How to remove Coos virus and restore encrypted files

Coos is the malicious program that infects the PC mostly through e-mail spam and Trojans. Occasionally scammers use exploits to get into the system, but they are promptly corrected. After penetration, Coos checks the computer memory to find the folders for encryption and their approximate price. Currently, each modern ransomware can encrypt audio, text, image and video information in all popular extensions. Coos corrupts all folders, but the ones that look like business records go first. All software in the system will be safe since fraudsters want only information. Encryption is executed through famous RSA and AES algorithms, and it is so complex that that decipherment of information without a key is impossible. This is the ground for such an incredible success of ransomware in recent years: usual user, even having a fairly high experience in suchlike things, will never restore the files, and will have no way out except paying the ransom. The single method to decrypt the data is to crack the scam website and obtain the master key. Also there's a way to retrieve these keys through faults in viruse's program code.

Coos ransomware virus

The item is about ransomware called Coos that gets onto users' systems in diverse countries of the world, and encrypts the data. In this page you will see complete info about what is Coos, and the removal of Coos from the computer. Besides, we'll tell you how to recover the encrypted files, if possible.

There is one common feature for all types of dangerous programs: it's way easier to avoid it than to cure it. For ransomware it's most relevant, because, unlike normal suspicious programs, when you eliminate ransomware from the computer, the consequences of its actions will stay. It's very easy to decrease the chances to get ransomware by following these rules:

    • Monitor the status of your computer. File encryption is a complex process that needs a large amount of hardware resources. When the Coos starts to operate, the system slows down, and the encrypting process appears in Process Manager. You might anticipate this moment and unplug the computer before data will be fully lost. Surely, the certain amount of data will be damaged, but the rest of them will remain intact.
    • Take notice to the dialog boxes. One of the simplest ways of data restoration is the restoration via Shadow Copies, and hackers have included the deletion of SC in the primary functionality of malware. However deletion of shadow copies requires administrator rights and user's confirmation. Thus, if you don't confirm changes from a unknown program at the proper time, you will save the way to decrypt all corrupted files free of charge.
    • Attentively inspect your emails, especially those messages which have files attached to them. If this message comes from an unknown user and it notifies about winning any prize, a lost package or something similar, this could be ransomware. The second most efficient kind of such letters is a forgery for biz correspondence. It is OK to be interested and click on the letter even if it is obviously not for you, but remember that a single click on the attached file may cost you a lot of efforts, time and money.

You should understand that the deletion of ransomware is only the first and required turn for the standard work of the computer. To decrypt the information you will have to familiarize with the tips in the next part of our entry. To get rid of Coos, you have to launch the workstation in safe mode and scan it through AV-tool. We do not advise trying to uninstall the virus manually, because it has different defensive mechanics that can interfere you. Modern malware can easily remove corrupted information, or part of it, if user tries to delete the virus. This is very undesirable, and the following paragraph will help you to cope with it.

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

If you fulfilled all steps, described in above paragraph - it's time to decypher the data. We won't try to decypher the data, but we'll recover them using OS features and the additional software. Generally, to recover the files, you should ask for help on anti-malware forums or from celebrated ransomware fighters and antiviral program vendors. If you picked the independent data restore - take a look at this article, which shows all the safest manners.

To restore information, follow the article about files decryption.

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