Step By Step Guidelines To Remove cosacos ransomware From Windows

Discovered as another new variant of STOP ransomware, cosacos ransomware is a new cryptovirus that is prone of encrypting files on targeted computers and setting a new extension as suffix .Cosacos. Means, the malware will take hostage of almost all your important files saved on computer and enforce you to pay demanded ransom amount in Bitcoin, else all your file access will be permanently lost. Although, the ransomware like objects are considered as the most robust malware kinds, remitting any payment to criminals is not yet the ideal solution and the victims should treat the threat as soon as possible with the guidelines included here.

Threat Specification

Name: cosacos ransomware

Type: Ransomware, cryptovirus

Description: Being a ransomware, cosacos ransomware locks down all your essential files and ask you to pay demanded ransom money, else your file access will not be recovered.

Distribution: Spam/junk email attachments, freeware or shareware installers, malicious file downlaods, and so on

Removal: We highly recommend you to choose automatic solutions

Details how cosacos ransomware assails and do on targeted system

Speaking about the intrusion, cosacos ransomware mostly assails inside targeted computers through vicious online downloads. The creators actually distribute this malware source code over web and even circulate the same through links or ads. Further, phishing email attack campaigns can also be practiced under which a user receives an email with attached file. The file is actually linked or associated with the ransomware, so executing the same on computer initiates ransomware processes instantly which turns the PC access terrible. This is why, the detection of cosacos ransomware’s intrusion on a computer can hardly be identified in real time and so why the risk level increases in a very mean time.

Coming about its doings, once the malware manage itself to be activated on targeted computers, cosacos ransomware instantly scans the whole system to collect details of files stored on computer and encrypt them using hybrid encryption algorithms including AES and RSA ciphers. This means, the locked files can be accessed only after supplying a valid decryption key, but these keys are further stored on remote server controlled by hackers. Taking benefit of this condition, the criminals use to scare users with ransom note or its content which simply states that paying ransom amount is mandatory, else the affected files will be deleted as well after a mentioned span of time. Here comes the message as shown by ransom note deployed by cosacos ransomware:


Don’t worry my friend, you can return all your files!

All your files like photos, 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” folder if you don’t get answer more than 6 hours.

To get this software you need write on our e-mail: [email protected]

Reserve e-mail address to contact us: [email protected] Your personal ID:

If you are infected by cosacos ransomware and being forced frequently to pay off ransom money, then you should simply avoid doing so. it’s better for you to follow the methods prescribed here to free up your machine against cosacos ransomware and restore your files using some alternative solutions.

What’s suggested to remove cosacos ransomware?

Since you are infected with cosacos ransomware, really the situation is panicking but this would never help you at all and you should follow some recommended methods as soon as possible so as more and more hectic problems can be resolved. In order to remove cosacos ransomware from an infected computers, we highly suggest to choose a powerful antimalware solution as included here. The software will use smart and powerful steps to remove cosacos ransomware automatically along with all suspicious files and processes. Once the removal task is processed, the victims can try restoring their files either using a lately created backup file or through a recommended data recovery software.


Steps To Remove cosacos ransomware From Compromised Computer

The infections like cosacos ransomware or similar ones or those belong to other malware category are all designed to generate with only ill intention to make money for its developers who make use of any technique to force you down. However, most of the security experts associated with different security associations say this is not much harmful browser and can be removed from an infected computer by getting through some steps. If you follow the steps in the same order and with full attention as described in the procedures below, we hope you can also free up your PC easily. It’s recommended to take a hard copy of the guidelines on paper or get another computer to assist you following the steps without any hassles.

Step 1:Track and remove cosacos ransomware from computer’s processes from task manager.

Step 2:Locate and delete the definition of this program from startup files, registry files, and host files.

Step 3:Removal of cosacos ransomware from all reputed browsers.

Step 4:Delete cosacos ransomware with an automatic solution(The Safest and most recommended method)

Step 1: Track and remove cosacos ransomware from computer’s processes from task manager.

  • Launch the Task Manager by pressing a key combination CTRL+SHIFT+ESC simultaneously.

  • Review the suspicious processes and note down its file location on computer.end-malicious-process

  • Terminate the processes now.

  • Open the “Run” command box and enter the noted down location to open in file explorer.

  • Delete the file permanently.

Step 2: Locate and delete the definition of this program from startup files, registry files, and host files

  • Launch the file explorer or any folder from my computer.

  • Click on “View” option in the above Menu (Older Windows version’s user may go to control panel to open “Folder options”)

  • Choose “Folder and Search Options”

  • Click over “View” tab.

  • Scroll down to find “Show hidden files and folders” option, and check it in the check box.

  • Find “Hide protected operating system files” and uncheck it. (This will allow you to see super-hidden files in any folder to identify the suspicious ones.)

  • Click “Apply” then “Ok”

Cleaning cosacos ransomware definitions from Windows registry

  • To open Windows registry editor, click Win+R combination.

  • Type “regedit” ro simply copy and paste in the command line

  • Press Ok.

  • Navigate to below mentioned registry files depending on your OS versions (32 bit or 64 bit) and delete the files.

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run] or

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] or


  • Now Launch the Windows explorer and navigate to %appdata% to find and delete suspicios executable files from there, and close the window.

Fixing Hosts file to block the unwanted redirections on all active browsers

  • Open windows explorer and navigate to Windows directory.

  • Go to System32/drivers/etc/host

  • open the host file and notice it. If the system is hijacked by the infection you would see several IP definitions at the bottom.

  • Select those IP addresses and delete them. (Don’t delete the local host entry)

  • Save and close the file, and exit the explorer window.

Step 3: Removal of cosacos ransomware from all reputed browsers (Steps included for Chrome, Firefox & Internet Explorer)

Google Chrome

  • Launch Chrome browser.

  • Click over the main menu icon and select Tools or More Tools, then Extensions.

  • Scroll down to notice the list of installed extensions to find suspicious one and click the bin option beside it.

  • Click remove button to confirm the deletion.

  • Finally, Reset the Chrome settings to default leaving nothing behind.

Mozilla Firefox

  • Launch the Firefox and press CTRL+SHIFT+A to open extension Window.

  • Look for the cosacos ransomware extension and Disable it.

  • Now go to Help section.

  • Click over Troubleshooting information then hit the Reset button.

  • Confirm the act to reset the browser.

Internet Explorer

  • Simply, open the browser and click thee Gear Icon on the upper right corner.

  • Navigate to Internet options and click it.

  • Now, navigate to Toolbars and Extensions, to see the list of installed addons to find unwanted one.

  • Disable or delete the selected extensions permanently.

  • In order to reset the Ie, click over Advanced tab, and click Reset.

  • Press OK button to confirm.

Cleaning the browser’s shortcuts on the computer is also recommended in most of the cases and should be accomplished for all installed browsers, for which the steps are:

  • Select the browser short-cut, and right click on it.

  • Navigate the properties and click it.

  • In the opened window, find the target option, and remove the argument for cosacos ransomware .

  • Apply the changes.

Step 4: Remove cosacos ransomware with an automatic solution

Although the removal method through manual instructions are effective and proven to provide the best results, still some of the victimized users may fail to get the results as per their desire. This can happen due to lack of technical consent to access most of the administrative utilities as used in above guidelines. If you also got stuck through the instructions or seeking the safest method which needs not any high end manual steps, then opting an automatic solution could be the best solution. You just need to do a few instructions taken in practice to install and scan the system deeply that will fix all issues and remove cosacos ransomware completely. The required steps to do so is all here mentioned.


Easily remove all online trending threats from your PC safely at just single click.

Step 1:Download and install cosacos ransomware removal tool and install it on your computer (Note:this is a free scanner that will detect the present malwares on your system only. In order to fix the threats completely, you would have to buy its full version to remove the threats.)

Step 1

Step 2: After the installation is finished, run the scanner and you will see the two options as depicted in the image below. Click on “Scan Computer Now” button.

Step 2

Step 3: In this step, you would see the scanning process bar with detection of found threats and its short description along-with its categorized thumbnail.

Step 3

Step 4: Lastly, the scanner finishes scanning the computer to show full list of detected threats on computer. Just click on “Fix Threats” button to complete the removal that hardly takes a few moments depending upon the nature and severity level of the malware items.

Step 4