Doppelpaymer is a ransomware family that encrypts user data and later on it asks for a ransom in order to restore original files. It is recognizable by its trademark file extension added to encrypted files: .doppeled. It also creates a note file named: ".how2decrypt.txt".
What are the typical indicators of a Grief (Doppelpaymer) ransomware attack?+
Defenders should pay attention to the .doppeled extension being added to encrypted files and the creation of a ransom note file named .how2decrypt.txt on the system.