ProLock demands ransoms ranging between $175,000 to over $660,000 depending on the size of the network. The most recent victim is Diebold Nixdorf, mostly known for providing automated teller machines (ATMs) The skills and techniques seen with ProLock operators are similar to those of high-profile ransomware groups such as Sodinokibi and Maze. ProLock relies on two main vectors: distribution via QakBot and access via public-facing remote desktop (RDP) servers.
Source: https://www.bleepingcomputer.com/news/security/prolock-ransomware-teams-up-with-qakbot-trojan-for-network-access/