Remove Dewar Virus (+Decrypt .[kryzikrut@airmail.cc].dewar files) – Phobos Ransomware

Dewar Virus Ransomware

The Dewar mean a ransomware-type infection. The virus comes from the Phobos ransomware family. Dewar was elaborated specifically to encrypt all major file types. Once the file is encrypted people are not able to use them. Dewar adds the “.[kryzikrut@airmail.cc].dewar” extension for each file encrypted by it. For example, the file “myphoto.jpg“, as soon as encrypted by Dewar, will be renamed into “myphoto.jpg.[kryzikrut@airmail.cc].dewar“. As quickly as the encryption is finished, Dewar places a special text file into every folder containing the encrypted data.

The message given by Dewar text file requesting the ransom is definitely the like the statements given by other ransomware representatives belonging to the Phobos family. It literally discusses that the information is encrypted and that the only way to bring back it is to use a a special decryption key. Regretfully, this is absolutely true. The sort of cryptography mechanism used by Dewar is still not appropriately examined. Still, it is absolutely particular that each victim may be given the specific decryption key, which is absolutely distinct. It is difficult to bring back the files without the key available.

Another technique of Dewar is that the victims cannot access to the key. The key is stored on a specific server run by the frauds associated with Dewar ransomware. To get the key and recover the important info people have to pay the ransom.

Nonetheless, irrespective of the asked for amount, people must keep away from paying the virus. Cyber frauds are unfair, so they tend to completely disregard what their victims feel about the issue, even when the payment reaches their pockets. This is why paying the ransom generally does not provide any positive result and people just waste their money for absolutely nothing.

We strongly recommend that you do not contact these crooks and definitely do not transfer money into their accounts. It is said to admit that there are no utilities able to crack Dewar ransomware and to recover the data data totally free. Thus, the just best decision is to recover the lost information from the available backup.

Virus Summary

NameDewar Ransomware
File Extension.[kryzikrut@airmail.cc].dewar
TypeRansomware
FamilyPhobos
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 and RSA encryption algorithms. Once the encryption is completed, the ransomware adds its special [kryzikrut@airmail.cc].dewar extension to all the files modified by it.
Distribution MethodSpam Emails, Email Attachments
Similar InfectionsCaley, Makop, Bablo
Removal Tool   GridinSoft Anti-Malware

Remember that the world wide web is now overwhelmed with threats that look similar to Dewar ransomware. It is similar Caley and many other ransomware-type threats. Harmful programs of such kind are usually elaborated to encrypt important data and to set forth the demand prior to the user to pay the ransom. The peculiarity of all such ransomware threats is that all apply a similar algorithm to create the special decryption key for data decryption.

Hence, as long as the ransomware is still being developed or has some hidden bugs, by hand recovering the information is just not feasible. The only method to avoid the loss of your essential information is to routinely create backups of your important information.

Bear in mind that even if you create such backups, they should be placed into a special storage utility not connect to your main PC. You may use the USB Flash Drive or external disk drive for this purpose, or refer to the help of the cloud storage. If you keep your backup files on your common system they may be encrypted along with other files, so it’s definitely not a good storage location.

How did ransomware infect my system?

There are several ways used by online scams to distribute Dewar ransomware. Despite the fact that it is uncertain how precisely Dewar injects your system, there are some leaks through which it may infiltrate the system:

  • integration with third-party apps, especially freeware;
  • spam emails from unidentified senders;
  • websites rendering free hosting services;
  • pirated peer-to-peer (P2P) downloads.

Often Dewar virus might exist as some legitimate software application, for instance, in the pop-ups advising users to execute some crucial software updates. This is the typical technique used by online scams to persuade people into downloading and installing Dewar infection manually, by means of their direct participation in the installation process.

Additionally, the criminals might describe different e-mail spam strategies to inject malicious codes into PC. So, they may describe to sending unsolicited spam e-mails with tricky notifications promoting users to download the attachments or click on certain download links, for example, the ones motivating users to open some video, files, tax reports or invoices.

Needless to mention, opening such files or clicking on such dangerous links may significantly harm the system. Fictitious Adobe Flash Player update alerts may result in Dewar ransom injection. When it comes to the cracked applications, these illegally downloaded programs may likewise consist of malicious codes resulting in Dewar secret installation. Lastly, injection of Dewar may happen by means of Trojans that secretly get injected into the system and set up destructive tools without the user’s permission.

Is there any method to avoid the injection of Dewar ransomware?

Even though there is no 100% guarantee to prevent your PC from getting infected, there are some pieces of advice we want to show with you. To start with, be extremely careful when you surf the web and especially while downloading totally free programs. Keep away from opening suspicious email attachments, especially when the sender of the email is not familiar to you.

Bear in mind that some freeware installers may include other unwanted utilities in the bundle, so they may be harmful. Ensure that your current antivirus software and your entire OS is always appropriately updated.

Of course, downloading pirated software is prohibited and may lead to necessary damage to be made for your system. Hence, stay away from downloading cracked software. You are also strongly recommended to reconsider your existing security software and potentially change to another security solution that can render much better services of defending your PC.

Below please find the quotation from the Dewar text file:

All your files have been encrypted!
All your files have been encrypted due to a security problem with your PC. If you want to restore them, write us to the e-mail: kryzikrut@airmail.cc and this e-mail:kokux@tutanota.com
Write this ID in the title of your message 1E857D00-2718
Our operator is available in the messenger Telegram: hxxps://telegram.org/. To find us, enter the alias @hpdec in the messenger search box.
You can install the Jabber client and write to us in support of decrypt_here@xmpp.jp
You have to pay for decryption in Bitcoins. The price depends on how fast you write to us. After payment we will send you the tool that will decrypt all your files.
Free decryption as guarantee
Before paying you can send us up to 5 files for free decryption. The total size of files must be less than 4Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.)
How to obtain Bitcoins
The easiest way to buy bitcoins is LocalBitcoins site. You have to register, click \'Buy bitcoins\', and select the seller by payment method and price.
hxxps://localbitcoins.com/buy_bitcoins
Also you can find other places to buy Bitcoins and beginners guide here:
hxxp://www.coindesk.com/information/how-can-i-buy-bitcoins/
Attention!

Do not rename encrypted files.
Do not try to decrypt your data using third party software, it may cause permanent data loss.
Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.
Jabber client installation instructions:
Download the jabber (Pidgin) client from hxxps://pidgin.im/download/windows/
After installation, the Pidgin client will prompt you to create a new account.
Click \"Add\"
In the \"Protocol\" field, select XMPP
In \"Username\" - come up with any name
In the field \"domain\" - enter any jabber-server, there are a lot of them, for example - exploit.im
Create a password
At the bottom, put a tick \"Create account\"
Click add
If you selected \"domain\" - exploit.im, then a new window should appear in which you will need to re-enter your data:
User
password
You will need to follow the link to the captcha (there you will see the characters that you need to enter in the field below)
If you don\'t understand our Pidgin client installation instructions, you can find many installation tutorials on youtube - hxxps://www.youtube.com/results?search_query=pidgin+jabber+install

Screenshot of files with “.[kryzikrut@airmail.cc].dewar” extension added by the ransomware:
Dewar Ransomware - encrypt files with .[kryzikrut@airmail.cc].dewar extension

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

1.Download GridinSoft Anti-Malware.

You can download 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

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

Remove Ytoffline.net in few clicks

What Is Ytoffline.net? Ytoffline.net and also other unwanted sites could begin appearing on your open …

Leave a Reply

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