OCTOPUS: Security Framework Design Study

def scan_system(self) -> List[ThreatEvent]:
    """
    Scan system for threats.

    Returns:
        List of detected threat events

    Example:
        >>> detector = ThreatDetector()
        >>> threats = detector.scan_system()
        >>> print(f"Detected {len(threats)} threats")
    """
    self.detection_count += 1
    self.last_scan_time = datetime.now().isoformat()

    threats = []

    # Detect suspicious processes
    threats.extend(self._detect_suspicious_processes())

    # Detect suspicious network connections
    threats.extend(self._detect_suspicious_connections())

    # Update threat count
    self.threat_count += len(threats)

    return threats

def _detect_suspicious_processes(self) -> List[ThreatEvent]:
    """
    Detect suspicious processes.

    Returns:
        List of threat events for suspicious processes
    """
    threats = []

    if not HAS_PSUTIL:
        # Fallback: basic detection without psutil
        return threats

    try:
        for proc in psutil.process_iter(['pid', 'name', 'username', 'cmdline']):
            try:
                proc_name = proc.info['name'].lower()

                # Check for suspicious process names
                for suspicious_name in self.SUSPICIOUS_PROCESS_NAMES:
                    if suspicious_name in proc_name:
                        threat = ThreatEvent(
                            threat_type='suspicious_process',
                            severity=self._get_process_severity(suspicious_name),
                            confidence=0.7,
                            details=f"Suspicious process detected: {proc.info['name']} (PID: {proc.info['pid']})",
                            source=f"process:{proc.info['pid']}"
                        )
                        threats.append(threat)
                        break

                # Check for processes running as root with suspicious characteristics
// ... (truncated)

def handle_event(self, event: ResponseEvent) -> List[ResponseResult]:
    """
    Handle security event with automated response.

    Args:
        event: Security event to process

    Returns:
        List of response results

    Example:
        >>> engine = ResponseEngine()
        >>> event = ResponseEvent(
        ...     event_id="evt-123",
        ...     threat_type="suspicious_process",
        ...     severity="high",
        ...     confidence=0.9
        ... )
        >>> results = engine.handle_event(event)
    """
    self.event_count += 1
    self.last_event_time = datetime.now().isoformat()

    # Validate event
    if not self._validate_event(event):
        return [ResponseResult(
            action='validation',
            success=False,
            message="Event validation failed",
            event_id=event.event_id
        )]

    # Determine actions based on severity and confidence
    actions = self._select_actions(event)

    # Execute actions
    results = []
    for action in actions:
        result = self._execute_action(action, event)
        results.append(result)

        if result.success:
            self.success_count += 1

    return results

def _select_actions(self, event: ResponseEvent) -> List[str]:
    """
    Select actions based on event severity and confidence.

    Args:
        event: Event to process

    Returns:
        List of action names to execute
    """
    actions = []
    severity_level = self.SEVERITY_LEVELS.get(event.severity, 0)

    # Always alert
    if self.enabled_actions.get('alert', True):
        actions.append('alert')

    # Escalation based on severity
    if severity_level >= 2 and event.confidence >= 0.7:
        # Medium severity - isolate if enabled
        if self.enabled_actions.get('isolate_process', False):
            actions.append('isolate_process')

    if severity_level >= 3 and event.confidence >= 0.8:
// ... (truncated)