Server-Side Security Monitoring
Server-Side Security Monitoring
Backend systems must aggregate and analyze security events from mobile clients while monitoring their own security posture.
// Server-side security monitoring and analysis
class SecurityOperationsCenter {
// Event aggregation and correlation
class EventCorrelationEngine {
private let timeWindow = TimeInterval(300) // 5 minutes
func correlateEvents(_ events: [SecurityEvent]) -> [SecurityIncident] {
var incidents: [SecurityIncident] = []
// Group events by user and time window
let groupedEvents = groupEventsByUserAndTime(events)
for (key, userEvents) in groupedEvents {
// Detect patterns
if let bruteForce = detectBruteForcePattern(userEvents) {
incidents.append(bruteForce)
}
if let accountTakeover = detectAccountTakeoverPattern(userEvents) {
incidents.append(accountTakeover)
}
if let dataExfiltration = detectDataExfiltrationPattern(userEvents) {
incidents.append(dataExfiltration)
}
if let distributedAttack = detectDistributedAttackPattern(userEvents) {
incidents.append(distributedAttack)
}
}
return incidents
}
private func detectBruteForcePattern(_ events: [SecurityEvent]) -> SecurityIncident? {
let failedAuths = events.filter { $0.type == .authenticationFailure }
if failedAuths.count > 5 {
let sources = Set(failedAuths.compactMap { $0.details["ip_address"] })
return SecurityIncident(
type: .bruteForce,
severity: sources.count > 1 ? .critical : .high,
affectedUsers: Set(failedAuths.compactMap { $0.userId }),
evidence: failedAuths.map { $0.id },
detectedAt: Date(),
confidence: 0.95
)
}
return nil
}
private func detectAccountTakeoverPattern(_ events: [SecurityEvent]) -> SecurityIncident? {
// Look for suspicious login patterns
let loginEvents = events.filter { $0.type == .authenticationSuccess }
for event in loginEvents {
// Check for impossible travel
if let previousLocation = getPreviousLoginLocation(for: event.userId),
let currentLocation = event.location {
let distance = calculateDistance(from: previousLocation, to: currentLocation)
let timeDiff = event.timestamp.timeIntervalSince(previousLocation.timestamp)
let speed = distance / timeDiff
if speed > 1000 { // km/h - impossible travel speed
return SecurityIncident(
type: .accountTakeover,
severity: .critical,
affectedUsers: [event.userId],
evidence: [event.id],
detectedAt: Date(),
confidence: 0.9
)
}
}
// Check for device fingerprint change
if hasDeviceFingerprintChanged(for: event.userId,
fingerprint: event.deviceFingerprint) {
return SecurityIncident(
type: .suspiciousLogin,
severity: .high,
affectedUsers: [event.userId],
evidence: [event.id],
detectedAt: Date(),
confidence: 0.8
)
}
}
return nil
}
}
// Real-time alerting
class AlertingEngine {
private let alertChannels: [AlertChannel] = [
SlackAlertChannel(),
PagerDutyAlertChannel(),
EmailAlertChannel(),
SMSAlertChannel()
]
func processIncident(_ incident: SecurityIncident) {
let alert = createAlert(from: incident)
// Route based on severity
switch incident.severity {
case .critical:
// Immediate notification to all channels
alertChannels.forEach { channel in
channel.send(alert, priority: .immediate)
}
// Trigger incident response
IncidentResponseOrchestrator.shared.initiateResponse(incident)
case .high:
// Notify security team
alertChannels
.filter { $0.supportsHighPriority }
.forEach { $0.send(alert, priority: .high) }
case .medium:
// Queue for review
SecurityReviewQueue.shared.add(incident)
case .low:
// Log for analysis
SecurityAnalytics.log(incident)
}
}
private func createAlert(from incident: SecurityIncident) -> SecurityAlert {
return SecurityAlert(
id: UUID().uuidString,
title: generateAlertTitle(incident),
description: generateAlertDescription(incident),
severity: incident.severity,
affectedUsers: incident.affectedUsers.count,
evidence: incident.evidence,
recommendedActions: generateRecommendedActions(incident),
timestamp: Date()
)
}
}
// Automated response system
class IncidentResponseOrchestrator {
static let shared = IncidentResponseOrchestrator()
func initiateResponse(_ incident: SecurityIncident) {
// Create response plan
let responsePlan = createResponsePlan(for: incident)
// Execute immediate actions
executeImmediateActions(responsePlan.immediateActions)
// Schedule follow-up actions
scheduleFollowUpActions(responsePlan.followUpActions)
// Create incident ticket
let ticket = IncidentTicket(
incident: incident,
responsePlan: responsePlan,
assignedTo: determineAssignee(incident),
status: .inProgress
)
IncidentManagementSystem.createTicket(ticket)
}
private func createResponsePlan(for incident: SecurityIncident) -> ResponsePlan {
switch incident.type {
case .bruteForce:
return ResponsePlan(
immediateActions: [
.lockAffectedAccounts,
.blockSourceIPs,
.enforcePasswordReset
],
followUpActions: [
.reviewAuthenticationLogs,
.updateRateLimiting,
.notifyAffectedUsers
]
)
case .dataExfiltration:
return ResponsePlan(
immediateActions: [
.revokeAccessTokens,
.blockDataAccess,
.isolateAffectedSystems
],
followUpActions: [
.forensicAnalysis,
.dataBreachAssessment,
.regulatoryNotification
]
)
case .malwareDetected:
return ResponsePlan(
immediateActions: [
.quarantineDevice,
.revokeAllSessions,
.blockNetworkAccess
],
followUpActions: [
.malwareAnalysis,
.updateSecurityPolicies,
.deployPatches
]
)
default:
return ResponsePlan(
immediateActions: [.alertSecurityTeam],
followUpActions: [.investigate]
)
}
}
}
}