Kruu – General Info
Kruu is a malicious software working as typical ransomware. Michael Gillespie, the well-known virus researcher, very first discovered this new name in the DJVU ransomware family.
Kruu 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. Kruu virus adds its own “.kruu” to all the encrypted files. For example, the file “price_list.xls”, once crypted by Kruu, will be entitled as “price_list.xls.kruu”. As soon as the file encryption is achieved, Kruu puts its own unique text file (_readme.txt) into all the folders that save the encrypted files.
The message specified by _readme.txt requesting the random os very similar to the alerts offered by other ransomware dangers belonging to the DJVU family. The warning essentially shows that the files have been secured and the only service to get access to it is to use a distinct standalone key. Regretfully, this statement is absolutely real.
The approach to encrypt the files utilized by Kruu is not completely researched. Nevertheless, there is no doubt that each computer system owner might be provided a special decryption key, which is absolutely unique. It is extremely difficult to recuperate the data without the suitable key in place.
“Don’t worry, you can return all your files!”, from text file message:
One more peculiarity of the Kruu virus 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 Kruu infection into the internet. In order to acquire the key and bring back the essential information, the users are told to connect with the frauds through email or by telegram and to pay the ransom in the quantity of $980.
The message also states that individuals must call the Kruu authors within 72 hours upon the moment of the information file encryption. The alert indicates that by doing so the people will get a 50% discount rate, for that reason, the ransom amount drops down to $490.
Kruu crypted your information, nevertheless, it may not be the only threat on your computer. Plus, the ransomware might be hidden deep in the system. To discover and delete the danger completely, we advise you to refer to the aid of GridinSoft Anti-Malware app.
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No matter what the quantity of the ransom is, we strongly recommend that you do not pay the ransom. There is no warranty that these online criminals will keep their promises, so they may not care at all what the victims feel about the file encryption, even when the amount of the ransom is gotten into their accounts. For this reason, paying ransom frequently does not lead to a successful healing. So, the users might just lose their money for absolutely nothing.
Similarly, we advise you not to call the frauds as they instruct. Do not move loan into their wallets. There are no applications that could split the Kruu ransomware or restore the data at no charge. Therefore, the only appropriate choice is to bring back the data from possible backups (if offered).
Virus Summary
| Name | Kruu Ransomware |
| File Extension | kruu |
| Type | Ransomware |
| Family | DJVU |
| Short Description | The 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. |
| Symptoms | File 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 .kruu extension to all the files modified by it. |
| Distribution Method | Adware bundles and software cracks |
| Similar Infections | Lokas, Besub, Nusar |
| Kruu Removal Tool | GridinSoft Anti-Malware |
| Kruu Decryption Tool | Emsisoft Djvu Decryptor |
Do not forget that the Web is now full of infections similar to the Kruu virus. For instance, this particular hazard is essentially identical to Brusaf and other ransomware-type infections. These damaging energies have actually been established in order to encrypt the crucial data and reveal the need for the users to pay the ransom. All these infections utilize the identical algorithm to produce the particular key for effective data decryption.
Unless the Kruu ransomware is still under the development process or has actually got some hidden bugs, it is not possible to bring back the information manually. Hence, the only working option to avoid the loss of your essential information is to regularly preserve up-to-date backups of all your vital data.
Another essential piece of recommendations is to keep the backups on special storage not linked to your primary PC. For instance, you might store it on the USB Flash Drive, or some external hard disk, or by using the cloud data storage services. Keeping the backups on your system drive is extremely dangerous, given that the backup may also be encrypted by the Kruu ransomware.
Leakages for the Kruu ransomware attack.
Kruu utilizes many courses to penetrate the vulnerable computer systems. It is not certain what specific technique was utilized in your case, nevertheless, the invasion might take place by means of the following channels:
- bundling with third-party programs, generally free apps;
- spam emails from the unknown senders;
- sites supplying free hosting;
- P2P (peer-to-peer) torrent software.
There are times when the Kruu virus may camouflage itself as some authentic application, for example, through the misleading informs requiring setup of some software upgrade. This is the most common trick utilized by the scams to inject the Kruu infection files into the system. In this manner users partially take part in its setup, without plainly understanding the risk.
Additionally, the frauds may send out unsolicited spam e-mail with difficult notifies motivating the people to open dubious attachments or click some download links, for instance, those encouraging individuals to open specific photos, text files, tax files and other info.
No doubt, opening these files or clicking on the destructive links may basically damage the system. Fake Acrobat Reader update notices may lead to the Kruu ransomware infiltration. Similarly, downloading the cracked software might additionally contain the ransomware installer. The last however not the least, setup of Kruu may happen through some Trojan horses that may be set up stealthily into the system and without the user’s direct approval or even permission.
Avoiding the Kruu injection.
Of course, there is no outright warranty that your computer system will be always devoid of any malware attacks, however, we want to share some useful ideas with you to make it safer. Make certain to pay really attention while browsing the web and particularly while getting cost-free programs. Do not open any suspicious email attachments, specifically if the sender is not understood to you.
Do not forget that particular freeware installer might likewise include some other additional apps in the package. These additional applications may be very harmful. It is of utmost importance to keep your anti-virus software and your os in basic to be always properly upgraded.
It is rather logical that downloading cracked apps is illegal, nevertheless, additionally, such unauthorized apps usage might also bring serious damage to your system. Hence, do not download any broken programs. Plus, the truth that your current anti-virus did not safeguard the system from the Kruu ransomware is a great reason for you to reconsider your choices and change to another program that can render the safeguarding functions on a better level.
Below please find the quotation from the Kruu text file:
ATTENTION! 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: https://we.tl/t-2P5WrE5b9f 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: restorealldata@firemail.cc Reserve e-mail address to contact us: gorentos@bitmessage.ch Our Telegram account: @datarestore
Screenshot of files with “.kruu” extension added by the virus:”
Use GridinSoft Anti-Malware to remove Kruu ransomware from your computer
1.Download GridinSoft Anti-Malware.
You can get GridinSoft Anti-Malware by clicking the button below:
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.
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.
3. Press Install button for run GridinSoft Anti-Malware.
3.Once installed, GridinSoft Anti-Malware will automatically run.
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.
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.
Use Emsisoft Decryptor for restore kruu files
You can download Emsisoft Decryptor by clicking the button below:
- Run the decryptor as an administrator. The license terms will show up, which you have to agree to by clicking the “Yes” button.
- Once the license terms are accepted, the primary decryptor user interface opens.
- 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.
- 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.
- 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
- 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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