Which of the following would BEST prevent this attack from reoccurring?

A recently discovered zero-day exploit utilizes an unknown vulnerability in the SMB network protocol to rapidly infect computers. Once infected, computers are encrypted and held for ransom .

Which of the following would BEST prevent this attack from reoccurring?
A . Configure the perimeter firewall to deny inbound external connections to SMB ports.
B . Ensure endpoint detection and response systems are alerting on suspicious SMB connections.
C . Deny unauthenticated users access to shared network folders.
D . Verify computers are set to install monthly operating system, updates automatically.

View Answer

Answer: A