While law enforcement and security researchers have made progress against some ransomware groups, Europol and other law enforcement officials say the threat will remain for some time.
President Biden told Russian President Putin in a phone call tha the U.S. will take "any necessary action" to defend its infrastructure from ransomware and other attacks.
The Fancy Bear attack group has been running a long-term brute-force campaign against Office 365 and Exchange servers in U.S. organizations, the NSA said.
Even when NSA discloses zero days to vendors, some of them don't respond quickly and issue fixes.
The FBI and international law enforcement agencies have disrupted Slilpp, allegedly the largest online marketplace for stolen credentials.