Root Cause Analysis
The Root Cause Analysis (RCA) is an essential step in the eradication phase. It helps the organization understand how the threat initially gained access to the network, what vulnerabilities were exploited, and why the incident occurred in the first place.
Key activities during root cause analysis include:
Reviewing Logs and Historical Data: The IRT should conduct an in-depth review of system logs, intrusion detection system (IDS) alerts, and any other available historical data to trace the attacker’s actions. By understanding how the attack unfolded, the team can determine the original point of entry.
Identifying Vulnerabilities and Weaknesses: The root cause may stem from specific vulnerabilities in the system, such as unpatched software, misconfigured settings, or inadequate network segmentation. Identifying these vulnerabilities is essential to preventing similar incidents in the future.
Forensic Analysis: Digital forensics is crucial in identifying the methods used by the attacker, including the tools and techniques employed. This analysis may involve tracking malware signatures, network traffic patterns, and payload delivery methods.
Collaborating with External Experts: In some cases, external cybersecurity experts or incident response vendors may be needed to conduct a deeper forensic investigation and provide insights into the attacker’s tactics and objectives.
By identifying the root cause, the organization can address the specific vulnerabilities or weaknesses that allowed the attack to occur, reducing the likelihood of future breaches.