312-85 Exam Dumps : Certified Threat Intelligence Analyst (CTIA)

Passive DNS monitoring involves collecting data about DNS queries and responses without actively querying DNS servers, thereby not altering or interfering with DNS traffic. This technique allows analysts to track changes in DNS records and observe patterns that may indicate malicious activity. In the scenario described, Enrique is employing passive DNS monitoring by using a recursive DNS server to log the responses received from name servers, storing these logs in a central database for analysis. This approach is effective for identifying malicious domains, mapping malware campaigns, and understanding threat actors' infrastructure without alerting them to the fact that they are being monitored. This method is distinct from active techniques such as DNS interrogation or zone transfers, which involve sending queries to DNS servers, and dynamic DNS, which refers to the automatic updating of DNS records.References:

• SANS Institute InfoSec Reading Room, "Using Passive DNS to Enhance Cyber Threat Intelligence"
• "Passive DNS Replication," by Florian Weimer, FIRST Conference Presentation

The Blueliv Threat Exchange Network is a collaborative platform designed for sharing and receiving threat intelligence among security professionals and organizations. It provides real-time information on global threats, helping participants to enhance their security posture by leveraging shared intelligence. The platform facilitates the exchange ofinformation related to cybersecurity threats, including indicators of compromise (IoCs), tactics, techniques, and procedures (TTPs) of threat actors, and other relevant data. This makes it an ideal choice for Kim, who is looking to gather and share threat information to develop security policies for his organization. In contrast, Cuckoo Sandbox is a malware analysis system, OmniPeek is a network analyzer, and PortDroid is a network analysis application, none of which are primarily designed for intelligence sharing.References:

• Blueliv's official documentation and resources
• "Building an Intelligence-Led Security Program," by Allan Liska

Sam's mistake was using threat intelligence from sources that he did not verify for reliability. Relying on intelligence from unverified or unreliable sources can lead to the incorporation of inaccurate, outdated, or irrelevant information into the organization's threat intelligence program. This can result in "noise," which refers to irrelevant or false information that can distract from real threats, and potentially put the organization's network at risk. Verifying the credibility and reliability of intelligence sources is crucial to ensure that the data used for making security decisions is accurate and actionable.References:

• "Best Practices for Threat Intelligence Sharing," by FIRST (Forum of Incident Response and Security Teams)
• "Evaluating Cyber Threat Intelligence Sources," by Jon DiMaggio, SANS Institute InfoSec Reading Room