How to remove Dharma-MERS Ransomware and decrypt .MERS files

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What is Dharma-MERS Ransomware

Dharma-MERS Ransomware is another iteration of extremely dangerous Crysis-Dharma-Cezar ransomware family, that, in this case, adds .MERS extension to the end of the files it encrypts. Virus, actually, composes suffix using several parts: e-mail address, unique 8-digit identification number (randomly generated) and .MERS extension. So, finally, encoded files will receive following complex suffix – .id-{8-digit-id}.[{email-address}].MERS. For example, here is the example of extension, that was used on real computers of some of the victims in USA:

  • .id-{id}.[crypt1style@aol.com].MERS

After successful encryption, malware creates text file (ransom note): RETURN FILES.txt and in the folders with encrypted files and on the desktop. The text from ransomware window is below. RETURN FILES.txt is the short text file, that encourages users to contact the hackers with such message:

Dharma-MERS RansomwareRETURN FILES.txt
All FILES ENCRYPTED "RSA1024"
All YOUR FILES HAVE BEEN ENCRYPTED!!! IF YOU WANT TO RESTORE THEM, WRITE US TO THE E-MAIL crypt1style@aol.com
IN THE LETTER WRITE YOUR ID, YOUR ID 1E857D00
IF YOU ARE NOT ANSWERED, WRITE TO EMAIL:crypt1style@keemail.me
YOUR SECRET KEY WILL BE STORED ON A SERVER 7 DAYS, AFTER 7 DAYS IT MAY BE OVERWRITTEN BY OTHER KEYS, DON'T PULL TIME, WAITING YOUR EMAIL
FREE DECRYPTION FOR PROOF
You can send us up to 1 file for free decryption. The total size of files must be less than 1Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.)
DECRYPTION PROCESS:
When you make sure of decryption possibility transfer the money to our bitcoin wallet. As soon as we receive the money we will send you:
1. Decryption program.
2. Detailed instruction for decryption.
3. And individual keys for decrypting your files.
!WARNING!
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.

All your data is encrypted!
for return write to mail:
crypt1style@aol.com or crypt1style@keemail.me

As a rule, Dharma-type Ransomware extorts from $500 to $1500 ransom, that can be paid in Monero, Dash or BTC (BitCoins), and in return they promise to send decryption key. Using cryptocurrency makes it impossible to track the payee. We do not recommend to pay any money to malefactors. Usually, after some period of time security specialists from antivirus companies or individual researchers break the algorithms and release decryption keys. Mention, that some files can be restored by using backups, shadow copies, previous versions of files or file-recovery software. Follow the guide below to remove Dharma-MERS Ransomware and decrypt .MERS files in Windows 10, 8, 7 effortlessly.

Dharma-MERS Ransomware

How Dharma-MERS Ransomware infected your PC

Dharma-MERS Ransomware uses spam mailing with malicious .docx attachments. Such attachments have malicious macros, that runs when user opens the file. This macros downloads executable from the remote server, that, in its turn, starts encryption process. Virus can also use Remote Desktop services to infiltrate victim’s PCs. It is important to know, that this ransomware can encrypt mapped network drives, shared virtual machine host drives, and unmapped network shares. It is necessary to control access to network shares. After encryption, the shadow copies of the files are deleted by the command:

vssadmin.exe vssadmin delete shadows /all /quiet

Virus assigns certain ID with the victims, that is used to name those files and supposedly to send decryption key. In order to prevent infection with this type of threats in future we recommend you to use WiperSoft AntiSpyware and BitDefender Anti-Ransomware.

Download Dharma-MERS Ransomware Removal Tool

Download Removal Tool

To remove Dharma-MERS Ransomware completely, we recommend you to use WiperSoft AntiSpyware from WiperSoft. It detects and removes all files, folders and registry keys of Dharma-MERS Ransomware.

How to remove Dharma-MERS Ransomware manually

It is not recommended to remove Dharma-MERS Ransomware manually, for safer solution use Removal Tools instead.

Dharma-MERS Ransomware files:

Info.hta
{randomfilename}.exe
FILES ENCRYPTED.txt
chrome64b.exe

Dharma-MERS Ransomware registry keys:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "filename.exe" = %UserProfile%\AppData\Roaming\{randomfilename}.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "filename.exe" = %UserProfile%\AppData\Roaming\{randomfilename}.exe

How to decrypt and restore .MERS files

Use automated decryptors

kaspersky dharma ransomware decryptor

Use following tool from Kaspersky called Rakhni Decryptor, that can decrypt .MERS files. Download it here:

Download Kaspersky RakhniDecryptor

There is no purpose to pay the ransom, because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

If you are infected with Dharma-MERS Ransomware and removed it from your computer you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Phoenix Data Recovery Pro to restore .MERS files

  1. Download Stellar Phoenix Data Recovery Pro.
  2. Select location to scan for lost files and click Scan button.
  3. Wait until Quick and Deep scans finish.
  4. Preview found files and restore them.

Using Windows Previous Versions option:

  1. Right-click on infected file and choose Properties.
  2. Select Previous Versions tab.
  3. Choose particular version of the file and click Copy.
  4. To restore the selected file and replace the existing one, click on the Restore button.
  5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

  1. Download Shadow Explorer program.
  2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
  3. Select the drive and date that you want to restore from.
  4. Right-click on a folder name and select Export.
  5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

  1. Login to the DropBox website and go to the folder that contains encrypted files.
  2. Right-click on the encrypted file and select Previous Versions.
  3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses like Dharma-MERS Ransomware in future

1. Get special anti-ransomware software

Use Bitdefender Anti-Ransomware

bitdefender anti-ransomware

Famous antivirus vendor BitDefender released free tool, that will help you with active anti-ransomware protection, as additional shield to your current protection. It will not conflict with bigger security applications. If you are searching complete internet security solution consider upgrading to full version of BitDefender Internet Security 2018.

Download BitDefender Anti-Ransomware

2. Back up your files

onedrive backup

Regardless of success of protection against ransomware threats, you can save your files using simple online backup. Cloud services are quite fast and cheap nowadays. There is more sense using online backup, than creating physical drives, that can get infected and encrypted when connected to PC or get damaged from dropping or hitting. Windows 10 and 8/8.1 users can find pre-installed OneDrive backup solution from Microsoft. It is actually one of the best backup services on the market, and has reasonable pricing plans. Users of earlier versions can get acquainted with it here. Make sure to backup and sync most important files and folders in OneDrive.

3. Do not open spam e-mails and protect your mailbox

spamfighter

Malicious attachments to spam or phishing e-mails is most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is SpamFighter. It works with various desktop applications, and provides very high level of anti-spam protection.

Download SPAMFighter 5/5 (4)

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