The Chief Information Security Officer (CISO) asks a security analyst to write a new SIEM search rule to determine if any credit card numbers are being written to log files. The CISO and security analyst suspect the following log snippet contains real customer card data:
Which of the following expressions would find potential credit card numbers in a format that matches the log snippet?
A. ^0-9$
B. (0-9) x 16
C. “1234-5678”
D. “04*”