One example of the 777 variant.

Image Source: PCrisk

777 targets Windows OS and currently, the method of distribution is unknown. Very little is known about this variant as of yet but early reports state that it appends .777 to the encrypted file extensions, does not delete Shadow Volume Copies, and demands a ransom of $1500 USD. As more is discovered about 777, it will be added to this entry.

  • Bleeping Computer provides more information about 777 here.
  • Emsisoft offers a decryption tool for files encrypted by 777 here