Dewar (.dewar) ransomware virus - removal and decryption options

What kind of malware is Dewar?

Dewar is a malicious program belonging to the Phobos ransomware family. Systems infected with this malware have their data encrypted and users receive ransom demands for decryption. During the encryption process, all affected files are renamed according to the following pattern: original filename, unique ID, developer's email address and the ".dewar" extension.

For example, a file like "1.jpg" would appear as something similar to "1.jpg.id[1E857D00-2718].[kryzikrut@airmail.cc].dewar".

Screenshot of files encrypted by Dewar (".dewar" extension):

Ransom note overview

The text file states that the victims' data has been encrypted. To get further instructions about how to decrypt it, they must establish contact with the cyber criminals behind the infection via email, Telegram or Jabber instant messaging platforms. The ransom message in the pop-up window ("info.hta") provides more information.

This message repeats the initial statement concerning file encryption and adds that, when initiating contact with the ransomware developers, users must include their IDs (found in the pop-up and filenames of each encrypted file).

While the size of ransom is not specified (this will depend on how quickly contact is established), victims are informed that it must be paid in the Bitcoin cryptocurrency. Links are provided for how and from where to acquire Bitcoins. Users are warned that renaming compromised files or attempting decryption with third party tools/software can result in permanent data loss.

Prior to making payment, victims can test decryption by sending up to five encrypted files. The size of these test files cannot exceed 4 MB in total. Additionally, they must not be archived or contain valuable information (e.g. databases, backups, large excel sheets, etc.).

Lengthy instructions are provided on how to install and create an account in Jabber (Pidgin instant messaging client). Should these directions be confusing, the message suggests searching installation tutorials on YouTube.

More about ransomware

Unfortunately, in most cases of ransomware infections, decryption is impossible without the involvement of the criminals responsible, unless the malware in question is still in development or has bugs/flaws. Whatever the case, you are strongly advised against paying cyber criminals.

Despite meeting the ransom demands, victims do not receive the promised decryption tools/software. Therefore, their data remains encrypted and useless, and they also experience significant financial loss. To prevent Dewar from further encryption, it must be removed from the operating system, however, removal will not restore already affected files.

The only viable solution is recovering data from a backup, if one was created before the infection and was stored in a different location.

Similarities/differences between ransomware variants

2NEW, The Cursed Murderer, and Alka are some examples of other ransomware infections. Malicious programs in this category encrypt data and demand payment for decryption tools/software. There are two main differences: the cryptographic algorithm they use (symmetric or asymmetric) and ransom size.

The latter varies between three and four digit sums (in USD). To ensure data safety, you are advised to keep backups on remote servers and/or unplugged storage (preferably in several separate locations).

How did ransomware infect my computer?

Ransomware and other malware is primarily spread via trojans, spam campaigns, illegal activation tools ("cracks"), fake updaters and untrusted download sources. Trojans are malicious programs capable of causing chain infections (i.e., download/install additional malware).

Spam campaigns are used to send thousands of deceptive emails with infectious files attached to (or linked inside) them. These attachments come in various formats (e.g. executable and archive files, Microsoft Office and PDF documents, JavaScript, etc.). When the dangerous files are opened, the infection is initiated.

Rather than activating licensed products, illegal activation ("cracking") tools can download/install malicious software. Rogue updaters infect systems by exploiting flaws of outdated programs or simply downloading and installing malware, rather than the promised updates.

Unofficial and free file-hosting sites, P2P sharing networks (BitTorrent, eMule, Gnutella, etc.), third party downloaders and other untrusted sources can offer malicious programs for download (e.g. disguised as or bundled with normal software).

Threat Summary:

Name	Dewar virus
Threat Type	Ransomware, Crypto Virus, Files locker.
Encrypted Files Extension	.dewar (files are also appended with a unique ID and cyber criminals' email address).
Ransom Demand Message	info.hta and info.txt
Cyber Criminal Contact	kryzikrut@airmail.cc and kokux@tutanota.com, zalarubata@airmail.cc, cristianominogue@cock.li, rdphelp@tutanota.com, deltatech@tuta.io, yanyddiel@airmail.cc, zanolven@airmail.cc, creampie@ctemplar.com, correctway@qq.com, red@gytmail.com, waleon@airmail.cc, wang_team777@aol.com, mccunesina@aol.com, howtodecrypt45@cock.li, danianci@airmail.cc, deltatechit@protonmail.com, gabriele.keeler@aol.com, pennmargery@aol.com, walmesleyemerita@aol.com, Jamees0101@outlook.com, chagenak@airmail.cc, white@gytmail.com, ubtc@cock.li, mr.helper@qq.com, covid20encoder@tutanota.com, @hpdec (Telegram), decrypt_here@xmpp.jp (Jabber), spacexhuman@tutanota.com, spacexhuman@protonmail.com, cristianominogue@tuta.io, backupassist@jabb3r.de, dxdiag010@tutanota.com, rdphelp@cock.li, backupassist@qq.com, datalost@foxmail.com, spacexhuman@jabb.im (Jabber)
Detection Names	Avast (Win32:Malware-gen), BitDefender (Gen:Variant.Ransom.Phobos.62), ESET-NOD32 (A Variant Of Win32/Filecoder.Phobos.C), Kaspersky (HEUR:Trojan.Win32.Generic), Full List Of Detections (VirusTotal)
Symptoms	Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods	Infected email attachments (macros), torrent websites, malicious ads.
Damage	All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Malware Removal (Windows)	To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. ▼ Download Combo Cleaner To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

How to protect yourself from ransomware infections

Do not open suspicious or irrelevant emails. Furthermore, any attachments or links present in dubious mail must never be opened, since doing so can result in an infection. Use only official and verified download channels. Software should be activated and updated with tools/functions provided by genuine developers.

Do not use illegal activation tools ("cracks") or third party updaters, as they can cause high-risk infections. For device safety and integrity, have a reputable anti-virus/anti-spyware suite installed and kept up to date. Furthermore, this should be used to perform regular system scans and removal of detected/potential threats.

If your computer is already infected with Dewar, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this ransomware.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data ("info.hta"'):

Text presented in Dewar ransomware pop-up window ("info.hta"):

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 Dewar text file ("info.txt"):

Text presented in this file:

!!!All of your files are encrypted!!!
To decrypt them send e-mail to this address: kryzikrut@airmail.cc and this: kokux@tutanota.com
For ease of communication, you can install the telegram messenger.
Messenger site hxxps://telegram.org/
To find us, enter the alias @hpdec in the messenger search box.
jabber: decrypt_here@xmpp.jp

Screenshot of a pop-up window delivered by an updated variant of Dewar ransomware:

Text presented within:

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 Sonar messanger.
To do this you need to download Tor browser by link - hxxps://www.torproject.org/download/
V2 url: hxxp://sonarmsniko2lvfu.onion/contact/tortuga
V3 url: hxxp://sonarmsng5vzwqezlvtu2iiwwdn3dxkhotftikhowpfjuzg7p3ca5eid.onion/contact/tortuga
Register first, then login.
If within 24 hours we have not responded, then write to this contact V2 url: hxxp://sonarmsniko2lvfu.onion/contact/phoboshelp
If within 48 hours we have not responded, then write to this contact captjacksparrow@gmx.com or captjacksparrow@mailfence.com
You have to pay for decryption only 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).
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:
hxxps://www.buybitcoinworldwide.com/
Attention!
Do not rename encrypted files.
Do not try to decrypt your data using third party software, it may cause permanent data loss. We use strong algorithm AES-256 with RSA-1024 asymmetric encryption.
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.
All third parties and scammers make test files with our help, because only we can decrypt them, but you are the one who sends them these files.

Screenshot of a text file delivered by an updated variant of Dewar ransomware:

Text presented within:

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 Sonar messanger.
To do this you need to download Tor browser by link - hxxps://www.torproject.org/download/
V2 url: hxxp://sonarmsniko2lvfu.onion/contact/tortuga
V3 url: hxxp://sonarmsng5vzwqezlvtu2iiwwdn3dxkhotftikhowpfjuzg7p3ca5eid.onion/contact/tortuga
Register first, then login. Write this ID in the title or in the subject of your message -
If within 24 hours we have not responded, then write to this contact V2 url: hxxp://sonarmsniko2lvfu.onion/contact/phoboshelp
If within 48 hours we have not responded, then write to this contact captjacksparrow@gmx.com or captjacksparrow@mailfence.com
You have to pay for decryption only 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).
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:
hxxps://www.buybitcoinworldwide.com/
Attention!
Do not rename encrypted files.
Do not try to decrypt your data using third party software, it may cause permanent data loss. We use strong algorithm AES-256 with RSA-1024 asymmetric encryption.
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.
All third parties and scammers make test files with our help, because only we can decrypt them, but you are the one who sends them these files.

Dewar ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

Video suggesting what steps should be taken in case of a ransomware infection:

Quick menu:

• What is Dewar virus?
• STEP 1. Reporting ransomware to authorities.
• STEP 2. Isolating the infected device.
• STEP 3. Identifying the ransomware infection.
• STEP 4. Searching for ransomware decryption tools.
• STEP 5. Restoring files with data recovery tools.
• STEP 6. Creating data backups.

Reporting ransomware to authorities:

If you are a victim of a ransomware attack we recommend reporting this incident to authorities. By providing information to law enforcement agencies you will help track cybercrime and potentially assist in the prosecution of the attackers. Here's a list of authorities where you should report a ransomware attack. For the complete list of local cybersecurity centers and information on why you should report ransomware attacks, read this article.

List of local authorities where ransomware attacks should be reported (choose one depending on your residence address):

•  USA - Internet Crime Complaint Centre IC3
•  United Kingdom - Action Fraud
•  Spain - Policía Nacional
•  France - Ministère de l'Intérieur
•  Germany - Polizei
•  Italy - Polizia di Stato
•  The Netherlands - Politie
•  Poland - Policja
•  Portugal - Polícia Judiciária

Isolating the infected device:

Some ransomware-type infections are designed to encrypt files within external storage devices, infect them, and even spread throughout the entire local network. For this reason, it is very important to isolate the infected device (computer) as soon as possible.

Step 1: Disconnect from the internet.

The easiest way to disconnect a computer from the internet is to unplug the Ethernet cable from the motherboard, however, some devices are connected via a wireless network and for some users (especially those who are not particularly tech-savvy), disconnecting cables may seem troublesome. Therefore, you can also disconnect the system manually via Control Panel:

Navigate to the "Control Panel", click the search bar in the upper-right corner of the screen, enter "Network and Sharing Center" and select search result:

Click the "Change adapter settings" option in the upper-left corner of the window:

Right-click on each connection point and select "Disable". Once disabled, the system will no longer be connected to the internet. To re-enable the connection points, simply right-click again and select "Enable".

Step 2: Unplug all storage devices.

As mentioned above, ransomware might encrypt data and infiltrate all storage devices that are connected to the computer. For this reason, all external storage devices (flash drives, portable hard drives, etc.) should be disconnected immediately, however, we strongly advise you to eject each device before disconnecting to prevent data corruption:

Navigate to "My Computer", right-click on each connected device, and select "Eject":

Step 3: Log-out of cloud storage accounts.

Some ransomware-type might be able to hijack software that handles data stored within "the Cloud". Therefore, the data could be corrupted/encrypted. For this reason, you should log-out of all cloud storage accounts within browsers and other related software. You should also consider temporarily uninstalling the cloud-management software until the infection is completely removed.

Identify the ransomware infection:

To properly handle an infection, one must first identify it. Some ransomware infections use ransom-demand messages as an introduction (see the WALDO ransomware text file below).

This, however, is rare. In most cases, ransomware infections deliver more direct messages simply stating that data is encrypted and that victims must pay some sort of ransom. Note that ransomware-type infections typically generate messages with different file names (for example, "_readme.txt", "READ-ME.txt", "DECRYPTION_INSTRUCTIONS.txt", "DECRYPT_FILES.html", etc.). Therefore, using the name of a ransom message may seem like a good way to identify the infection. The problem is that most of these names are generic and some infections use the same names, even though the delivered messages are different and the infections themselves are unrelated. Therefore, using the message filename alone can be ineffective and even lead to permanent data loss (for example, by attempting to decrypt data using tools designed for different ransomware infections, users are likely to end up permanently damaging files and decryption will no longer be possible even with the correct tool).

Another way to identify a ransomware infection is to check the file extension, which is appended to each encrypted file. Ransomware infections are often named by the extensions they append (see files encrypted by Qewe ransomware below).

This method is only effective, however, when the appended extension is unique - many ransomware infections append a generic extension (for example, ".encrypted", ".enc", ".crypted", ".locked", etc.). In these cases, identifying ransomware by its appended extension becomes impossible.

One of the easiest and quickest ways to identify a ransomware infection is to use the ID Ransomware website. This service supports most existing ransomware infections. Victims simply upload a ransom message and/or one encrypted file (we advise you to upload both if possible).

The ransomware will be identified within seconds and you will be provided with various details, such as the name of the malware family to which the infection belongs, whether it is decryptable, and so on.

Example 1 (Qewe [Stop/Djvu] ransomware):

Example 2 (.iso [Phobos] ransomware):

If your data happens to be encrypted by ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, a ransom message title, file extension, provided contact emails, crypto wallet addresses, etc.).

Search for ransomware decryption tools:

Encryption algorithms used by most ransomware-type infections are extremely sophisticated and, if the encryption is performed properly, only the developer is capable of restoring data. This is because decryption requires a specific key, which is generated during the encryption. Restoring data without the key is impossible. In most cases, cybercriminals store keys on a remote server, rather than using the infected machine as a host. Dharma (CrySis), Phobos, and other families of high-end ransomware infections are virtually flawless, and thus restoring data encrypted without the developers' involvement is simply impossible. Despite this, there are dozens of ransomware-type infections that are poorly developed and contain a number of flaws (for example, the use of identical encryption/decryption keys for each victim, keys stored locally, etc.). Therefore, always check for available decryption tools for any ransomware that infiltrates your computer.

Finding the correct decryption tool on the internet can be very frustrating. For this reason, we recommend that you use the No More Ransom Project and this is where identifying the ransomware infection is useful. The No More Ransom Project website contains a "Decryption Tools" section with a search bar. Enter the name of the identified ransomware, and all available decryptors (if there are any) will be listed.

Restore files with data recovery tools:

Depending on the situation (quality of ransomware infection, type of encryption algorithm used, etc.), restoring data with certain third-party tools might be possible. Therefore, we advise you to use the Recuva tool developed by CCleaner. This tool supports over a thousand data types (graphics, video, audio, documents, etc.) and it is very intuitive (little knowledge is necessary to recover data). In addition, the recovery feature is completely free.

Step 1: Perform a scan.

Run the Recuva application and follow the wizard. You will be prompted with several windows allowing you to choose what file types to look for, which locations should be scanned, etc. All you need to do is select the options you're looking for and start the scan. We advise you to enable the "Deep Scan" before starting, otherwise, the application's scanning capabilities will be restricted.

Wait for Recuva to complete the scan. The scanning duration depends on the volume of files (both in quantity and size) that you are scanning (for example, several hundred gigabytes could take over an hour to scan). Therefore, be patient during the scanning process. We also advise against modifying or deleting existing files, since this might interfere with the scan. If you add additional data (for example, downloading files/content) while scanning, this will prolong the process:

Step 2: Recover data.

Once the process is complete, select the folders/files you wish to restore and simply click "Recover". Note that some free space on your storage drive is necessary to restore data:

Create data backups:

Proper file management and creating backups is essential for data security. Therefore, always be very careful and think ahead.

Partition management: We recommend that you store your data in multiple partitions and avoid storing important files within the partition that contains the entire operating system. If you fall into a situation whereby you cannot boot the system and are forced to format the disk on which the operating system is installed (in most cases, this is where malware infections hide), you will lose all data stored within that drive. This is the advantage of having multiple partitions: if you have the entire storage device assigned to a single partition, you will be forced to delete everything, however, creating multiple partitions and allocating the data properly allows you to prevent such problems. You can easily format a single partition without affecting the others - therefore, one will be cleaned and the others will remain untouched, and your data will be saved. Managing partitions is quite simple and you can find all the necessary information on Microsoft's documentation web page.

Data backups: One of the most reliable backup methods is to use an external storage device and keep it unplugged. Copy your data to an external hard drive, flash (thumb) drive, SSD, HDD, or any other storage device, unplug it and store it in a dry place away from the sun and extreme temperatures. This method is, however, quite inefficient, since data backups and updates need to be made regularly. You can also use a cloud service or remote server. Here, an internet connection is required and there is always the chance of a security breach, although it's a really rare occasion.

We recommend using Microsoft OneDrive for backing up your files. OneDrive lets you store your personal files and data in the cloud, sync files across computers and mobile devices, allowing you to access and edit your files from all of your Windows devices. OneDrive lets you save, share and preview files, access download history, move, delete, and rename files, as well as create new folders, and much more.

You can back up your most important folders and files on your PC (your Desktop, Documents, and Pictures folders). Some of OneDrive’s more notable features include file versioning, which keeps older versions of files for up to 30 days. OneDrive features a recycling bin in which all of your deleted files are stored for a limited time. Deleted files are not counted as part of the user’s allocation.

The service is built using HTML5 technologies and allows you to upload files up to 300 MB via drag and drop into the web browser or up to 10 GB via the OneDrive desktop application. With OneDrive, you can download entire folders as a single ZIP file with up to 10,000 files, although it can’t exceed 15 GB per single download.

OneDrive comes with 5 GB of free storage out of the box, with an additional 100 GB, 1 TB, and 6 TB storage options available for a subscription-based fee. You can get one of these storage plans by either purchasing additional storage separately or with Office 365 subscription.

Creating a data backup:

The backup process is the same for all file types and folders. Here’s how you can back up your files using Microsoft OneDrive

Step 1: Choose the files/folders you want to backup.

Click the OneDrive cloud icon to open the OneDrive menu. While in this menu, you can customize your file backup settings.

Click Help & Settings and then select Settings from the drop-down menu.

Go to the Backup tab and click Manage backup.

In this menu, you can choose to backup the Desktop and all of the files on it, and Documents and Pictures folders, again, with all of the files in them. Click Start backup.

Now, when you add a file or folder in the Desktop and Documents and Pictures folders, they will be automatically backed up on OneDrive.

To add folders and files, not in the locations shown above, you have to add them manually.

Open File Explorer and navigate to the location of the folder/file you want to backup. Select the item, right-click it, and click Copy.

Then, navigate to OneDrive, right-click anywhere in the window and click Paste. Alternatively, you can just drag and drop a file into OneDrive. OneDrive will automatically create a backup of the folder/file.

All of the files added to the OneDrive folder are backed up in the cloud automatically. The green circle with the checkmark in it indicates that the file is available both locally and on OneDrive and that the file version is the same on both. The blue cloud icon indicates that the file has not been synced and is available only on OneDrive. The sync icon indicates that the file is currently syncing.

To access files only located on OneDrive online, go to the Help & Settings drop-down menu and select View online.

Step 2: Restore corrupted files.

OneDrive makes sure that the files stay in sync, so the version of the file on the computer is the same version on the cloud. However, if ransomware has encrypted your files, you can take advantage of OneDrive’s Version history feature that will allow you to restore the file versions prior to encryption.

Microsoft 365 has a ransomware detection feature that notifies you when your OneDrive files have been attacked and guide you through the process of restoring your files. It must be noted, however, that if you don’t have a paid Microsoft 365 subscription, you only get one detection and file recovery for free.

If your OneDrive files get deleted, corrupted, or infected by malware, you can restore your entire OneDrive to a previous state. Here’s how you can restore your entire OneDrive:

1. If you're signed in with a personal account, click the Settings cog at the top of the page. Then, click Options and select Restore your OneDrive.

If you're signed in with a work or school account,  click the Settings cog at the top of the page. Then, click Restore your OneDrive.

2. On the Restore your OneDrive page, select a date from the drop-down list. Note that if you're restoring your files after automatic ransomware detection, a restore date will be selected for you.

3. After configuring all of the file restoration options, click Restore to undo all the activities you selected.

The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups.

Frequently Asked Questions (FAQ)

How was my computer hacked and how did hackers encrypt my files?

Typically, ransomware encrypts files after executing malicious drive-by downloads, files (attachments) downloaded from or through malicious emails, fake software cracking tools or installers for pirated software, or files downloaded from various unreliable sources.

How to open ".dewar" files?

Files encrypted by the Dewar ransomware cannot be opened. They have to be decrypted.

Where should I look for free decryption tools for Dewar ransomware?

In case of a ransomware attack you should check the No More Ransom project website (more information above).

I can pay you a lot of money, can you decrypt files for me?

We do not provide a decryption service. Third parties offering paid decryption should not be trusted. Typically, they are scammers who do not have any decryption tools or act as a man-in-the-middle. Unfortunately, it is rarely possible to decrypt files without tools purchased from the attackers.

Will Combo Cleaner help me remove Dewar ransomware?

Yes, Combo Cleaner will scan the operating system and remove ransomware. It is important to remove ransomware because it can cause more damage while present. Antivirus software cannot decrypt files. Thus, they remain encrypted even when ransomware is no longer present.

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