The gang is using a variety of tools and malware to carry out attacks in volume on critical sectors, the FBI warned.
https://threatpost.com/cuba-ransomware-gang-44m-payouts/176790/
Nvidia certificates are being used to sign malware, enabling malicious programs to pose as legitimate and slide past security safeguards on Windows machines.
https://threatpost.com/nvidias-stolen-code-signing-certs-sign-malware/178784/