Files with mole extension can be most often found as files which have been affected by the CryptoMix ransomware.
MOLE file extension - CryptoMix (variant) ransomware affected data
What is mole file? How to open mole files?
File type specification:
File extension mole is also used for one of the variant of CryptoMix ransomware. Much like other ransomware, it encrypts users files and demands bitcoins in exchange for the decryption.
The notes are left in the INSTRUCTION_FOR_HELPING_FILE_RECOVERY.TXT file.