What is Iisa Ransomware
Iisa Ransomware (also known as STOP Ransomware) is ruinous virus, whose operating principle is based on strong file encryption and money extortion. There have been more, than 350 versions of this malware, with several major modifications and numerous minor changes. Recent ones use random 4-letter extensions added to affected files, to indicate that they are encrypted. Since the very beginning, Iisa Ransomware has used the AES-256 (CFB mode) encryption algorithm. Depending on the exact extension there are slightly different, but similar removal and decryption methods. Variation under research today uses .iisa extensions. Like its predecessors, it creates a ransom note called _readme.txt, below is an example of such a text file.
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:
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:
Your personal ID:
Iisa Ransomware uses system directories to store its own files. In order to start automatically each time the OS starts, the encryptor creates an entry in the Windows registry section that defines the list of programs that start when the computer is turned on or restarted. Therefore, to be able to decrypt your files you need to remove the virus first. The technical peculiarity of this malware allows users to decrypt files successfully in some cases. The matter is Iisa Ransomware tries to connect its server every time it starts encryption on a victim’s computer. In case of a successful connection, each victim is assigned a unique key and that is impossible to retrieve. However, sometimes malfunction occurs, and the virus process either cannot connect to its command server or the victim’s computer disconnects to the Internet. In this case, ransomware uses a typical hard-coded encryption key, that can be gathered with the help of a special decryption tool, for example, one from Emsisoft. There are also auxiliary instruments, that may help you to recover files encrypted by STOP (DJVU). Stellar Data Recovery Professional is one of the best file-recovery tools and, if used properly, may recover copies and duplicates of encrypted files, that were removed prior to infection. The only option for a successful 100% recovery is using existing backups. Follow the tutorial to remove Iisa Ransomware and decrypt .iisa files, that we prepared meticulously for your convenience.
- Download Iisa Ransomware Removal Tool
- Get decryption tool for .iisa files
- Recover encrypted files with Stellar Data Recovery Professional
- Restore encrypted files with Windows Previous Versions
- Restore files with Shadow Explorer
- How to protect from threats like Iisa Ransomware
Virus modifies “hosts” file to block Windows updates, downloading antivirus programs, and visiting sites related to security news or offering security solutions. Iisa Ransomware comes along with AZORult trojan, which was initially created to steal logins and passwords. The process of infection also looks like installing Windows updates, the malware shows a fake window, that mimics the update process.
It uses rdpclip.exe to replace a legal Windows file and to launch an attack on a computer network. After encrypting the files, the encrypter is deleted using the delself.bat command file. Iisa Ransomware virus is propagated via spam attack with malicious e-mail attachments and using manual PC hacking. Can be distributed by hacking through an unprotected RDP configuration, fraudulent downloads, exploits, web injections, fake updates, repackaged, and infected installers. The virus assigns a certain ID with the victims, which is used to name those files and supposedly to send a decryption key. Great tools to protect against Iisa Ransomware are: Emsisoft Anti-Malware and Malwarebytes Anti-Malware.
Download Iisa Ransomware Removal Tool
To remove Iisa Ransomware completely, we recommend you to use SpyHunter 5 from EnigmaSoft Limited. It detects and removes all files, folders, and registry keys of Iisa Ransomware. The trial version of SpyHunter 5 offers virus scan and 1-time removal for FREE.
Alternative Removal Tool
To remove Iisa Ransomware completely, we recommend you to use WiperSoft AntiSpyware from WiperSoft. It detects and removes all files, folders, and registry keys of Iisa Ransomware and prevents future infections by similar viruses.
How to remove Iisa Ransomware manually
It is not recommended to remove Iisa Ransomware manually, for safer solution use Removal Tools instead.
Iisa Ransomware files:
Iisa Ransomware registry keys:
How to decrypt and restore .iisa files
Use automated decryptors
Download STOP Djvu Decryptor from EmsiSoft (.iisa variations)
IMPORTANT: Read this detailed guide on using STOP Djvu Decryptor to avoid file corruption and time wasting.
STOP Djvu Decryptor is able to decrypt .iisa files, encrypted by Iisa Ransomware. This tool was developed by EmsiSoft. It works in automatic mode, but in most cases works only for files encrypted with offline keys. Download it here:
Dr.Web Rescue Pack
Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .iisa files by uploading samples to Dr. Web Ransomware Decryption Service. Analysis of files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.
If you are infected with Iisa Ransomware and removed it from your computer, you can try decrypting your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:
Use Stellar Data Recovery Professional to restore .iisa files
- Download Stellar Data Recovery Professional.
- Click Recover Data button.
- Select type of files you want to restore and click Next button.
- Choose location where you would like to restore files from and click Scan button.
- Preview found files, choose ones you will restore and click Recover.
Using Windows Previous Versions option:
- Right-click on infected file and choose Properties.
- Select Previous Versions tab.
- Choose particular version of the file and click Copy.
- To restore the selected file and replace the existing one, click on the Restore button.
- In case there is no items in the list choose alternative method.
Using Shadow Explorer:
- Download Shadow Explorer program.
- Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
- Select the drive and date that you want to restore from.
- Right-click on a folder name and select Export.
- In case there are no other dates in the list, choose alternative method.
If you are using Dropbox:
- Login to the DropBox website and go to the folder that contains encrypted files.
- Right-click on the encrypted file and select Previous Versions.
- Select the version of the file you wish to restore and click on the Restore button.
How to protect computer from viruses, like Iisa Ransomware, in future
1. Get special anti-ransomware software
Use ZoneAlarm Anti-Ransomware
Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.
2. Back up your files
As an additional way to save your files, we recommend online backup. Local storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. Iisa Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.
3. Do not open spam e-mails and protect your mailbox
Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.