Threat hunters have shed light on a “sophisticated and evolving malware toolkit” called Ragnar Loader that’s used by various cybercrime and ransomware groups like Ragnar Locker (aka Monstrous Mantis), FIN7, FIN8, and Ruthless Mantis (ex-REvil). “Ragnar Loader plays a key role in keeping access to compromised systems, helping attackers stay in networks for long-term operations,” Swiss cybersecurity company PRODAFT