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Threat intelligence is crucial for organizations to understand the threats they are currently facing. It involves collecting, evaluating, and disseminating information about current or potential attacks that could affect an organization. This intelligence can help organizations prioritize their security measures based on the likelihood and potential impact of different threats. By using threat intelligence, organizations can be more proactive in their defense strategies and respond more effectively to cyber threats.

References: The Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) course emphasizes the importance of threat intelligence in monitoring security incidents and responding to them

• A Distributed Denial of Service (DDoS) attack involves multiple compromised devices (botnet) sending a large number of requests to a target server to overwhelm it.
• In a specific type of DDoS attack known as an NTP amplification attack, the attacker exploits the Network Time Protocol (NTP) servers by sending small queries with a spoofed source IP address (the target’s IP).
• The NTP server responds with a much larger reply to the target’s IP address, thereby amplifying the traffic directed at the target.
• This reflection and amplification technique significantly increases the volume of traffic sent to the target, causing denial of service.

References

• OWASP DDoS Attack Overview
• NTP Amplification Attack Explained
• Understanding Botnets and Distributed Attacks

 Indicators of Compromise (IoC) are pieces of forensic data, such as system log entries or files, that suggest an intrusion may have occurred. Indicators of Attack (IoA) are signs that an attack may be underway, allowing organizations to take action before any potential breach occurs.

References: The CBROPS course materials cover the concepts of IoC and IoA, explaining how they are used in cybersecurity operations to detect and prevent security incidents.