How to remove Zida virus and restore encrypted files

This page is dedicated to virus called Zida which penetrates customers' systems around the world, and corrupts their data. In this entry we've assembled full information on Zida's essence, and how to get rid of Zida from the PC. Except that, we will explain how to restore the cyphered files and is it possible.

Zida ransomware virus

Zida ransomware had infected hundreds of machines around the world with help of most effective manner: false e-mails with dangerous attachments. Sometimes web-criminals use exploits to get into the PC, but they are speedily fixed. After penetration, the virus scans the hard disc, defines the quantity of folders for encryption and their general cost. Currently, each new virus can cypher text, audio, video and image files in all popular extensions. Ransomware cyphers all folders, but those that could be business documents go first. Zida targets only files with information, and doesn't touch the programs, so that the victim can use the computer to pay the ransom. Encryption is executed via famous encryption algorithms, and its complexity is so high that it can't be bruteforced. Such complexity gives reason for impressive success of ransomware in recent years: an ordinary customer, even if he has a pretty good knowledge of the PC, will never recover the data, and will have no way out except paying the ransom. The single way to decrypt files is to find the scam website and obtain the master key. Some experienced malware researchers can obtain encryption keys through defects in viruse's program code. .

For any sorts of computer viruses, one statement is correct: it is way simpler to dodge it than to cure it. For ransomware it's very important, because, in contradistinction to normal hazardous programs, when you delete ransomware from the computer, the fruits of its doings will stay. To guard yourself, you should keep in mind a three elementary rules:

    • Heed to the pop-ups. If the system is infected by virus, it will attempt to remove all copies of the data, to make the recovery less possible. However deletion of shadow copies requires admin rights and user's confirmation. Thus, not confirming alterations from a suspicious program at the right moment, you will reserve the chances to restore all lost files free of charge.
    • Do not ignore the signs that your laptop shows. It needs much of computing power to encrypt the information. When the Zida starts to operate, the machine slows down, and the encrypting process appears in Process Manager. You may anticipate this moment and switch off the system before data will be totally lost. These measures, in case of penetration, will guard some of your data.
    • Attentively study your mailbox, particularly the messages that have attached files. The very effective model of scam e-mails is the notification about prize winning or package receiving. The second most common sort of these messages is a "business letters". It is normal to be interested and read the letter even if it's sent to the wrong address, but remember that one click on the viral file may cost you a lot of money, time and efforts.

Zida uninstalling is not the happy end - it's just a first step in the long road before the complete file recovery. If you uninstall ransomware, you will not recover the files immediately, it will take multiple actions written down in the following paragraph. In case of encrypting virus we do not give the by-hand deletion tips, because its complexity and the possibility of mistakes appears to be too high for common customer. Some ransomware can't be uninstalled even through antivirus-program, and have other serious mechanics of security. The most efficient viral defensive technique is the removal of files on the chance of data recovery or ransomware removal attempt. To neutralize this, follow the tips under this paragraph.

Removal instruction

Step 1. Boot into Safe mode

Safe mode

Start -> Msconfig.exe

Safe mode. Step 1

On the tab Boot select Safe boot

Safe mode. Step 2

Step 2. Check Startup folder

Start -> Msconfig.exe ->Disable unknown programs in the Startup tab

Startup

Step 3. Check hosts file

Modify hosts file, that located in C:\Windows\System32\drivers\etc\ .

Hosts file.Step 1

Open the file with Notepad and delete suspicious strings.

Hosts file.Step 2

It has to look like this:

Hosts file.Step 3

Step 4. Scan the system with antiviral scanner

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Step 5. Disable Safe mode

Start -> Msconfig.exe ->Disable Safe boot in the Boot tab

Deactivate Safe mode

After removing the malware from the PC, you should get back the encrypted files. Actually, this is not about decipherment, since the encryption methods owned by web-criminals are very complicated. There are the few chances, but generally file restoration takes lots of time and efforts. If you're really interested in the independent data recovery - take a look at our entry, which describes all the easiest manners.

To restore information, follow the article about files decryption.

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