Iisa Virus – Details
Iisa is a destructive software application functioning as typical ransomware. Michael Gillespie, the popular virus researcher, first discovered this new name in the DJVU ransomware family.
Iisa was developed for the sole function to encrypt all popular file types. Rationally, as soon as the file encryption is successfully achieved, the users are unable to get access to them. Iisa ransomware adds its own “.iisa” to all the encrypted files. For instance, the file “price_list.xls”, when modified by Iisa, will be titled as “price_list.xls.iisa”. As soon as the encryption is achieved, Iisa puts its own unique text file (_readme.txt) into all the folders that store the encrypted files.
The message stated by text file requesting for the random os really comparable to the notifications given by other ransomware dangers belonging to the DJVU family. The warning basically indicates that the data has been encrypted and the only solution to get access to it is to use a special standalone key. Regretfully, this declaration is absolutely real.
The method to secure the files utilized by Iisa is not totally investigated. Nevertheless, there is no doubt that each computer system owner may be provided a special decryption key, which is definitely unique. It is very tough to recuperate the information without the appropriate key in location.
“Don’t worry, you can return all your files!”, from text file message:
One more peculiarity of the Iisa virus is that the users are not able to get access to the key. The decrypting key is hosted on a special server under the total control by the crooks who have actually introduced the Iisa ransomware into the world wide web. In order to obtain the key and restore the important data, the users are told to connect with the scams through e-mail or by telegram and to pay the ransom in the quantity of $980.
The message likewise states that the people need to get in touch with the Iisa authors within 72 hours upon the moment of the information encryption. The alert shows that by doing so individuals will acquire a 50% discount, for that reason, the ransom quantity drops down to $490.
Iisa encrypted your data, however, it may not be the only threat on your PC. Plus, the ransomware may be hidden deep in the system. To discover and erase the hazard completely, we suggest you to describe the help of GridinSoft Anti-Malware tool.
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No matter what the quantity of the ransom is, we highly advise that you do not pay the ransom. There is no assurance that these online scoundrels will keep their promises, so they might not care at all what the victims feel about the encryption, even when the quantity of the ransom is gotten into their accounts. Thus, paying ransom typically does not result in an effective healing. So, the users may just lose their money for absolutely nothing.
Similarly, we urge you not to call the frauds as they instruct. Do not move money into their wallets. There are no applications that could crack the Iisa ransomware or restore the data for free. For that reason, the only right decision is to restore the information from possible backups (if available).
Virus Summary
| Name | Iisa Ransomware |
| File Extension | iisa |
| 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 .iisa extension to all the files modified by it. |
| Distribution Method | Adware bundles and software cracks |
| Similar Infections | Lokas, Besub, Nusar |
| Iisa Removal Tool | GridinSoft Anti-Malware |
| Iisa Decryption Tool | Emsisoft Djvu Decryptor |
Do not forget that the Web is now filled with infections comparable to the Iisa virus. For example, this specific risk is essentially identical to Brusaf and other ransomware-type infections. These destructive energies have actually been established in order to secure the crucial information and reveal the need for the users to pay the ransom. All these infections use the similar algorithm to generate the particular key for successful data decryption.
Unless the Iisa ransomware is still under the development process or has actually got some concealed bugs, it is not possible to bring back the information by hand. Hence, the only working solution to prevent the loss of your crucial data is to routinely keep current backups of all your essential documents.
Another important piece of recommendations is to store the backups on special storage not linked to your primary device. For instance, you may 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 regular drive is very dangerous, considering that the backup might likewise be secured by the Iisa virus.
Leaks for the Iisa ransomware attack.
Iisa uses numerous courses to penetrate the susceptible computers. It is not particular what specific method was used in your case, nevertheless, the intrusion might occur via the following channels:
- bundling with third-party programs, generally free apps;
- spam emails from the unknown senders;
- sites offering free hosting;
- P2P (peer-to-peer) torrent downloads.
There are times when the Iisa may camouflage itself as some real application, for example, through the deceptive notifies requiring setup of some software application update. This is the most common technique utilized by the frauds to inject the Iisa virus files into the system. By doing this users partially take part in its setup, without clearly understanding the danger.
Additionally, the scams might send out unsolicited spam e-mail with challenging notifies encouraging the people to open suspicious attachments or click some download links, for example, those motivating the people to open particular photos, text files, tax files and other information.
No doubt, opening these files or clicking on the destructive links may basically harm the system. Fake Adobe Flash Player update notices may result in the Iisa ransomware infiltration. Similarly, downloading the broken software application may furthermore contain the ransomware installer. The last however not the least, installation of Iisa may take place through some Trojan horses that might be set up stealthily into the system and without the user’s direct consent or even approval.
Avoiding the Iisa ransomware injection.
Of course, there is no absolute assurance that your computer system will be constantly free of any malware attacks, however, we wish to share some helpful ideas with you to make it safer. Make sure to pay really close attention while searching the web and especially while getting cost-free programs. Do not open any suspicious email accessories, particularly if the sender is not known to you.
Do not forget that certain freeware installer might also include some other extra apps in the bundle. These extra applications might be very destructive. It is of utmost importance to keep your anti-virus software application and your operating system in basic to be constantly properly updated.
It is rather logical that downloading cracked programs is illegal, nevertheless, furthermore, such unauthorized programs use might also bring serious damage to your PC. Hence, do not download any cracked programs. Plus, the truth that your present anti-virus did not protect the system from the Iisa ransomware is a good factor for you to reevaluate your options and change to another program that can render the securing functions on a better level.
Below please find the quotation from the Iisa 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 “.iisa” extension added by the virus:”
Use GridinSoft Anti-Malware to remove Iisa ransomware from your computer
1.Download GridinSoft Anti-Malware.
You can download 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 iisa 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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