Log and Monitoring Solutions

Logging

Log monitoring is defined as the process of analyzing event logs generated by IT systems—encompassing all critical networks and devices—based on predefined rules. Log management, which involves comprehensive steps such as collecting, aggregating, preserving logs in their original form, text analysis, and presentation, enables the identification of attack indicators and digital evidence. Furthermore, it assists in forensic investigations by gathering critical information such as the channels and timing of an attack, the protocols utilized, and its point of origin. Logs must be monitored daily, and real-time alerts must be configured for high-risk events.

To achieve more efficient log management:

- Storing large volumes of log data with rapid search and fast access capabilities enhances overall efficiency.
- Early event detection enables swift response and mitigation to minimize the impact of an attack.
- Advanced event detection capabilities provide robust control mechanisms to investigate incidents and determine appropriate responses.
- Establishing alert and exception rules automates routines such as detecting breaches, intrusions, and unauthorized access; streaming data for analysis; and maintaining audit trails and tracking.

Log Monitoring

Beyond merely recording logs, monitoring and analyzing them is crucial for the full protection of information assets. Simply logging data is insufficient to detect attacks rapidly and respond effectively; logging must be accompanied by near-real-time monitoring and analysis.

Defining Requirements for Log Monitoring

- Identifying what needs to be monitored
- Determining which systems or system components should be included in the monitoring process
- Specifying what information systems must record in security logs
- Planning how security logs will be captured and analyzed
- Establishing how frequently security log data should be reviewed
- Determining how long log data must be retained

When defining these requirements, statutory regulations and security standards that the organization is obligated to comply with must be taken into account.

Preparations for Effective Log Monitoring

- Defining the tools and resources to be used for log management
- Establishing a centralized storage system for log collection
- Transferring logs to the centralized storage system
- Preparing logs for processing

Log Processing Phase

To effectively apply filtering mechanisms and efficiently process log data, logs collected from disparate sources in varying formats must be converted into a common format. This process is known as normalization.

Aggregation, on the other hand, reduces the volume of data to be analyzed and accelerates processing by consolidating multiple records of the same event into a single entry. Following normalization, the next step is applying correlation techniques, which establish meaningful connections between seemingly independent events using defined policies and rules, helping to detect potential attacks and trigger timely actions.

Effective Log Monitoring

- Collecting and analyzing log records
- Establishing a baseline
- Identifying patterns that provide insight into normal and abnormal traffic (e.g., classifying and generating statistics for Source IP/port and Destination IP/port data)
- Identifying activities that exceed average occurrence frequencies (e.g., defining frequency threshold values to distinguish between routine and anomalous activity)
- Configuring automated alerts to detect risks and potential attacks with the highest possible degree of accuracy
- Responding swiftly and effectively to alerts to mitigate suspicious activities before they escalate into full-scale attacks
- Verifying the validity of reported incidents (e.g., analyzing the environment where the event occurred upon receiving an alert to verify whether the suspicious activity involves genuinely anomalous or malicious behavior)
- Implementing measures to minimize risks and potential damage through rapid, coordinated incident response
- Documenting and analyzing details regarding the incident and the response strategies applied
- Reporting outcomes and findings

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