Cosw Ransomware Removal + Restore .cosw Files

This article intends to help you delete Cosw Ransomware for free. Our instruction also explain how any .cosw files can be restored.

Cosw Virus

The Cosw Ransomware stands for a COMPUTER hazard utilized to blackmail its victims. Cosw Infection might not indicate any type of noticeable symptoms, yet its presence is just discovered as quickly as its work is done.

Cosw Virus - crypted .cosw files

The lack of symptoms is one of the main difficulties with this type of PC viruses. They can permeate right into the attacked system unnoticed, as well as execute their work without revealing their task in the workstation. This is why most customers are not able to do anything to end the virus before it has actually completed its goal, and also the mission of this one, in particular, is to make its targets’ documents unusable through information ciphering and after that suggesting a ransom money need.

The user is reported by means of a message that this infection places on their display that their only remedy of bringing their information back is via the payment of a particular amount of funds. This blackmailing component of this rip-off is very popular among the fraudulences, as well as there’s an entire group of COMPUTER malware that’s utilized in this fashion. This malware category is called Ransomware, and the malware we are currently focusing on most definitely drops under it.

The Cosw malware is only disclosed once it has completed encrypting the documents. The .cosw Ransomware will after that share its needs through an intimidating pop-up alert.

It is by means of this alert that the individuals find out exactly how they are anticipated to move their funds to the cyber scams in charge of the Ransomware infection. In a lot of instances, the ransom money would be asked in a cryptocurrency – BitCoin. These cryptocurrencies are actually hard to trace, as well as a typical user would certainly have no chance of recognizing who they are truly moving their funds to. This, in fact, makes it truly unlikely that the cyberpunk’s true identification would certainly ever before get divulged. It is rather uncommon for a Ransomware cyberpunk to stand before the court, as well as the application of cryptocurrency as the recommended payment service is the major reason for that.

Below you can discover the quotation from the Cosw text file:

 Don't worry, 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" 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:

 Our Telegram account:

How to Cosw virus encrypt your files?

The .cosw Infection document encryption is not going to be eliminated after the ransomware is deleted. The .cosw Virus document encryption access key is promised to be given to you when you pay the ransom amount.

However, it is not uncommon for the hackers that guarantee such threats to promise their sufferers a decryption secret for their encrypted records just to refuse to give that crucial as quickly as the settlement gets refined. Unnecessary to discuss, if you wind up in a condition like this, you would not can doing anything concerning it– your funds would certainly be gone, and also your data would certainly still be hard to reach. This is why it isn’t truly sensible thought to move the repayment, furthermore, if you haven’t chosen any kind of alternate choices that may work.

Even though we stated that the file encryption would continue to be on your papers also after the Ransomware is no more in the system, deleting the virus is still very important. After you get rid of the Ransomware, you may also try the alternate file recovery options we have created for you, and additionally your new data won’t be at threat of being secured. To delete this cryptoviral risk, you are suggested to finish the steps you will run into below.


Name .cosw Virus
Type Ransomware
Threat Level High (Ransomware is thus far the worst malware you can experience)
Symptoms A Ransomware threat such as this one would usually not disclose its existence till the files obtain locked up
Promotion Channel Channels like spam e-mail promotion, and malvertising are normally the ones used to spread Ransomware.
Data Recovery Solution Emsisoft Decrypter
Detection Utility
.cosw may recover itself plenty of times if you don’t get rid of its core files. We suggest downloading LOARIS TROJAN REMOVER to scan for malicious utilities. This may save you a lot of time and efforts to effectively get rid of all possible malware within your device.
Read more about Loaris Trojan Remover (License Agreement, Privacy Policy ).
If Loaris identifies a threat, you will need to buy a license to get rid of it.

Delete Cosw Virus Ransomware

Step 1:

Some of the steps will likely demand you to exit the page. Bookmark it to easily get back to it later.

Reboot in Safe Mode (use this tutorial if you don’t know how to do it).

Step 2:
Exclusive Offer
We get asked this often, so we are clearly mentioning it here: Deleting .cosw manually may take hours and hurt your system in the process. We suggest downloading LOARIS to check if it can identify Cosw's documents for you. 

Click CTRL + SHIFT + ESC simultaneously and go to the Processes Tab. Try to identify which processes are malicious.

Task manager - Cosw Open File Location

Right click on each of them and choose Open File Location. Then inspect the documents with online file checker:

Once you open their folder, end the processes that are contaminated, then get rid of their folders. 

Note:If you are specific something belongs to the risk - get rid of it, even if the scanner doesn't mark it. No anti-virus application can recognize all infections.

Step 3:

Keep holding the Win + R. And then copy & paste the following:

  • notepad %windir%/system32/Drivers/etc/hosts

A new document will open. In case you are hacked, there will be a load of various other IPs linked to your device at the bottom. Examine the picture below:

notepad - suspicious IPs Cosw

In case there are suspicious IPs below “localhost” – get in touch with us in the comments.

Use CTRL + SHIFT + ESC simultaneously and access the Startup Tab:

Task manager - Startup Tab Program Disable

Proceed to Program Name and select “Disable”.

Keep in mind that ransomware may even include a fake developer name to its process. You must check out every process and be persuaded that it is legitimate.

Step 4:
To get rid of Cosw Virus, you may have to deal with system files and registries. Making a mistake and getting rid of the wrong thing may hurt your device.


You can prevent the system damage by selecting LOARIS TROJAN REMOVER - a high-quality Cosw removal software.

Read review about LOARIS TROJAN REMOVER (License Agreement, Privacy Policy ).

Look for the ransomware  in your registries and get rid of the entries. Be very careful –  you can destroy your system if you remove entries not associated with the ransomware.

Type each of the following in the Windows Search Field:

  • %AppData%
  • %LocalAppData%
  • %ProgramData%
  • %WinDir%
  • %Temp%

Get rid of everything in Temp. Finally, simply check out for anything lately added. Don't forget to drop us a comment if you run into any issue!

How to Decrypt .cosw files?

Djvu Ransomware essentially has two versions.

  1. Old Version: Most older extensions (from “.djvu” up to “.carote”) decryption for most of these versions was previously supported by STOPDecrypter tool in case if infected files with an offline key. That same support has been incorporated into the new Emsisoft Decryptor for these old Djvu variants. The decrypter will only decode your files without submitting file pairs if you have an OFFLINE KEY.
  2. New Version: The newest extensions released around the end of August 2019 after the ransomware was changed. This includes .coharos, .shariz, .gero, .hese, .xoza, .seto, peta, .moka, .meds, .kvag, .domm, .karl, .nesa, .boot and etc….These new versions were supported only with Emsisoft Decryptor.

"The decrypter can't decrypt my files?"

For the most part this indicates you have an online ID. It might also suggest your files were secured by a more recent variant of STOP/Djvu.

  • Offline ID. When the ransomware can not link to its command and control web servers while encrypting your files, it utilizes a built-in file encryption key and an integrated ID. Offline ID's usually finish in t1 and are generally easy to identify. Because the offline key and also ID just alter with each variant/extension, everybody who has had their files secured by the same variation will certainly have the same ID as well as the files will be decryptable by the same key (or "exclusive key in the case of RSA security).
  • Online ID. Most of the times the ransomware has the ability to connect to its command as well as control servers when it secures files, and also when this happens the web servers respond by producing arbitrary keys for each and every contaminated computer. Considering that each computer system has its own key, you can not use a key from another computer system to decrypt your data. The decrypter can functioning around this with older versions as long as it has some help, however for more recent variations there is absolutely nothing that can be done to recuperate files.

In case when the tutorial doesn’t help, download the anti-malware tool we suggest or try free online virus checker. Furthermore, you may always ask us in the comments for assistance!

About the author

Valdis Koks

Security engineer, reverse engineering and memory forensics

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