Double extortion is a technique increasingly employed by ransomware attackers. Double encryption is a tactic where malicious actors are encrypting victims data with two (or more) ransomware strains. Multiple payloads require victims to pay for multiple decryption utilities, thus increasing the overall cost of a ransomware attack. Emsisoft first warned about the threat of double encryption in mid-May. Organizations should be aware of double extortion and double encryption as attackers double down as attackers use two of something to reshape the flow of a ransom attack.”]
Source: https://securityintelligence.com/articles/double-encryption-extortion-ransomware-recovery/