Cosd is assorted by our virus analyst team as the DJVU ransomware family. Another variants of this family is Plam, Pola, Wbxd, and some others. There are certain scanners that ignore it as well as therefore letting its invasion. Actually, we have to name it so, because of the “.cosd” extension that it adds at the end of your files.
Let’s clarify. Cosd ransomware attacks your computer through trick and sleight also. After that, once intruded it practices AES or RSA encryption logics to lock your data.
Then, they extort you for their decode. After Cosd gets round right into your system, it places every one of your files under lock-down. It joins its very specific extension “.cosd” at the end, thus making documents unavailable.
Files with “.cosd” extension appended by the Cosd virus:
It reaches files, registers, images, music, movies, all of it! Thereafter, you can’t longer view them. Displacing the data or redefining it will not assist. Exclusive remedy to release your data from the virus’ keep is decryption. The virus expects you to pay buyout currency if you wish to get your data back. It makes that clear (in the ransom text) it will decipher records after defrayal.
The note is generally a text file, left on your desktop. You can also locate it in each folder that contains encoded documents. It describes your troubles and also offers you a solution. According to Cosd, sole remedy to unblock your files is with a unique deciphering key. And also, to obtain it you have to disburse a redemption. The amount is $980, as well as it’s normally asked for in Bitcoins.
The note by the Cosd 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: email@example.com Reserve e-mail address to contact us: firstname.lastname@example.org Our Telegram account: @datarestore Your personal ID: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Do NOT send money for decrypt of “cosd” files!
The Cosd ransomware guarantees, to send you the code after you disburse. As well as, that’s it. That’s all you obtain – a promise. You have no guarantees that obedience finishes in something appropriate. Do not rely on words of cyber criminals. That is people, that will fool you. Do NOT pay them a cent. Don’t call them Do NOT comply with their needs.
How did my PC got harmed by Cosd?
Your PCs get corrupted with the Cosd ransomware because of your failure to be on alert. Some people do not point out important details while browsing the Internet or installing various applications.
The Cosd infection uses the old but good annexationist techniques to deceive you. And rushes in unnoticed. That includes disguising behind damaged web links, sites, and torrents. It practices 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 yes than not, it utilizes spam emails. You receive an email that seems to find from a well-known brand. Like, Amazon or PayPal. And, the email incites you to follow a web link, or download and install an accessory. If you do, you end up with cryptoware.
Keep in mind that these types of risks are fooling your oscitancy. They need you to rush and lose doing due diligence. That eases their latent penetration. They rely on you to leave your fate to chance. Do not! Do not take rashness over care. One keeps viruses out. The other welcomes them in.
Therefore, do not disburse them a fee. Don’t contact to the cyber kidnappers. If you do, you’ll regret it. It’s a vain effort to recover your data, as well as it will not end well for you. Below’s why.
There are a few occasions that can explain when you see the blackmail money note on your display. Claim, you resolve to concede. You connect to the extortionists, disburse their buyout funds, and wait. You wait on them to send you the decoding trick they guaranteed. Well, what happens if they do not?
However, you have no guarantees. All, you rest on, is a word. Can you absolutely think pledges of virtual criminal? The answer is ‘No.’ These are persons, who will certainly let down you. Don’t provide money! There’s also another choice.
They can actually send you a decryption key. However, when you effort to execute it, it fails to work.
Yes, they can send you the unfaithful code. After that, you have much less cash, as well as your files continues to be blocked. Don’t render! And also your top scenario isn’t a reason for enthusiasm. What takes place after you send the ransom funds, obtain the appropriate trick, as well as totally free your documents? Well? Consider it. You paid cash to eliminate a sign and symptom, yet not the infection triggering it.
So, you remove the enciphering, yet the Cosd malware stays. It’s still prowling in the hooks of your system, complimentary to harm once again. After that, you’re back at a new start.
Why is Cosd unsafe?
Moreover, to encode a victim’s files, the Cosd virus has also started to install the Azorult Spyware on PC to steal account data, cyber money wallets, desktop data, and more.
So, your computer obtained assaulted by Cosd and also probably you have actually lost time trying to fix it manually. We are absolutely positive that the remedy below will certainly be effective in removing Cosd in an automated manner.
How to protect PC from Cosd ransomware?
However, let us initially speak about prevention of such ransomware attacks in the future. There is something exists that you can do to get away from this kind of menacing menace from entering into your computer beforehand?
There are a couple of things we wish to talk about here. First one is your individual accountability for being beyond belief attentive while you utilize your PC and largely while you surf the internet. When examining your e-mail and see some doubtful attachments consisted of, do not hurry to view them.
The same way, when you get on Facebook and social networks also someone you communicate with sends you messages attaching accessories, be very attentive, specifically if these are some exe-extension files.
Another thing to take into account is examining the trustworthiness of your current security tool. Unfortunately, there are plurals safety and security softwares today that just state to be credible, whereas in times of real virus invasions they simply fail to do the task as announced.
In case Cosd penetrated into your laptop this specifies that your current security tool did not do its declared assignment as well as really fell short to protect your system. So obviously it is a ratio for you to revalue your choices and also definitely change over to some other program that can most exactly assure the wanted level of safety.
Not all antiviruses are good
We can extra discuss some portion of users that like not to have any kind of protection software program at all. Definitely, this is a big error from their side, due to the fact that presently the net has dozens of cyber hazards that may secretly penetrate susceptible systems, particularly those that are not appointed with some standard degree of safety.
So, having antivirus permanently working and guiding your device is a necessary point in today’s virtual world.
Cosd is getting on the nerves of many people, so you’re not its only victim.
People ask how to repair the problem effectively. Getting rid 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 Cosd in the right way.
Click to Download GridinSoft Anti-Malware.
Cosd removal guide
STEP 1. Recover files from Cosd ransomware encryption
You can download free decryption tool here: Decryptor for STOP Djvu. But it work when the Cosd 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:
STEP 2. Removing Cosd 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 Cosd 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 Cosd.
STEP 3. Prevent the Cosd 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 applications 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 system 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.