WIA-SEC-017 Security Audit Simulator 📋

// Blockchain-inspired immutable audit chain
function createAuditChain(logEntry, previousHash) {
  const timestamp = Date.now();
  const data = JSON.stringify({
    ...logEntry,
    timestamp,
    previous_hash: previousHash
  });

  // SHA-256 hash
  const currentHash = sha256(data);

  // RSA signature
  const signature = rsaSign(currentHash, privateKey);

  return {
    data: logEntry,
    timestamp,
    previous_hash: previousHash,
    current_hash: currentHash,
    signature,
    block_number: getNextBlockNumber()
  };
}

// Verify chain integrity
function verifyAuditChain(chain) {
  for (let i = 1; i < chain.length; i++) {
    const current = chain[i];
    const previous = chain[i - 1];

    // Verify hash linkage
    if (current.previous_hash !== previous.current_hash) {
      return { valid: false, error: `Chain broken at block ${i}` };
    }

    // Verify signature
    if (!rsaVerify(current.current_hash, current.signature, publicKey)) {
      return { valid: false, error: `Invalid signature at block ${i}` };
    }
  }

  return { valid: true, blocks: chain.length };
}

// ML-based anomaly detection for audit logs
function detectAnomalies(auditLogs, userProfile) {
  const features = extractFeatures(auditLogs);

  // Statistical analysis
  const stats = {
    avgLoginTime: calculateAverage(features.loginTimes),
    stdDeviation: calculateStdDev(features.loginTimes),
    commonLocations: findCommonLocations(features.locations),
    typicalResources: findTypicalResources(features.resources)
  };

  // Anomaly scoring (0-100)
  let anomalyScore = 0;

  // Check time-based anomalies
  if (isUnusualTime(features.currentLoginTime, stats.avgLoginTime)) {
    anomalyScore += 25;
  }

  // Check location-based anomalies
  if (!stats.commonLocations.includes(features.currentLocation)) {
    anomalyScore += 30;
  }

  // Check access pattern anomalies
  if (isUnusualAccessPattern(features.accessPattern, stats.typicalResources)) {
    anomalyScore += 45;
  }

  return {
    score: anomalyScore,
    level: anomalyScore > 70 ? 'CRITICAL' :
           anomalyScore > 50 ? 'HIGH' :
           anomalyScore > 30 ? 'MEDIUM' : 'LOW',
    details: generateAnomalyReport(features, stats)
  };
}

// Secure audit log transmission protocol
POST /api/v1/audit/submit
Content-Type: application/json
X-Audit-Signature: RSA-SHA256:abc123...
X-Audit-Timestamp: 2025-12-25T10:30:45.123Z
X-Audit-Nonce: 8f7e6d5c4b3a2910

{
  "protocol_version": "1.0",
  "audit_batch": [
    {
      "audit_id": "AUD-2025-12345678",
      "event_type": "DATA_ACCESS",
      "severity": "MEDIUM",
      "actor": {...},
      "resource": {...},
      "action": {...}
    }
  ],
  "batch_metadata": {
    "total_events": 1,
    "batch_hash": "sha256:f8e7d6c5...",
    "retention_policy": "SOC2_7_YEARS"
  }
}

// Response
HTTP/1.1 201 Created
Content-Type: application/json
X-Audit-Receipt: RCPT-2025-98765432

{
  "status": "ACCEPTED",
  "receipt_id": "RCPT-2025-98765432",
  "timestamp": "2025-12-25T10:30:45.456Z",
  "stored_count": 1,
  "compliance_verification": {
    "soc2": true,
    "iso27001": true,
    "gdpr": true
  },
  "retention_expires": "2032-12-25T10:30:45.456Z"
}

// WebSocket-based real-time audit streaming
const auditStream = new WebSocket('wss://audit.example.com/stream');

// Subscribe to specific event types
auditStream.send(JSON.stringify({
  action: 'subscribe',
  filters: {
    severity: ['HIGH', 'CRITICAL'],
    event_types: ['PRIVILEGE_ESCALATION', 'DATA_BREACH'],
    compliance_tags: ['SOC2', 'GDPR']
  },
  authentication: {
    token: 'Bearer eyJhbGc...',
    signature: 'RSA:3f8d9a...'
  }
}));

// Receive real-time audit events
auditStream.onmessage = (event) => {
  const auditEvent = JSON.parse(event.data);

  if (auditEvent.severity === 'CRITICAL') {
    triggerIncidentResponse(auditEvent);
  }

  logToComplianceDatabase(auditEvent);
  updateDashboard(auditEvent);
};

// Integration with Splunk, ELK Stack, QRadar
import { AuditClient } from '@wia/sec-017-audit';

const auditClient = new AuditClient({
  endpoint: 'https://audit.example.com',
  apiKey: process.env.WIA_AUDIT_KEY,
  compliance: ['SOC2', 'ISO27001', 'GDPR']
});

// Forward to SIEM
auditClient.on('audit_event', async (event) => {
  // Send to Splunk
  await splunk.log({
    source: 'wia-sec-017',
    sourcetype: 'security_audit',
    event: event
  });

  // Send to Elasticsearch
  await elasticsearch.index({
    index: 'security-audit',
    body: event
  });

  // Send to QRadar
  await qradar.sendEvent({
    severity: mapSeverity(event.severity),
    category: 'Security Audit',
    payload: event
  });
});

// AWS CloudTrail Integration
const AWS = require('aws-sdk');
const cloudtrail = new AWS.CloudTrail();

async function syncWithCloudTrail(auditEvent) {
  // Map WIA audit to AWS CloudTrail format
  const cloudTrailEvent = {
    eventVersion: '1.08',
    userIdentity: {
      type: 'IAMUser',
      principalId: auditEvent.actor.user_id,
      arn: `arn:aws:iam::123456789012:user/${auditEvent.actor.user_id}`
    },
    eventTime: auditEvent.timestamp,
    eventSource: 'wia-sec-017.amazonaws.com',
    eventName: auditEvent.event_type,
    sourceIPAddress: auditEvent.actor.ip_address,
    userAgent: auditEvent.actor.user_agent
  };

  await cloudtrail.putEvents({
    CloudTrailEvent: JSON.stringify(cloudTrailEvent)
  }).promise();
}

// Azure Monitor Integration
const { DefaultAzureCredential } = require('@azure/identity');
const { MonitorClient } = require('@azure/arm-monitor');

async function syncWithAzureMonitor(auditEvent) {
  const credential = new DefaultAzureCredential();
  const client = new MonitorClient(credential, subscriptionId);

  await client.activityLogs.create({
    resourceGroupName: 'security-audit',
    activityLogName: auditEvent.audit_id,
    properties: {
      eventTimestamp: auditEvent.timestamp,
      category: 'Security',
      level: mapToAzureLevel(auditEvent.severity),
      operationName: auditEvent.event_type,
      properties: auditEvent
    }
  });
}

{
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://wia.org/sec-017/v1"
  ],
  "type": ["VerifiableCredential", "AuditReceipt"],
  "issuer": {
    "id": "did:wia:audit-system-01",
    "name": "WIA Security Audit System"
  },
  "issuanceDate": "2025-12-25T10:30:45Z",
  "credentialSubject": {
    "id": "did:wia:user:admin@company.com",
    "auditRecord": {
      "audit_id": "AUD-2025-12345678",
      "event_type": "DATA_ACCESS",
      "resource": "/api/v1/customer-data",
      "timestamp": "2025-12-25T10:30:45.123Z",
      "compliance_verified": ["SOC2", "ISO27001", "GDPR"]
    }
  },
  "proof": {
    "type": "RsaSignature2018",
    "created": "2025-12-25T10:30:45Z",
    "verificationMethod": "did:wia:audit-system-01#keys-1",
    "proofPurpose": "assertionMethod",
    "jws": "eyJhbGciOiJSUzI1NiIsImI2NCI6ZmFsc2UsImNyaXQiOlsiYjY0Il19.."
  }
}

// Generate compliance certificate as VC
async function generateComplianceCertificate(auditPeriod) {
  const vc = {
    "@context": ["https://www.w3.org/2018/credentials/v1"],
    "type": ["VerifiableCredential", "ComplianceCertificate"],
    "issuer": "did:wia:compliance-authority",
    "issuanceDate": new Date().toISOString(),
    "credentialSubject": {
      "id": "did:wia:organization:company-123",
      "organization": "Example Corp",
      "compliance": {
        "framework": "SOC2_TYPE_II",
        "period": auditPeriod,
        "controls_tested": 147,
        "controls_passed": 147,
        "effectiveness": "100%",
        "audit_trail_verified": true,
        "evidence_count": 3542
      }
    },
    "proof": await generateProof()
  };

  return vc;
}