Home / Removal Guide / Ransomware / Djvu Virus / Coharos Virus Removal Guide (+Decrypt .coharos files)

Coharos Virus Removal Guide (+Decrypt .coharos files)

Coharos – General Info

Coharos is a malicious software application working as common ransomware. Michael Gillespie, the well-known malware researcher, very first discovered this new name in the DJVU ransomware family.

Coharos was developed for the sole purpose to encrypt all popular file types. Rationally, as soon as the encryption is effectively achieved, the users are unable to get access to them. Coharos ransomware adds its own “.coharos” to all the encrypted files. For example, the file “price_list.xls”, once crypted by Coharos, will be entitled as “price_list.xls.coharos”. As soon as the file encryption is achieved, Coharos puts its own distinct text document (_readme.txt) into all the folders that store the encrypted files.

The alert mentioned by document requesting for the random os really comparable to the alerts provided by other ransomware dangers belonging to the DJVU family. The caution basically shows that the information has been secured and the only solution to get access to it is to use an unique standalone key. Regretfully, this statement is absolutely real.

The technique to encrypt the files used by Coharos is not totally looked into. Nevertheless, there is no doubt that each computer system owner might be issued an unique decryption key, which is definitely special. It is incredibly difficult to recover the data without the suitable key in location.

“Don’t worry, you can return all your files!”, from text file message:

Don't worry, you can return all your files! virus

One more peculiarity of the Coharos ransomware is that the users are unable to get access to the key. The decrypting key is hosted on a special server under the complete control by the crooks who have actually introduced the Coharos infection into the internet. In order to acquire the key and restore the essential data, the users are informed to get in touch with the scams by means of e-mail or by telegram and to pay the ransom in the amount of $980.

The message also says that the people should call the Coharos authors within 72 hours upon the minute of the information file encryption. The alert shows that by doing so individuals will acquire a 50% discount rate, therefore, the ransom quantity falls to $490.

No matter what the amount of the ransom is, we strongly encourage that you do not pay the ransom. There is no guarantee that these online scoundrels will keep their promises, so they may not care at all what the victims feel about the encryption, even when the amount of the ransom is gotten into their accounts. Thus, paying ransom typically does not result in a successful healing. So, the users may just lose their money for absolutely nothing.

Similarly, we urge you not to contact the frauds as they advise. Do not move loan into their wallets. There are no applications that might break the Coharos ransomware or restore the data at no cost. Therefore, the only appropriate choice is to bring back the data from possible backups (if available).

Virus Summary

NameCoharos Ransomware
File Extensioncoharos
TypeRansomware
FamilyDJVU
Short DescriptionThe ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
SymptomsFile encryption by the ransomware is performed by means of the AES-556 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .coharos extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsMtogas, Krusop, Londec
Removal Tool   GridinSoft Anti-Malware

Do not forget that the Internet is now full of infections comparable to the Coharos ransomware. For example, this particular danger is generally similar to Brusaf and other ransomware-type infections. These damaging energies have actually been established in order to secure the important data and reveal the demand for the users to pay the ransom. All these infections use the identical algorithm to produce the specific key for successful data decryption.

Unless the Coharos ransomware is still under the development process or has actually got some concealed bugs, it is not possible to bring back the information by hand. Therefore, the only working solution to prevent the loss of your important information is to regularly keep updated backups of all your essential data.

Another crucial piece of recommendations is to keep the backups on special storage not connected to your primary PC. For example, you might store it on the USB Flash Drive, or some external disk drive, or by using the cloud data storage services. Keeping the backups on your routine drive is extremely dangerous, given that the backup might likewise be encrypted by the Coharos ransomware.

Leaks for the Coharos ransomware attack.

Coharos uses many courses to infiltrate the susceptible computers. It is not certain what particular technique was used in your case, nevertheless, the intrusion may occur via the following channels:

  • bundling with third-party programs, generally free apps;
  • spam emails from the unidentified senders;
  • websites supplying free hosting;
  • P2P (peer-to-peer) torrent downloads.

There are times when the Coharos virus might camouflage itself as some genuine application, for instance, through the deceptive alerts requiring setup of some software update. This is the most typical technique used by the scams to inject the Coharos virus files into the system. This way users partly take part in its installation, without clearly understanding the risk.

Furthermore, the scams might send unsolicited spam email with tricky signals encouraging the people to open suspicious accessories or click on some download links, for instance, those encouraging the people to open certain photos, text files, tax documents and other info.

No doubt, opening these files or clicking the harmful links may essentially harm the system. Fake Acrobat Reader update notifications may lead to the Coharos ransomware seepage. Likewise, downloading the cracked software may in addition include the ransomware installer. The last however not the least, installation of Coharos may take place through some Trojan horses that might be installed stealthily into the system and without the user’s direct authorization and even permission.

Avoiding the Coharos ransomware injection.

Obviously, there is no outright assurance that your computer system will be always devoid of any malware attacks, nevertheless, we wish to share some useful ideas with you to make it much safer. Ensure to pay really attention while searching the web and particularly while downloading cost-free programs. Do not open any suspicious email accessories, particularly if the sender is not known to you.

Do not forget that particular freeware installer might likewise contain some other extra apps in the bundle. These extra applications might be really harmful. It is of utmost importance to keep your anti-virus software and your os in general to be constantly properly updated.

It is rather logical that downloading cracked apps is prohibited, nevertheless, additionally, such unauthorized software application usage may also bring severe damage to your PC. For this reason, do not download any cracked programs. Plus, the reality that your existing anti-virus did not secure the system from the Coharos ransomware is an excellent factor for you to reevaluate your choices and switch to another program that can render the safeguarding functions on a much better level.

Below please find the quotation from the Coharos text file:

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-2P5WrE5b9f
 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:
 gorentos@bitmessage.ch
  
 Reserve e-mail address to contact us:
 gorentos2@firemail.cc
  
 Our Telegram account:
 @datarestore

Screenshot of files with “.coharos” extension added by the virus:”

Coharos Ransomware - encrypt files with .coharos extension

Use GridinSoft Anti-Malware to remove Coharos ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can get GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

[Total: 1    Average: 3/5]
Sending
User Review
0 (0 votes)
Comments Rating 0 (0 reviews)

About Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

Check Also

How to remove Ntrollegebouncils.info, window

The Ntrollegebouncils.info, pop-ups are a social engineering attack that tries to trick users into signing …

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.