urge users to contact them via email to get further instructions from cybercriminals:
HOW TO RECOVER YOUR FILES INSTRUCTION
We are realy sorry to inform you that ALL YOUR FILES WERE ENCRYPTED
by our automatic software. It became possible because of bad server security.
Please don’t worry, we can help you to RESTORE your server to original
state and decrypt all your files quickly and safely!
Files are not broken!!!
Files were encrypted with AES-128+RSA-2048 crypto algorithms.
There is no way to decrypt your files without unique decryption key and special software. Your unique decryption key is securely stored on our server. For our safety, all information about your server and your decryption key will be automaticaly DELETED AFTER 7 DAYS! You will irrevocably lose all your data!
* Please note that all the attempts to recover your files by yourself or using third party tools will result only in irrevocable loss of your data!
* Please note that you can recover files only with your unique decryption key, which stored on our side. If you will use the help of third parties, you will only add a middleman.
HOW TO RECOVER FILES???
Please write us to the e-mail (write on English or use professional translator):
You have to send your message on each of our 3 emails due to the fact that the message may not reach their intended recipient for a variety of reasons!
In subject line write your personal ID:
We recommed you to attach 3 encrypted files to your message. We will demonstrate that we can recover your files.
* Please note that files must not contain any valuable information and their total size must be less than 5Mb.
Please be sure that we will find common languge. We will restore all the data and give you recommedations how to configure the protection of your server.
We will definitely reach an agreement 😉 !!!
If yоu did nоt rеcеivе thе аnswеr frоm thе аfоrеcitеd еmаils fоr mоrе then 24 hours please sеnd us Bitmеssаgеs frоm а wеb brоwsеr thrоugh thе wеbpаgе hxxps://bitmsg.me. Bеlоw is а tutоriаl оn hоw tо sеnd bitmеssаgе viа wеb brоwsеr:
1. Оpеn in yоur brоwsеr thе link hxxps://bitmsg.me/users/sign_up аnd mаkе thе rеgistrаtiоn bу еntеring nаmе еmаil аnd pаsswоrd.
2. Уоu must cоnfirm thе rеgistrаtiоn, rеturn tо уоur еmаil аnd fоllоw thе instructiоns thаt wеrе sеnt tо уоu.
3. Rеturn tо sitе аnd сlick “Lоgin” lаbеl оr usе link hxxps://bitmsg.me/users/sign_in, еntеr уоur еmаil аnd pаsswоrd аnd click thе “Sign in” buttоn.
4. Сlick thе “Сrеаtе Rаndоm аddrеss” buttоn.
5. Сlick thе “Nеw mаssаgе” buttоn.
6. Sеnding mеssаgе:
Tо: Еntеr аddrеss: BM-2cXRWRW5Jv5hxbhgu2HJSJrtPf92iKshhm
Subjесt: Еntеr уоur ID: 2DE778C940E95E52
Mеssаgе: Dеscribе whаt уоu think nеcеssаrу.
Сlick thе “Sеnd mеssаgе” buttоn.
We strongly recommend not to comply with their requirements because there are no guarantees that you will obtain your files when the transaction happens. On the contrary, there is a high risk of being deceived and simply left with nothing. The only reliable way to solve the problem is to remove KOK8 ransomware from the system using appropriate software in order to stop the malicious actions of the virus and then restore your data from the backup.
There are two solutions to remove KOK8 Ransomware and decrypt your files. The first is to use an automated removal tool. This method is suitable even for inexperienced users since the removal tool can delete all instances of the virus in just a few clicks. The second is to use the Manual Removal Guide. This is a more complex way that requires special computer skills.
How KOK8 ransomware gets on my computer?
Cybercriminals use various techniques to deliver the virus to the target computer. Ransomware viruses can infiltrate victims’ computers more than in one or two ways, in most cases, cryptoviral extortion attack is carried out with the help of the following methods:
- This is the most used distribution method. Cybercriminals use fraudulent emails to pose as official organizations or business companies (receipts, winning notifications, confirmation of order; bank messages, and so on) to lure unsuspecting users into clicking on a malicious attachment – just one click to make your files inaccessible. To mislead the user and make it look like an official email, cybercriminals add an extra symbol to the email address, for example, instead of firstname.lastname@example.org, you may see service[.]@paypal.com or service[_]@paypal.com. That’s why you should always pay attention to received emails and identify the sender to make sure that this is from a trusted source. Also, the presence of grammatical and typographical errors in the text of the message indicates that this is fake. If nothing’s wrong, scan attachment with antivirus software first and then you can open it. Compliance with all these rules will help you save a lot of nerve, time, and money.
- Hackers use the special toolkit to exploit known vulnerabilities in systems or applications. That’s why you should always make Windows updates on time and keep them up to date. Remember that these updates close the security holes in the system through which the virus can enter your computer. Make sure that your operating system itself is not outdated and is officially supported, for example, Windows XP, Vista, 7 are no longer supported.
- Various dubious web-sources can contain malicious scripts or hyperlinks that can infect your system. Our advice – avoid visiting P2P sites and websites with illegal content (pirated software, movies, music). Use only legitimate services and remember – there’s no free lunch in this world.
- Cybercriminals often abuse the built-in Windows feature – Remote Desktop Protocol to infect a computer with ransomware. That way, they access the target computer remotely and install the virus manually. To avoid infection via RDP, you should set a different from 3389 TCP port and use a more strong password.
|Type of threat||Ransomware, cryptovirus, file-locking virus|
|Contactemail@example.com, firstname.lastname@example.org, email@example.com, websites|
|Detections||BitDefender (Generic.Ransom.Matrix.BB5F8475), ESET-NOD32 (|
A Variant Of Win32/Filecoder.LockedFile.I), Avast (Win32:RansomX-gen [Ransom]), more detections (VirusTotal)
|Distribution||Spam email attachments, RDP, pirated software, torrent websites, phishing sites|
In order to completely remove ransomware from your computer, you will need to install an antivirus software. We recommend using SpyHunter
The only effective method to restore files is to copy them from a saved backup. If you don’t have a suitable backup, you may use third-party recovery software such as Stellar Data Recovery
How to remove KOK8 ransomware?
Try Stellar Data Recovery
Stellar Data Recovery is one of the most effective tools that can recover lost and corrupted files — documents, emails, pictures, videos, audio files, and more — on any Windows device. The powerful scan engine can detect compromised files and finally save them to specified destination. Despite its advancedness, it’s very concise and simple so that even the most inexperienced user can figure it out.
Email security is the first line of defense against ransomware viruses. To do this, we recommend that you use MailWasher. MailWasher blocks ransomware viruses coming through spam and phishing, and automatically detects malicious attachments and URLs. In addition, malicious messages can be blocked even before the recipient opens them. Since the main source of the spread of ransomware viruses are infected emails, antispam significantly reduces the risk of a virus appearing on your computer.
After the virus is completely removed from your system, you can begin the process of restoring your files.
How to decrypt .KOK8 files?
Method 1. Restore your files with the help of Recovery Tool
In case your PC has been attacked by ransomware, you may restore your files by using file recovery software. Stellar Data Recovery is one of the most effective tools that can recover lost and corrupted files — documents, emails, pictures, videos, audio files, and more — on any Windows device. The powerful scan engine can detect compromised files and finally save them to specified destination. Despite its advancedness, it’s very concise and simple so that even the most inexperienced user can figure it out.
- Run Stellar Data Recovery.
- Select type of files you want to restore and click Next.
- Select the drive and folder where your files are located and date that you want to restore them from and press Scan.
- Once the scanning process is done, click Recover to restore your files.
- After this, select a destination and click Start Saving to save restored data.
Since new ransomware-type viruses appear almost every day, there is no technical possibility to issue a decryptor for each virus. In this case, the recovery tool comes to the rescue. Despite the fact that this is one of the most effective methods in the absence of a decryptor, this is not 100 percent and not the only way.
Method 2. Restore the system using System Restore
Although the latest versions of KOK8 Ransomware can remove system restore files, this method may help you partially restore your files. Give it a try and use standard System Restore to revive your data. The entire process is preferably carried out in Safe Mode with Command Prompt:
For Windows XP/Vista/7 users:
Restart your computer and before your system starts – hit F8 several times. This will prevent system from loading and will show Advanced boot options screen. Choose Safe mode with Command Prompt option from the options list using up and down arrows on your keyboard and hit Enter.
For Windows 8/10 users:
- Click the Start button, then select Settings
- Click Update & Security, then select Recovery and click Restart now.
- After your device reboots, go to Troubleshoot > Advanced options >Startup Settings > Restart
- After your PC restarts, you should press F5 key to Enable Safe Mode with Command Prompt.
After the system is loaded in Safe Mode with Command Prompt, do following:
- In the Command Prompt window, type cd restore and hit Enter.
- Then type rstrui.exe and hit Enter again.
- Once a new window shows up, click Next.
- Choose the date before the infection appearance and click Next again
- In the opened pop-up window, click Yes to start system restore.
Method 4. Roll the files back to the previous version
Previous versions can be copies of files and folders created by Windows Backup (if it is active) or copies of files and folders created by System Restore. You can use this feature to restore files and folders that you accidentally modified or deleted, or that were damaged. This feature is available in Windows 7 and later versions.
- Click the encrypted file and choose Properties
- Open the Previous Version tab
- Select the latest version and click Copy
- Click Restore
How to prevent your system from Ransomware?
No one is safe from infection with a virus that secretly encrypts your data. But in order to minimize this risk, you need to follow the rules:
1. Always make Windows updates on time and keep them up to date. Remember that these updates close the security holes in the system through which the virus can enter your computer.
2. The most efficient way to avoid data loss is of course to make a backup of all important data from your computer. It is enough just to synchronize the necessary folders with one of the cloud services, so as not to be afraid to see the text requiring the payment of bitcoins in exchange for a decryption key. It can be a cloud or a remote hard drive on the network. If you store all your files on the Internet, the likelihood of virus infection will be lower. Do not make copies to external hard drives, as this could damage them.
3. Since spam email is the most popular form of spreading ransomware-type viruses, the user should never open email attachments without first having scanned them with antivirus. Just clicking on the link or opening the attachment can damage the operating system (Windows) in a few minutes, damage important data and infect other machines with the virus.
4. All previous methods do not matter if you do not have a reliable antivirus. The presence of anti-virus protection on your computer can prevent all these unpleasant surprises. Anti-virus protection will protect you from malware, money loss, time loss, invasion of your personal life. Now the antivirus market is so huge that it is difficult to make a choice in favor of one of them. If you have not decided who to give preference to, we suggest you familiarize yourself with our Top 5 Antivirus Software for Windows