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@Service
@Slf4j
public class IntelligentAlertingSystem {
private final AlertEngine alertEngine;
private final AlertRepository alertRepository;
private final NotificationService notificationService;
private final AlertCorrelationEngine correlationEngine;
private final List<AlertRule> alertRules = List.of(
AlertRule.builder()
.id("brute-force-detection")
.name("暴力破解检测")
.condition("failed_login_attempts > 5 && time_window < 300")
.severity(AlertSeverity.HIGH)
.actions(List.of("block_ip", "notify_security_team", "require_mfa"))
.build(),
AlertRule.builder()
.id("data-exfiltration")
.name("数据外泄检测")
.condition("large_data_download && unusual_location && after_hours")
.severity(AlertSeverity.CRITICAL)
.actions(List.of("block_user", "notify_ciso", "initiate_incident_response"))
.build(),
AlertRule.builder()
.id("privilege-escalation")
.name("权限提升检测")
.condition("user_role_changed && unusual_pattern && high_privilege")
.severity(AlertSeverity.CRITICAL)
.actions(List.of("revoke_access", "security_audit", "legal_notification"))
.build(),
AlertRule.builder()
.id("anomaly-detection")
.name("异常行为检测")
.condition("behavior_deviation_score > 0.8")
.severity(AlertSeverity.MEDIUM)
.actions(List.of("additional_verification", "user_notification"))
.build()
);
@Async
public void processSecurityEvent(SecurityEvent event) {
log.info("处理安全事件: {}", event.getType());
List<SecurityEvent> correlatedEvents =
correlationEngine.findCorrelatedEvents(event);
double riskScore = calculateRiskScore(event, correlatedEvents);
List<Alert> triggeredAlerts = evaluateAlertRules(event, correlatedEvents, riskScore);
for (Alert alert : triggeredAlerts) {
createAlert(alert);
}
executeAutomatedResponses(triggeredAlerts);
}
private List<Alert> evaluateAlertRules(SecurityEvent event,
List<SecurityEvent> correlatedEvents,
double riskScore) {
List<Alert> alerts = new ArrayList<>();
for (AlertRule rule : alertRules) {
if (evaluateCondition(rule.getCondition(), event, correlatedEvents, riskScore)) {
Alert alert = Alert.builder()
.ruleId(rule.getId())
.severity(rule.getSeverity())
.title(rule.getName())
.description(generateAlertDescription(rule, event))
.triggeredAt(Instant.now())
.status(AlertStatus.ACTIVE)
.build();
alerts.add(alert);
}
}
return alerts;
}
private boolean evaluateCondition(String condition, SecurityEvent event,
List<SecurityEvent> correlatedEvents, double riskScore) {
return ruleEngine.evaluate(condition, Map.of(
"event", event,
"correlatedEvents", correlatedEvents,
"riskScore", riskScore
));
}
private void createAlert(Alert alert) {
alertRepository.save(alert);
log.warn("生成安全告警: {} - {}", alert.getSeverity(), alert.getTitle());
notificationService.sendAlertNotification(alert);
}
private void executeAutomatedResponses(List<Alert> alerts) {
for (Alert alert : alerts) {
AlertRule rule = findRuleById(alert.getRuleId());
for (String action : rule.getActions()) {
executeAction(action, alert);
}
}
}
private void executeAction(String action, Alert alert) {
switch (action) {
case "block_ip":
firewallService.blockIp(alert.getEvent().getSourceIp());
break;
case "block_user":
userService.blockUser(alert.getEvent().getUserId());
break;
case "require_mfa":
userService.requireMfa(alert.getEvent().getUserId());
break;
case "notify_security_team":
notificationService.notifySecurityTeam(alert);
break;
case "notify_ciso":
notificationService.notifyCiso(alert);
break;
case "initiate_incident_response":
incidentResponseService.initiateResponse(alert);
break;
}
}
@Scheduled(fixedRate = 300000)
public void escalateAlerts() {
List<Alert> activeAlerts = alertRepository.findActiveAlerts();
for (Alert alert : activeAlerts) {
if (shouldEscalate(alert)) {
escalateAlert(alert);
}
}
}
private boolean shouldEscalate(Alert alert) {
Duration age = Duration.between(alert.getTriggeredAt(), Instant.now());
return switch (alert.getSeverity()) {
case LOW -> age.toHours() > 24;
case MEDIUM -> age.toHours() > 12;
case HIGH -> age.toHours() > 6;
case CRITICAL -> age.toMinutes() > 30;
};
}
private void escalateAlert(Alert alert) {
alert.setSeverity(alert.getSeverity().escalate());
alertRepository.save(alert);
log.error("告警升级: {} -> {}", alert.getId(), alert.getSeverity());
notificationService.sendEscalationNotification(alert);
}
}
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