Amidst increasing phishing attempts, your team needs to ascertain the trustworthiness of certain network identifiers that are potentially linked to these attacks. How can you evaluate if these identifiers have been flagged for malicious activities previously?
Execute a traceroute to each network identifier to trace the path and determine the origin of network traffic
Consult a well-recognized IP reputation database for records of flagged activities associated with the network identifiers
Use a WHOIS lookup service to obtain registration and contact information for the network identifiers
Analyze internal security logs to find previous internal access attempts by these network identifiers