Cosw is classified by our malware research team as the DJVU cryptoware family. Another variants of this family here: About STOP/Djvu Ransomware. There are certain antiviruses that bypass it as well as therefore permitting its irruption. Actually, we have to term it that way, because of the “.cosw” extension that it attaches at the end of your data.
Let’s clarify. Cosw virus assaults your PC through stealth and knack also. After that, once entered it makes use of AES or RSA encoding logics to lock your documents.
Cosw encrypted your files, but that might not be the only damage done to you. The viruses might still be in your computer. To remove them, we suggest downloading GridinSoft Anti-Malware.
Download GridinSoft Anti-Malware
After that, they extort you for their unblocke. After Cosw evades right into your device, it places every one of your documents under closure. It appends its very specific extension “.cosw” at the end, thus making records inaccessible.
Files with “.cosw” extension appended by the Cosw virus:
It reaches files, archives, photos, songs, filmings, all of it! Thereafter, you can’t longer open them. Relocating files or retitling it will not help. Sole remedy to unblocke your files from the cryptoware’s keep is decryption. The ransomware expects you to give redemption money if you wish to get your data back. It makes that clear (in the ransom message) it will decipher records after payoff.
The message is usually a text file, left on your desktop. You can also find it in every directory that contains encrypted documents. It describes your worries and also proposes you an answer. According to Cosw, sole remedy to release your documents is with a unique deciphering key. And also, to obtain it you have to give a ransom. The sum is $980, as well as it’s generally asked for in cryptocurrency.
The file “_readme.txt” by the Cosw ransomware states the following info:
ATTENTION! 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: https://we.tl/t-WbgTMF1Jmw 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: firstname.lastname@example.org Reserve e-mail address to contact us: email@example.com Our Telegram account: @datarestore Your personal ID: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Do NOT pay for decrypt of “cosw” files!
The Cosw infection guarantees, to send you the key after you render. As well as, that’s it. That’s all you obtain – a promise. You have no guarantees that conformity ends in something suitable. Do not rest on words of internet criminals. That is people, that will fool you. Do NOT disburse them a cent. Don’t call them Do NOT comply with their needs.
How did my PC got harmed by Cosw?
Your computers get corrupted with the Cosw malware because of your failure to be on the guard. Some people do not notice important details while surfing the Internet or downloading different programs.
The Cosw virus uses the old yet gold annexationist methods to deceive you. And creeps in unobserved. That involves concealing behind damaged web links, sites, and torrents. It applies freeware as a way to hide itself. And shapes as a phony system or program update. Like, Adobe Flash Player or Java.
Yet more often than not, it uses junk emails. You open an email that seems to find from a well-known company. Like, Amazon or PayPal. And, the email suggests you to follow a web link, or download and install an program. If you do, you end up with ransomware.
Bear in mind that these types of risks are fooling your inattention. They need you to hurry and skip doing due diligence. That relieve their hidden infiltration. They rest on you to leave your fate to chance. Do not! Do not take recklessness over care. One keeps malwares out. The other welcomes them in.
Therefore, do not pay them a fee. Don’t connect to the virtual criminals. If you do, you’ll regret it. It’s a futile effort to return your files, as well as it will not end well for you. Below’s why.
There are a few circumstances that can interpret when you see the blackmail funds message on your desctop. Claim, you decide to concede. You connect to the racketeers, pay their redemption cash, and wait. You wait on them to send you the decryption trick they assured. Well, what happens if they do not?
Even so, you have no warranties. All, you rely on, is a word. Can you absolutely think words of cyber criminal? The answer is ‘No.’ These are people, who will surely disenchant you. Don’t provide money! There’s also another alternative.
They can actually send you a decryption key. However, when you try to open it, it fails to work.
Yes, they can send you the incorrect code. After that, you have much less funds, as well as your files continues to be locked. Don’t pay! And also your optimum scenario isn’t a reason for delight. What takes place after you send the ransom cash, obtain the appropriate trick, as well as totally free your data? Well? Consider it. You paid money to eliminate a sign and symptom, yet not the malware triggering it.
So, you remove the enciphering, yet the Cosw virus stays. It’s still creeping in the corners of your system, complimentary to attack once again. After that, you’re back at a new start.
Why is Cosw unsafe?
In addition, to encipher a sufferer’s documents, the Cosw ransomware has also started to install the Azorult Spyware on PC to steal account data, cyber money wallets, desktop records, and more.
So, your computer got attacked by Cosw and also probably you have actually lost time trying to delete it manually. We are absolutely positive that the remedy below will certainly be usefull in removing Cosw in an automated method.
How to protect PC from Cosw ransomware?
However, let us initially speak about preclusion of such cryptoware assaults in the future. There is something exists that you can do to avoid this kind of critical hazard from entering into your device beforehand?
There are a couple of things we wish to talk about here. First one is your individual liability for being unbelievably thoughtful while you utilize your device and largely while you browse the web. When examining your e-mail and see some fishy attachments consisted of, do not rush to open them.
The same way, when you get on Facebook and social networks also someone you know sends you messages attaching accessories, be very careful, especially if these are some .exe files.
The second thing to take into consideration is researching the reliability of your current security tool. Regretfully, there are numerous safety and security applications nowadays that just state to be trustworthy, whereas in times of real infection intrusions they simply unable to do the task as announced.
In case Cosw penetrated into your device this indicates that your current anti-virus did not do its promoted assignment as well as really fell short to protect your system. So obviously it is a ratio for you to overestimate your choices and also definitely change over to some other application that can most certainly guarantee the wanted level of safety.
Not all antiviruses are good
We can additionally discuss some part of users that like not to have any kind of anti-malware software program at all. Definitely, this is a major error from their side, due to the fact that presently the net has lots of virtual hazards that may secretly penetrate perceptive systems, especially those that are not tooled with some standard degree of protection.
So, having anti-malware incessantly running and guiding your computer is a necessary point in today’s cyber world.
Cosw is getting on the nerves of many people, so you’re not its only victim.
People ask how to fix the problem effectively. Removal of the infection manually may be a long-lasting undertaking and can damage other important system files. Scan your PC with GridinSoft Anti-Malware to detect and delete Cosw in the right way.
Click to Download GridinSoft Anti-Malware.
Cosw removal guide
STEP 1. Recover files from Cosw ransomware encryption
You can download free decryption tool here: Decryptor for STOP Djvu. But it work when the Cosw virus used an offline key for encryption.
If key does not found, we advice to restore your PC
There are a lot of different ransomware viruses on the internet. Some of them are more dangerous than the others because they not only leaving malicious processes to protect themselves, but also removing backups of your system to make the recovery process impossible.
Please Note: Not all ransomware infections are able to remove backups of your system, so it is always worth to try a windows recovery.
We recommend use Safe Mode with command prompt to safely perform a recovery of your files. You will have to reboot your computer, so you better save this instruction:
How to Restore Files from a Backup in Windows 7/8/10
STEP 2. Removing Cosw ransomware malicious files
Once the recovery process is complete, you should consider scanning your computer with a GridinSoft Anti-Malware in order to find any traces of Cosw infection. Though some ransomware viruses are removing themselves right after the encryption of your files, some may leave malicious processes on your computer for special purposes of cyber criminals.
Run GridinSoft Anti-Malware and choose the scan type, which is suitable for your needs. Of course, for the accuratest scan results we recommend you to choose the “Full Scan”.
Give Anti-Malware a little time to check your system:
Move to quarantine all the viruses and unwanted files, that you see in the results list:
Enjoy the malware removal process:
Use of On-run protection may additionaly prevent different types of cyber attacks, our protect may flag the downloader of the ransomware as a malicious application preventing the download of Cosw.
STEP 3. Prevent the Cosw virus infection
Besides the protection tool, you should read and learn few simple rules. Follow them every time you work on your computer and your will decrease chances of your infection to a minimum:
- Don’t open suspicious spam letters. No way! Be very careful with your downloads. Download and install software preferably from its official website.
- Do backups of your important files regularly. Storing your really important files in few different places is a good decision.
- Keep your PC free from adware, hijackers and PUPs The infected computer will be more likely compromised with other malicious software, and ransomware is not an exception in this case.
- Don’t panic and be reasonable. Don’t pay the ransom fee right after you got infected, it is always best to search on the internet for some answers. It is possible that someone have developed a decryption tool that might help you.