.Iiss Virus


.Iiss is a malicious ransomware-based virus that searches the computer for specify file types and encrypts them all with a complex encryption code. The purpose of .Iiss is to demand a ransom from the owner for the decryption of the encrypted files.


Once the .Iiss virus has encrypted your files it will leave a note in a .txt file.

The ransomware infections are some of the most problematic and hard-to-remove infections that the web users may encounter. They are designed to blackmail the web users either by blocking access to the screen of their computer or by encrypting the files that are stored there for indefinite period of time or until the victim agrees to pay a ransom.

In most cases, there is no 100% sure way of dealing with the consequences of these threats. Even the fact that you may have a very professional and strong antivirus program may not be enough to save you from the infection and the effects of its attack, especially when it comes to new cryptoviruses such as .Iiss, Foop and .Mmpa.

One of the explanations for this is that this kind of malware isn’t meant to destroy the customer or its data, but instead, it is aimed at simply encrypting certain files and rendering them inaccessible. This allows the criminals behind the infection to blackmail the users for a ransom if they want to regain access.

Unfortunately, the encryption of files does not compromise the security of the system and, therefore, many antivirus programs do not mark this as an unsafe or harmful process that should be stopped. This, in turn, contributes to the failure of the security software to identify the ransomware cryptovirus on time.

The .Iiss virus

The .Iiss virus is the new software hazard of the ransomware class which may lock up all the data found on your computer in minutes with the help of a military-grade encryption. Typically, the .Iiss virus does trigger visible symptoms of its presence until the file-encryption is done, which makes it almost impossible to identify.

Few users may experience slowdowns in their computers or general device instability, but this is not always a very significant symptoms. This, of course, allows the malware to have more than ample time to finish the encryption process in the background of the system. After this, the virus then  displays a message from the hackers who stay behind it that the data on the infected computer can no longer be accessed without a special decryption key. In this message, the crooks provide details on how to obtain the key  by making a ransom payment to a specific cryptocurrency wallet.

The .Iiss file decryption

The .Iiss file decryption is a process of file recovery that enables data encrypted by the .Iiss virus to be returned back to is usual state. To complete the .Iiss file decryption process,  the victims need a special key which is available only against a fixed amount of money as a ransom.

.Iiss file

The .Iiss file encryption is complex and impossible to decrypt.

Naturally, some people might think about paying the ransom in order to get their files back, but we have to warn you that this course of action doesn’t guarantee the full recovery of your data. The hackers can easily take all the money and keep the decryption key for themselves or try to blackmail you again. Unfortunately, you won’t be able to do anything but only hope that they will eventually fulfill their promise. If that doesn’t happen, however, you will lose your money in vain and will still need to look for other solutions. That’s why, if you have been infected with .Iiss but don’t have the money for the decryption key or you simply don’t want to pay to some anonymous crooks, you can search for other methods of file-recovery. In the removal guide below you will find a few suggestions and a professional removal tool which can help you remove .Iiss from your system.


Name .Iiss
Type Ransomware
Danger Level High (Ransomware is by far the worst threat you can encounter)
Symptoms Very few and unnoticeable ones before the ransom notification comes up.
Distribution Method From fake ads and fake system requests to spam emails and contagious web pages.
Data Recovery Tool Not Available
Detection Tool

anti-malware offerOFFER *Read more details in the first ad on this page, EULA, Privacy Policy, and full terms for Free Remover.

.Iiss Ransomware Removal


Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).



Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab. Try to determine which processes are dangerous.


Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
This scanner is free and will always remain free for our website's users.
This file is not matched with any known malware in the database. You can either do a full real-time scan of the file or skip it to upload a new file. Doing a full scan with 64 antivirus programs can take up to 3-4 minutes per file.
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Drag and Drop File Here To Scan
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Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
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    After you open their folder, end the processes that are infected, then delete their folders.

    Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections.


    Hold the Start Key and R copy + paste the following and click OK:

    notepad %windir%/system32/Drivers/etc/hosts

    A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

    hosts_opt (1)

    If there are suspicious IPs below “Localhost” – write to us in the comments.

    Type msconfig in the search field and hit enter. A window will pop-up:


    Go in Startup —> Uncheck entries that have “Unknown” as Manufacturer.

    • Please note that ransomware may even include a fake Manufacturer name to its process. Make sure you check out every process here is legitimate.


    Type Regedit in the windows search field and press Enter. Once inside, press CTRL and F together and type the virus’s Name.

    Search for the ransomware in your registries and delete the entries. Be extremely careful – you can damage your system if you delete entries not related to the ransomware.

    Type each of the following in the Windows Search Field:

    1. %AppData%
    2. %LocalAppData%
    3. %ProgramData%
    4. %WinDir%
    5. %Temp%

    Delete everything in Temp. The rest just check out for anything recently added. Remember to leave us a comment if you run into any trouble!


    How to Decrypt .Iiss files

    We have a comprehensive (and daily updated) guide on how to decrypt your files. Check it out here.

    If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!


    About the author


    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

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