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?
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
Execute a traceroute to each network identifier to trace the path and determine the origin of network traffic
Analyze internal security logs to find previous internal access attempts by these network identifiers
Utilizing a recognized IP reputation database is an efficient method to review if a network identifier has a history of being associated with nefarious activities, providing a trustworthiness score based on previous incidents. Reviewing internal logs could highlight past interactions with these network identifiers but would not offer information on their external reputation. While a WHOIS lookup could reveal registration details for these network identifiers, this would not typically encompass reputation data. Running traceroute allows tracking the route packets take to reach a network address but offers no insight into the address's reputation or history of malicious use.
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