Our Network forensics methodology involves the following steps:

1. Define Objectives: Clearly establish the goals of the network forensics investigation. This could include identifying the scope of the investigation, determining the specific issues to be addressed, and understanding any legal or regulatory requirements.
2. Collect Evidence: Gather all relevant network and system logs, traffic captures, configuration files, and any other potential sources of evidence. This may involve capturing packets on the network, analyzing log files, and extracting relevant data from network devices and servers.
3. Preserve Evidence: Ensure the integrity of the collected evidence by creating forensically sound copies and preserving the original data. This includes making duplicates of hard drives, creating hashes of files to verify their integrity, and storing the evidence in a secure and tamper-proof manner.
4. Analyze Evidence: The collected evidence is then analyzed to identify any suspicious or malicious activities, unauthorized access, data breaches, or any other network security incidents. This may involve examining network traffic patterns, analyzing system logs, and reconstructing events to determine the sequence of actions.
5. Identify the Attack Vector: Determine how the network was compromised or the unauthorized access occurred. This may involve identifying vulnerabilities in the network infrastructure, analyzing malware or other malicious code, or investigating phishing or social engineering attacks.
6. Determine Impact: Evaluate the extent of the impact of the incident, including any potential data breaches, systems compromised, or sensitive information accessed. This step may involve assessing the damage caused, estimating the potential costs and risks associated with the incident, and identifying any potential legal, financial, or reputational consequences.
7. Mitigate and Remediate: Develop and implement a plan to mitigate the impact of the incident and remediate any vulnerabilities or weaknesses in the network infrastructure. This may include patching vulnerabilities, updating security controls, implementing new security measures, and ensuring that necessary precautions are taken to prevent future incidents.
8. Document Findings: Record all findings, analysis, and conclusions from the investigation in a clear and concise manner. This includes documenting the steps taken, the evidence collected, the analysis conducted, and the findings and recommendations. This documentation will serve as a comprehensive report that can be used for legal purposes, internal reviews, or future reference.
9. Report and Communicate: Present the findings and recommendations to the relevant stakeholders. This may involve communicating with management, IT teams, legal departments, and any other parties involved in the investigation. The report should provide a clear overview of the incident, the impact, and the recommended actions to prevent future incidents.
10. Continuous Monitoring: Implement measures for ongoing network monitoring and detection to identify and respond to any future network security incidents. This may involve implementing intrusion detection systems (IDS), log monitoring tools, threat intelligence feeds, and conducting regular security assessments to identify and address potential vulnerabilities.

Overall, our network forensics methodology aims to systematically investigate and analyze network security incidents, identify the root causes of the incidents, mitigate the impact, and develop measures to prevent future incidents.