WastedLocker is a new ransomware operated by a malware exploitation gang commonly known as the Evil Corp gang. The same gang that is associated with Dridex and BitPaymer.
The attribution is not based on the malware variants as WastedLocker is very different from BitPaymer. What was kept was the ability to add specific modules for different targets.
The attacks performed using WastedLocker are highly targeted at very specific organizations. It is suspected that during a first penetration attempt an assessment of active defenses is made and the next attempt will be specifically designed to circumvent the active security software and other perimeter protection.