IIOF Ransomware. How to decrypt .iiof files?

If you cannot open your images, documents, or files and see the .iiof extension on them, your PC is definitely infected with Iiof ransomware. It pertains to STOP/Djvu ransomware family

Iiof ransomware ciphers personal files identified on the victim’s computer with the extension “.iiof” and then creates the ransom note in each folder which contains encrypted files. The instructions are placed on the victim’s desktop in the “readme.txt” file. Its task is generally similar to other samples of the same family: Xgpr, Dike, Sdjm.

What is Iiof Ransomware?

NameIiof Virus
Ransomware family1DJVU/STOP2 ransomware
Extension.iiof
Ransomware note_readme.txt
RansomFrom $490 to $980
Contactmanager@mailtemp.ch, helprestoremanager@airmail.cc
SymptomsThe images, videos, and other documents have the “.iiof” extension and cannot be opened by any programs
Fix Tool Trojan Killer – ransomware infections tool. 14-day free trial.

Iiof is file-encrypting ransomware that prevents access to your text files, Excel tables, videos and photos by encrypting them. It marks the ciphered files with the “.iiof” extension. Then Iiof ransomware adds a ransom note (readme.txt) to each folder. In it, you can see the instructions to pay the ransom ($490-$980 in Bitcoin) to a specified Bitcoin wallet. The AES-256 or RSA-1028 cipher it uses to encrypt the files is not decryptable with modern computers. Even quantum computers that already exist will likely spend hundreds of years to brute force the decryption key.

How dangerous is the Iiof ransomware?

When Iiof ransomware gets on your computer, it will check your disks for photos, videos, and important documents. It [ciphers all widespread file formats- .psd, .doc, .docx, .xls, .xlsx, .pdf, .jpeg, .png, et cetera. When these files are found, the ransomware will encrypt them and also change their extension to “.iiof” to ensure that you understand what happened.

After the Iiof ransomware encrypted the data on your computer, it will generate the last “readme.txt” file on the desktop. In addition to the ransom payment instructions, the victims also see the emails to contact the cybercriminals – helprestoremanager@airmail.cc and manager@mailtemp.ch.

Here is the ransom note that the Iiof ransomware shows to its victims:

ATTENTION!

Don't worry, you can return all your files!
All your files like pictures, 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-fhnNOAYC8Z
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:
manager@mailtemp.ch

Reserve e-mail address to contact us:
helprestoremanager@airmail.cc

How did the Iiof ransomware get on my computer?

The Iiof ransomware spreads by posting links to download hacked programs or games. Cybercriminals that distribute this ransomware are pretty clever, and try to stay connected with modern things. New games introductions, new popular movies – Iiof developers make whatever to get their money on that. Some of the most popular methods these criminals apply is one-day sites with torrent downloading links. However, following the current news is not the single way these crooks utilize. Options that have already turned into classic, such as e-mail spamming, are likewise common for STOP/Djvu ransomware spreading.

Malicious email spam
The example of email spamming that may lead to Iiof ransomware injection

Preventing this ransomware does not require a lot of initiative. Considering the ordinary rules of PC hygiene will noticeably decrease all hazards. Keep in mind that opening all documents you get on e-mail is not a great tactic. Even worse case is to enable macros in Microsoft Office files. But it is much better to stop the malware attack at the moment when you have only opened the e-mail message. Examining the sender’s address can say a lot about what you can anticipate, as well as when you see things like “support@amazon.com”– it is likely a trustworthy e-mail. At the same time, stuff that tries to resemble Amazon or FedEx shipment alert, but uses the e-mail address of “amazonspurrot1363@gmail.com”– need to make you get on the alarm. Above, you can see the example of such a message.

Illegal sources of various digital things require some extra explanation. Breaking copyright law already throws you to the risk of being fined. However, using torrent trackers or third-party sites to download “free” programs likewise exposes you to various malware. Nobody can regulate unidentified individuals that start the torrent seeding or release the hacked program version on the website with pirated program.

Iiof virus removal instructions.

Download Trojan Killer Portable

Trojan Killer Portable Download

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This guide below shows how to use Trojan Killer Portable3 for Iiof virus detection and removal:

  • STEP 1. Download and install Trojan Killer.

  • STEP 2. Click on "Finish".

  • STEP 3. Wait until necessary updates are downloaded and installed.

  • STEP 4. Select computer scan type.

  • STEP 5. The software will begin scanning your computer.

  • STEP 6. Click on "Cure PC".

Restore the files encrypted by the Iiof ransomware

In most cases, it’s impossible to recover the files encrypted by the Iiof ransomware because the private key needed to unlock the encrypted files is only available through cybercriminals. However, we’ve listed one option you can use to recover your files below.

Warning! Make sure you remove the ransomware from your system first, otherwise, it will repeatedly encrypt your files.

If your files were encrypted with an offline key, there is a chance you can recover them by using Emsisoft Decryptor for the STOP/Djvu decryption tool. Follow the below guide to recover your files using the Emsisoft Decryptor for STOP/Djvu.

  1. You can download Emsisoft Decryptor for STOP Djvu by clicking this link.
  2. When the decryptor has finished downloading, double-click on “decrypt_STOPDjvu.exe” to run this program on your computer.
  3. Click the “Decrypt” button to start the decryption process for Iiof files. The screen will switch to a status view, informing you about your files’ current process and decryption status.
  4. The decryptor will inform you once the decryption process will be finished. If you require the report for your records, you can save it by clicking the “Save log” button.

If the Emsisoft Decryptor can’t decrypt your .iiof files and you do not plan on paying the ransom, it is advised that you make an image of the encrypted drives so that you can decrypt them in the future.

Your computer should now be free of the Iiof ransomware infection. However, suppose your current antivirus allowed this malicious program on your computer. In that case, you might want to consider purchasing the full-featured version of Trojan Killer to protect against these types of threats in the future.

IIOF Ransomware — How To Remove Virus & Decrypt Files?

Name: IIOF Virus

Description: IIOF Virus is a STOP/DJVU family of ransomware-type virus. It encrypts files, video, photos, documents. Encrypted files can be tracked by a specific iiof extension. IIOF ransomware asks victims for a ransom fee about $490 - $980 in Bitcoin.

Offer price: 480

Currency: $

Operating System: Windows

Application Category: Virus

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  1. My files are encrypted by ransomware, what should I do now?
  2. About DJVU (STOP) Ransomware: https://gridinsoft.com/ransomware/djvu
  3. More about Trojan Killer: https://gridinsoft.com/trojankiller

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About William Reddy

I am from Ireland. My parents bought me a computer when I was 11, and several months after I have got a virus on this PC. I decided to enter the INSA Centre Val de Loire university after being graduated from the school. This French educational institution was offering a brand-new cybersecurity course. After getting the master's degree in cybersecurity, I've started working as a virus analyst in a little anti-malware vendor.