Djvu VirusRansomwareRemoval Guide

Kaaa Virus Removal Guide (+Decrypt .kaaa files)

Kaaa Virus – Details

Kaaa is a harmful software working as common ransomware. Michael Gillespie, the widely known malware researcher, first found this new name in the DJVU ransomware family.

Kaaa was created for the sole function to encrypt all popular file types. Logically, as soon as the file encryption is successfully accomplished, the users are unable to get access to them. Kaaa virus adds its own “.kaaa” to all the encrypted files. For example, the file “price_list.xls”, once crypted by Kaaa, will be titled as “price_list.xls.kaaa”. As soon as the file encryption is accomplished, Kaaa puts its own special text document (_readme.txt) into all the folders that keep the encrypted files.

The alert stated by document asking for the random os very similar to the notices provided by other ransomware risks belonging to the DJVU family. The warning basically shows that the data has been secured and the only option to get access to it is to use a distinct standalone key. Regretfully, this declaration is absolutely true.

The approach to encrypt the files utilized by Kaaa is not completely looked into. However, there is no doubt that each computer owner may be released an unique decryption key, which is definitely distinct. It is incredibly tough to recuperate the information without the suitable key in location.

“Don’t worry, you can return all your files!”, from text file message:

Don't worry, you can return all your files! virus

One more peculiarity of the Kaaa ransomware is that the users are unable to get access to the key. The decrypting key is hosted on a special server under the complete control by the criminals who have launched the Kaaa virus into the internet. In order to get the key and bring back the essential information, the users are informed to contact the frauds through email or by telegram and to pay the ransom in the amount of $980.

The message also says that individuals ought to contact the Kaaa authors within 72 hours upon the minute of the information encryption. The alert suggests that by doing so individuals will acquire a 50% discount, therefore, the ransom quantity falls to $490.

No matter what the quantity of the ransom is, we highly advise that you do not pay the ransom. There is no guarantee that these online scoundrels will keep their guarantees, so they might not care at all what the victims feel about the file encryption, even when the amount of the ransom is received into their accounts. Thus, paying ransom typically does not result in an effective healing. So, the users may simply lose their money for nothing.

Similarly, we urge you not to get in touch with the scams as they advise. Do not transfer loan into their wallets. There are no applications that could split the Kaaa virus or bring back the data at no charge. Therefore, the only right choice is to bring back the information from possible backups (if readily available).

Virus Summary

NameKaaa Ransomware
File Extensionkaaa
Short DescriptionThe ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
SymptomsFile encryption by the ransomware is performed by means of the AES-256 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .kaaa extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsLokas, Besub, Nusar
Kaaa Removal Tool   GridinSoft Anti-Malware
Kaaa Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Internet is now loaded with infections similar to the Kaaa ransomware. For example, this particular danger is basically identical to Brusaf and other ransomware-type infections. These harmful energies have actually been established in order to encrypt the important information and express the need for the users to pay the ransom. All these infections use the identical algorithm to produce the particular key for effective files decryption.

Unless the Kaaa ransomware is still under the advancement procedure or has actually got some hidden bugs, it is not possible to bring back the information by hand. Thus, the only working option to prevent the loss of your essential information is to frequently preserve updated backups of all your crucial documents.

Another important piece of advice is to save the backups on unique storage not linked to your main computer. For example, you might keep it on the USB Flash Drive, or some external hard disk, or by using the cloud data storage services. Keeping the backups on your routine drive is very risky, because the backup may also be secured by the Kaaa .

Leaks for the Kaaa ransomware attack.

Kaaa uses lots of courses to infiltrate the vulnerable computer systems. It is not particular what particular technique was used in your case, nevertheless, the invasion may occur via the following channels:

  • bundling with third-party programs, mainly free software;
  • spam emails from the unidentified senders;
  • websites offering free hosting;
  • P2P (peer-to-peer) torrent software.

There are times when the Kaaa might disguise itself as some real application, for example, through the deceptive informs requiring setup of some software upgrade. This is the most common trick utilized by the scams to inject the Kaaa virus files into the system. In this manner users partly participate in its installation, without plainly comprehending the threat.

In addition, the scams might send out unsolicited spam e-mail with difficult notifies encouraging the people to open suspicious attachments or click on some download links, for example, those motivating individuals to open specific photos, text files, tax files and other information.

No doubt, opening these files or clicking on the malicious links may essentially damage the system. Fake Adobe Flash Player upgrade alerts may cause the Kaaa ransomware infiltration. Similarly, downloading the cracked software may furthermore contain the ransomware installer. The last but not the least, setup of Kaaa may occur through some Trojan horses that might be set up stealthily into the system and without the user’s direct permission or perhaps approval.

Preventing the Kaaa injection.

Of course, there is no outright warranty that your computer system will be constantly free of any malware attacks, nevertheless, we wish to share some useful tips with you to make it much safer. Make certain to pay really attention while searching the web and specifically while downloading cost-free programs. Do not open any suspicious email accessories, particularly if the sender is not known to you.

Do not forget that particular freeware installer may likewise contain some other additional apps in the bundle. These additional applications might be very damaging. It is of utmost significance to keep your anti-virus software and your operating system in general to be constantly correctly upgraded.

It is quite logical that downloading pirated software is unlawful, however, in addition, such unauthorized software use may likewise bring major damage to your system. Hence, do not download any split programs. Plus, the truth that your current anti-virus did not safeguard the system from the Kaaa ransomware is a great factor for you to reconsider your choices and switch to another program that can render the protecting functions on a much better level.

Below please find the quotation from the Kaaa text file:


 Don't worry, you can return all your files!
 All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
 The only method of recovering files is to purchase decrypt tool and unique key for you.
 This software will decrypt all your encrypted files.
 What guarantees you have?
 You can send one of your encrypted file from your PC and we decrypt it for free.
 But we can decrypt only 1 file for free. File must not contain valuable information.
 You can get and look video overview decrypt tool:
 Price of private key and decrypt software is $980.
 Discount 50% available if you contact us first 72 hours, that's price for you is $490.
 Please note that you'll never restore your data without payment.
 Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.

 To get this software you need write on our e-mail:

 Reserve e-mail address to contact us:

 Our Telegram account:

Screenshot of files with “.kaaa” extension added by the virus:”

Kaaa Ransomware - encrypt files with .kaaa extension

Use GridinSoft Anti-Malware to remove Kaaa ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

Use Emsisoft Decryptor for restore kaaa files

You can get Emsisoft Decryptor by clicking the button below:

  Emsisoft Decryptor

  1. Run the decryptor as an administrator. The license terms will show up, which you have to agree to by clicking the “Yes” button.
  2. Once the license terms are accepted, the primary decryptor user interface opens.
  3. By default, the decryptor will pre-populate the locations to decrypt with the currently connected drives and network drives. Additional locations can be added using the Add” button.
  4. Decryptors typically offer various options depending on the particular malware family. The available options are located in the Options tab and can be enabled or disabled there. You can find a detailed list of the available Options below.
  5. After you have added all the locations you want to decrypt to the list, click the “Decrypt” button to start the decryption process. The screen will switch to a status view, informing you about the current process and decryption status of your files
  6. The decryptor will inform you once the decryption process is finished. If you require the report for your personal records, you can save it by clicking the “Save log” button. You can also copy it straight to your clipboard to paste it into emails or forum posts if you are asked to.
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Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

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