Iiss Virus Removal Guide (+Decrypt .iiss files)

Iiss Virus Ransomware

Iiss is a destructive software working as common ransomware. Michael Gillespie, the well-known malware researcher, very first found this new name in the DJVU ransomware family.

Iiss was created for the sole function to encrypt all popular file types. Rationally, as quickly as the file encryption is effectively achieved, the users are not able to get access to them. Iiss ransomware adds its own “.iiss” to all the encrypted data. For instance, the file “price_list.xls”, once crypted by Iiss, will be entitled as “price_list.xls.iiss”. Once the encryption is achieved, Iiss puts its own distinct text document (_readme.txt) into all the folders that keep the encrypted files.

The alert specified by text file requesting for the random os very comparable to the notices provided by other ransomware threats belonging to the DJVU family. The caution essentially shows that the files have been encrypted and the only solution to get access to it is to use a special standalone key. Regretfully, this statement is definitely true.

The method to encrypt the files used by Iiss is not completely looked into. Nevertheless, there is no doubt that each computer owner may be provided an unique decryption key, which is definitely distinct. It is exceptionally difficult to recuperate the information without the proper type in place.

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

message from Iiss virus

One more peculiarity of the Iiss virus is that the users are not able to get access to the key. The decrypting key is hosted on an unique server under the total control by the scoundrels who have actually released the Iiss virus into the internet. In order to obtain the key and restore the important data, the users are informed to contact the scams via e-mail or by telegram and to pay the ransom in the amount of $980.

The message likewise states that individuals must get in touch with the Iiss authors within 72 hours upon the minute of the information encryption. The alert shows that by doing so individuals will get a 50% discount rate, therefore, the ransom amount drops down to $490.

No matter what the amount of the ransom is, we strongly advise that you do not pay the ransom. There is no warranty that these online crooks will keep their guarantees, 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. Hence, paying ransom often does not lead to a successful healing. So, the users may merely lose their money for nothing.

Likewise, we prompt you not to get in touch with the frauds as they advise. Do not transfer loan into their wallets. There are no applications that could split the Iiss virus or restore the information at no charge. Therefore, the only correct choice is to bring back the information from possible backups (if available).

Virus Summary

NameIiss Ransomware
File Extensioniiss
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 .iiss extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsEfji, Mmpa, Foqe
Iiss Removal Tool   GridinSoft Anti-Malware
Iiss Decryption Tool   Emsisoft Djvu Decryptor

Do not forget that the Web is now full of infections similar to the Iiss ransomware. For example, this particular danger is generally identical to Brusaf and other ransomware-type infections. These damaging energies have been established in order to secure the crucial data and express the need for the users to pay the ransom. All these infections use the identical algorithm to create the specific key for successful information decryption.

Unless the Iiss ransomware is still under the development procedure or has got some concealed bugs, it is not possible to bring back the information manually. Hence, the only working option to prevent the loss of your important information is to regularly keep updated backups of all your important data.

Another important piece of advice is to save the backups on special storage not connected to your primary computer. For example, you might save 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 really risky, because the backup may likewise be secured by the Iiss .

Leaks for the Iiss ransomware attack.

Iiss utilizes numerous courses to penetrate the susceptible computers. It is not particular what particular method was used in your case, nevertheless, the invasion might take place via the following channels:

  • bundling with third-party programs, mainly free apps;
  • spam emails from the unknown senders;
  • websites providing complimentary hosting;
  • P2P (peer-to-peer) torrent downloads.

There are times when the Iiss might camouflage itself as some authentic application, for instance, through the misleading signals demanding installation of some software application upgrade. This is the most common trick utilized by the frauds to inject the Iiss virus files into the system. By doing this users partly take part in its setup, without clearly understanding the threat.

Moreover, the frauds might send out unsolicited spam e-mail with challenging informs encouraging the people to open suspicious attachments or click on some download links, for example, those encouraging the people to open particular pictures, text files, tax files and other information.

No doubt, opening these files or clicking on the destructive links may basically harm the system. Fake Acrobat Reader update alerts may result in the Iiss ransomware seepage. Likewise, downloading the split software might furthermore contain the ransomware installer. The last however not the least, setup of Iiss might take place through some Trojan horses that may be installed stealthily into the system and without the user’s direct permission or perhaps authorization.

Preventing the Iiss ransom virus injection.

Obviously, there is no outright assurance that your computer system will be constantly devoid of any malware attacks, however, we want to share some useful pointers with you to make it much safer. Make certain to pay extremely very close attention while browsing the web and especially while downloading cost-free programs. Do not open any dubious email attachments, specifically if the sender is not known to you.

Do not forget that specific freeware installer may likewise consist of some other additional apps in the package. These extra applications may be extremely harmful. It is of utmost value to keep your anti-virus software and your os in basic to be constantly correctly upgraded.

It is rather rational that downloading pirated apps is illegal, however, furthermore, such unauthorized apps use might likewise bring serious damage to your system. Thus, do not download any cracked programs. Plus, the truth that your existing anti-virus did not protect the system from the Iiss ransomware is an excellent factor for you to reconsider your choices and change to another program that can render the securing functions on a far better level.

Below please find the quotation from the Iiss 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 “.iiss” extension added by the virus:”

Iiss Ransomware - encrypt files with .iiss extension

Use GridinSoft Anti-Malware to remove Iiss 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 iiss 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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About 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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