Create or ingest telemetry
Collect per-session or per-user features such as events per minute, failed logins and bytes transferred and validate types and missing values.
Detect anomalous user behaviour. Prioritise analyst review.
User behaviour analytics (UBA) uses telemetry such as event rates, authentication failures and data transfer volumes to surface accounts or sessions that merit analyst attention. Important issues include biased synthetic data, tuning false positive rates for analyst workload, and integrating alerts with audit and escalation workflows.
Learning concept · Not a validated service
User behaviour analytics (UBA) uses telemetry such as event rates, authentication failures and data transfer volumes to surface accounts or sessions that merit analyst attention. Important issues include biased synthetic data, tuning false positive rates for analyst workload, and integrating alerts with audit and escalation workflows.
A proposed application: surface likely risky sessions to security analysts so they can triage unusual activity; a human reviewer must remain in charge and this prototype is not for making real enforcement decisions.
Collect per-session or per-user features such as events per minute, failed logins and bytes transferred and validate types and missing values.
Fit an unsupervised detector (the starter uses IsolationForest) and tune the contamination threshold to manage analyst workload.
Manually review flagged sessions, check feature distributions and false positives caused by legitimate spikes or scheduled jobs.
Expose alerts via an API or dashboard with audit logging, confidence scores and analyst feedback to allow retraining.
The supplied starter creates two synthetic numeric groups (300 'normal' rows and 15 'suspicious' rows), concatenates them into a DataFrame, fits an IsolationForest and prints rows flagged as anomalies.
suspicious = pd.DataFrame(
{
"events_per_minute": rng.normal(80, 10, 15),
"failed_attempts": rng.poisson(12, 15),
"bytes_out_mb": rng.normal(180, 30, 15),
}
)
logs = pd.concat([normal, suspicious], ignore_index=True)
detector = IsolationForest(contamination=0.05, random_state=42)
logs["anomaly_score"] = detector.fit_predict(logs)
alerts = logs[logs["anomaly_score"] == -1]The starter uses synthetic numeric rows rather than real security logs, fits only an unsupervised IsolationForest, and provides no dashboard, API, labelled supervised detector, evaluation metrics (precision/recall), or integration with alerting/audit trails.
Proposed extension: replace synthetic data with real telemetry (auth logs, process events, network flows), add labelled incidents to combine supervised classification with anomaly scores, and build a dashboard that shows alert context and allows analyst feedback.
This is a potential application pathway, not a delivered product. The supplied starter does not implement this service or validate it with real users.
Networkers Home runs this topic inside its Cybersecurity Course, with placement support and hands-on labs.