MRCR or Merry X-Mas is a ransomware family that first appeared in December last year. It is written in Delphi and uses a custom encryption algorithm. Encrypted files will have either ".PEGS1", ".MRCR1", ".RARE1", ".MERRY", or ".RMCM1" as an extension. The ransom note is named "YOUR_FILES_ARE_DEAD.HTA" and asks victims to contact either "firstname.lastname@example.org" or "comodosecurity" via the secure mobile messenger Telegram.
To start the decryption process you will need a file pair consisting of an encrypted file and the non-encrypted version of the same file. The files need to be between 64 KB and 100 MB in size. Select both and drag and drop them onto the decrypter executable to start the process.