Ransomware virus that encrypts the files on the infected computer, dubbed the KK virus because of the file extension it uses (KK_) has been reported to infect users on a massive scale. The virus uses a powerful encryption algorithm, which it claims to be RSA-1024 bit cipher. After encryption, the KK_ virus leaves a ransom note, named “KK_ IN YOUR DOCUMENTS.txt” in which the virus asks users to pay the insane payoff amount of 4 BitCoins to get decryption software for their files. Everyone who has become a victim of the KK_ ransomware is strongly advisable to be extremely careful and not pay any ransom to the cyber-criminals. Instead, we advise reading this article to learn more about KK_ ransomware, learn how to remove it and learn alternative methods to restore your files until a decryptor has been released.
|Type||Remote Access Trojan with file encryption capability.|
|Short Description||The ransomware encrypts files with a powerful encryption cipher, demanding users to pay the sum of 4 BTC to get the ransom ammount back.|
|Symptoms||The files encoded by the KK_ virus are reported to have the KK_ prefix in front of their name, for example “KK_Picture.jpg”|
|Distribution Method||Spam Emails, Email Attachments, File Sharing Networks.|
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|User Experience||Join our forum to Discuss KK_ Ransomware.|
|Data Recovery Tool||Windows 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.|
KK_ (Estonian) Virus – Distribution Methods
To successfully be spread, the KK_ ransomware virus may use several different methods, the most widely employed of which is the spam e-mail distribution campaigns. Such campaign may include the wide spreading of spam messages that include malicious e-mail attachments. Such e-mail attachments may contain various topics, like:
- “Your PayPal Receipt.”
- “Your Bank Account has been disclosed.”
- “Your order has been confirmed.”
In addition to these, a malicious e-mail attachment may be added which could resemble a document, like a Microsoft Office or Adobe file.
KK_ (Estonian) Ransomware In Details
After dropping it’s malicious files on the computer, the KK_ ransomware may also begin to employ modules that may perform different activities like modify the Run and RunOnce registry keys and delete any system backups, using the vssadmin delete shadows command. Not only this, but the KK_ ransomware may also cause a system restart so that it starts encrypting files on system boot, even before the antivirus software on the compromised machine runs.
Regarding file encryption, the KK_ ransomware uses a strong enough cipher to render the files impossible to directly decrypt in case you do not have the decryption key. The KK_ virus may begin to scan for the following types of files to encrypt them:
- Audio Files.
- Files associated with Microsoft Office.
- Files that are associated with Adobe Reader.
- Database files.
- Files belonging to widely used programs such as Adobe Photoshop, etc.
After it has successfully encrypted the files, the KK_ virus drops the following text file on the victim’s computer:
KK_ (Estonian) Ransomware – Remove It and Restore Encrypted Files
To remove KK_ ransomware fully from your computer, it is strongly advisable to follow the step-by-step instructions posted in this article below. They are methodologically arranged so that you can remove this virus manually as well as automatically in case you are unsure that you have fully deleted it. Malware researchers and security analysts strongly advise that you focus on removing KK_ ransomware using a malware removal tool. Such anti-malware software will not only swiftly delete KK_ virus from your PC but protect you in the future as well.
Files encrypted by KK_ ransomware may be difficult for decryption. This is because the virus has also been reported to send the decryption key to the cyber-criminals’ servers, making them the only holder of your files. However, malware analysts are constantly on the lookout for decryption opportunities, and we are going to notify you if there is a free decryptor released, by updating this article. Meanwhile, you may want to try using the alternative solutions in step “3.Restore files encrypted by KK_ Ransomware” below. They may help you restore some of your files, but they are not 100% guaranteed success.
Manually delete KK_ from your computer
Note! Substantial notification about the KK_ threat: Manual removal of KK_ requires interference with system files and registries. Thus, it can cause damage to your PC. Even if your computer skills are not at a professional level, don’t worry. You can do the removal yourself just in 5 minutes, using a malware removal tool.